# Compare ActiveCampaign vs Thunderbird 2026 | Capterra > Unsure of what to choose? Check Capterra to compare ActiveCampaign and Thunderbird based on pricing, features, product details, and verified reviews. Source: https://www.capterra.com/compare/79367-230507/ActiveCampaign-vs-Thunderbird --- # ActiveCampaign vs Thunderbird Features and Cost Comparison Last updated March 13th, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team.[Learn more](https://www.capterra.com/our-story/) Your comparison: ActiveCampaignThunderbird2/4 selected [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.6 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) [## ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.6 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) Starting Price $15.00/month Value-for-Money 4.3 Functionality 4.5 Ease of Use 4.2 Customer Service 4.4 Reviews Sentiment Based on [2,561 reviews](#user-reviews) Positive 2,381 Neutral 118 Negative 62 [## Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) Starting Price Contact vendor Value-for-Money 4.7 Functionality 4.3 Ease of Use 4.3 Customer Service 3.7 Reviews Sentiment Based on [156 reviews](#user-reviews) Positive 135 Neutral 17 Negative 4 ## Not a match? Find software alternatives tailored to your priorities. These software suggestions are similar to those you’re currently comparing. ### LiveAgent 4.7 (1,753) * * * Starting Price $15.00 Per User,Per Month Free Trial Free Version * * * User rating 97% of reviewers rated it above 4 stars * * * ### Bitrix24 4.2 (983) * * * Starting Price €61.00 Flat Rate,Per Month Free Trial Free Version * * * User rating 82% of reviewers rated it above 4 stars * * * Highest Rated ### Omnisend 4.7 (836) * * * Starting Price $16.00 Usage Based,Per Month Free Trial Free Version * * * User rating 98% of reviewers rated it above 4 stars * * * ### Pipedrive 4.5 (3,042) * * * Starting Price $19.00 Per User,Per Month Free Trial Free Version * * * User rating 93% of reviewers rated it above 4 stars * * * ## Summary * * * Key features rated by users Features selected based on 11,552 reviews from email management software users. about the Fit Score methodology. Fit Score methodology Our Fit Score reflects how reviewers rate a product’s performance against a set of features reviewers rate as most important. A higher score indicates the product is rated better in delivering what reviewers most care about. If the Fit Score is not shown for a specific product, that only means there are currently not enough relevant data points to develop a meaningful score. It does not indicate that the product should be excluded from further evaluation. Best for Methodology 63%Fit Not enough reviews Feature ratings Mobile App 5.0 Email Distribution 4.6 Inbox Management 4.6 Email Monitoring \-- Access Controls/Permissions \-- \--%Fit Missing features Feature ratings Mobile App 5.0 Email Distribution NA Inbox Management 4.5 Email Monitoring NA Access Controls/Permissions NA User satisfaction User satisfaction 4.6 User reviews[2,561](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) Ease of use 4.2 Functionality 4.5 Value for money 4.3 Customer support 4.4 User satisfaction 4.4 User reviews[156](https://www.capterra.com/p/230507/Thunderbird/reviews/) Ease of use 4.3 Functionality 4.3 Value for money 4.7 Customer support 3.7 Price starts from Price starts from $15Flat Rate, Per Month - Free version - Free trial Price starts from \-- - Free version - Free trial Best for Best for ActiveCampaign is the AI-first marketing platform built to transform how marketers, agencies, and entrepreneurs work. Best for Not provided by vendor ## User reviews Pros & cons BY Brian Y. Visa Consulting Specialist > "My automated workflows make it simple to establish six-month follow-up sequences that will nurture clients through a waiting period for government..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7077855) DM David M. Technical Support Engineer > "I do not like the fact that deep segmentation and more sophisticated features require time to master; there are moments that I fear that I am not..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7062259) VR Verified Reviewer Sr People Ops > "It's a secure way to ensure that processes happen correctly and the customer support team and implementation team always remained attentive to our..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7041628) JP Jonathan P. CEO > "I am using AC to send automated sequences to my leads, but I am not using the campaign features, and I am considering swtiching to another tool if..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6456159) VR Verified Reviewer Sr People Ops > "The email management tools allows us to have good control over our campaigns and contacts/prospects." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7041628) LW Laura W. Marketing Coordinator > "The customer support is so slow to fix pressing deliverability problems and the high pricing does not give us a good value." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7096080) GC Graziana C. Customer Operations Lead > "I like the personalized nature of ActiveCampaign, something that gives specific messages to specific clients" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7079738) MW Mona W. CEO and Founder > "a bit expensive from over 2000 Contacts on and sometimes mails have massive delays (especially when there is a mail flow with several mails in a..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6848971) Dan J. COO > "ActiveCampaign offered cost-effective email marketing solutions where many other software could not compete price-wise." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7115517) DB Divan B. Operations Manager > "Also the agent "sent" a payment link for a monthly subscription, but when you follow prompts on the actual site to buy a license, that is not an..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6440952) LH Louise H. Front Office Manager > "ActiveCampaign metrics reports provide very useful insights about our campaigns that help us to evaluate their performances and make necessary..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6555808) AW Andrew W. Owner > "Automation builder can feel clunky and knowlege base articles are often too sparse when you need step-by-step guidances" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6800369) LH Louise H. Front Office Manager > "There are very impressive task automations in ActiveCampaign that allows us to automate the routine marketing tasks like email follow ups." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6555808) DL Dimitris L. Team Lead > "Decent product with awesome user interface that's unfortunately overshadowed by performance issues, increased downtime and a very poor customer..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7009375) Jaden T. Writer > "It features so many tools that you can use to build email or SMS automations that can be triggered or respond to a customer's actions." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6321098) MM Maurizia M. CEO > "This pricing policy is to me very draining and it means that at some point I will be forced to change provider due to unjustified expenses." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6860028) PC Prachi C. developer > "Additionally, the comprehensive reporting and analytics tools provide valuable insights into campaign performance, helping to optimize marketing..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6406150) DK Dan K. Founder > "I want to downgrade and they won't let me until my next renewal in a year." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7030890) RS Rhea S. Internal Sales Executive > "ActiveCampaign gives us useful performance insights and reports that help us take informed actions to improve returns from our marketing campaigns." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6507695) DK Dan K. Founder > "There are many issues: 1) the system has a steep learning curve." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7030890) JK Jamie K. Head of Growth > "It’s super powerful if used by someone with a few years experience of building out complex email workflows and automations, but it was simply too..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6289067) PC Prachi C. developer > "Additionally, the pricing structure can become quite expensive as the contact list grows, which might not be ideal for smaller businesses or those..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6406150) FG Fabrizio G. Design Lead > "This platform has the most profitable marketing campaigns management and monitoring capabilities." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7038963) CB Caspar B. Digital Marketing Manager > "Not easy to track UTM data through forms." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7024419) NM Ngechu M. Full-stack Developer > "ActiveCampaign enables me to create, customize and send high volume outbound marketing emails." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6443094) BA Brenda A. sales leader > "The lead management wasn't that great, or user friendly. If you added contacts, you had to remove old contacts - seems that could be better..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6234656) JK Jamie K. Head of Growth > "It’s possible to create complex campaigns with lots of automated paths, workflows and split-tests for large data sets." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6289067) CH Colleen H. VP of Marketing > "Everything takes TEN TIMES LONGER TO COMPLETE ANYTHING with Active Campaign than any other marketing automation/email system I have ever used in my..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6350234) WH Wilberth H. Asesor Inmobiliario > "The automatization tools are very useful and give me flexibility to design any strategy that is best for my business." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6871583) AG Ana G. Freelancer > "I do feel that the account managers tend to be just glorified customer support, where they don't really help much and I still have to submit..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6713971) CN Christophe N. Thérapist > "ActiveCampaign allows me to easily manage communication campaigns with my audience." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7018121) CH Colleen H. VP of Marketing > "Non-intuitive, difficulty formatting, you are constantly searching for how to do things, and my favorite - just doesn't save what you are working..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6350234) LH Louise H. Front Office Manager > "It has helped us to attract and capture new customers by giving us an efficient platform to communicate with leads during campaigns." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6555808) AK Aleksandra K. Owner > "Sometimes it is loading slowly and there are sometimes (not often) bugs when I want to change the text auf my Email." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6462302) RA Rahman A. Marketing Specialist > "The integrated CRM also helped me maintain clean and responsive customer lists." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6784853) CH Colleen H. VP of Marketing > "Every time anyone on our team uses it, it never works properly and we lose information all the time (Customer Service was of no help in this area)." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6350234) RM Rachel M. Digital Campaign Executive > "The automation workflows are a game-changer, and the reporting tools are awesome for tracking your results." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6578401) RA Rahman A. Marketing Specialist > "This can get a little messy, especially when you are dealing with  multiple campaigns." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6784853) ZZ Zandalee Z. Senior Analyst Programmer > "ActiveCampaign offers capabilities which allows me to automate marketing in real-time." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6493055) MH Marcus H. CEO > "There are also occasional issues with reliability—some features don’t always work as expected. While this might not be unique to ActiveCampaign,..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6640691) CB Caspar B. Digital Marketing Manager > "Email campaigns and automations work and are sent out in a timely manner." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7024419) SM Selena M. Singing Coach > "Eventually someone told me that it was an issue with a deep tech issue of the platform and that would take a lot of time to resolve." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7010620) BL Billy L. Operations > "The segments and tag functions make it easy to split up a list of contacts into different categories and send out more personalised emails" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6582040) KS Kathryn S. Owner > "They continued to explain in increasingly simple language as though I just didn't understand how this was totally reasonable." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7082123) LD Laura D. Client Success Specialist > "It also has great reporting and analytic features for email engagement." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6790050) DE Duncan E. Web Specialist > "Now we have to spend time and money moving because we don't want to be held hostage with continual price increases and no viable options to..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6705737) JM Joao M. Spinning Instructor > "It has allowed us to automate the error-prone and tedious tasks making our work very accurate and less demanding." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6440201) HH Hendrik H. Marketing manager > "Their customer service however is the worst I ever experienced. If you have a question, you have to open a chat and talk to people that don't know..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6452695) KP Khevana P. Tech Lead > "We have been using ActiveCampaign for the last few years and have lots of automation and customization based on Active Campaign." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6503130) CB Caspar B. Digital Marketing Manager > "Bad usability and very buggy." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7024419) BL Billy L. Operations > "Activecampaign is a great way to store a central contact list and send out marketing emails - that's what I use it for" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6582040) ST Sarah T. Health Coach > "sometimes I find it tricky to choose the right form and/or when having multiple tags for segmenting" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6644647) BT Bodamer T. Foreign Language and Localization Administrator > "It allows us to come up with personalized campaigns to capture a targeted audience." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6338693) CO Chris O. President > "The platform's visual design and user interface aren't quite as polished or modern as competitors like HubSpot." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6579310) CN Christophe N. Thérapist > "Thanks to the integration of artificial intelligence, this work is greatly accelerated for a truly professional result." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7018121) DL Dimitris L. Team Lead > "Our forms were not capturing leads for 4 months." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7009375) JF Joe F. Associate Professor of Law > "It allows us to strategize our marketing campaigns in order to make them more successful." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6720501) KS Kathryn S. Owner > "Decent features but outrageous pricing practices." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7082123) SM Selena M. Singing Coach > "The customer support has been really helpful, they've given me all the time I needed to understand my problems and provide tailored solutions." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7010620) MH Marit H. CEO > "Also, sometimes a scheduled campaign doesn't work or gets stuck and you don't get an error or message about it." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6288029) RA Rahman A. Marketing Specialist > "The open rates shot up, and we actually received more replies than usual from the segmented list." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6784853) ClJ Céline J. Social Media Manager > "We also noticed that getting in touch with human support tends to be impossible." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6873052) JM Joao M. Spinning Instructor > "We have had it all right running our digital marketing campaigns with ActiveCampaign and the automations has taken a huge fight for us." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6440201) PK Paulette K. Credit Risk Analyst > "The landing page builder feels a bit basic compared to similar tools." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6486875) Christina S. Area Director of Sales > "Powerful marketing analytical tools that gives accurate reports about campaigns performance." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6342026) FG Francesco G. Partner > "the prices have gone up consistently without a serious improvement in features despite their position in the market, their integration with..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6114791) MH Marcus H. CEO > "Additionally, the API is well-documented and versatile, offering seamless integration with other tools and platforms." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6640691) CB Caspar B. Digital Marketing Manager > "Not easy to manage contact lists." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7024419) Emma B. Senior Director Product Marketing > "We can now automate our email processes, keep closer tabs on our conversion rates, and reduce the time it takes to send out communications thanks..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___4969107) SM Selena M. Singing Coach > "It was good in many ways but the issue I described above was extremely frustrating and disappointing and is part of the reason I'm leaving." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7010620) MA Mitusha A. Developer > "ActiveCampaign has helped me gain leads via social marketing content and get the information on the internal Slack channel and Salesforce that is..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6061447) BT Beth T. CMO > "I don't have 100% confidence is in the accuracy of the email campaign performance metrics." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6241537) NE Noel E. Computer Tech > "The software offers a variety of templates and customization options that allow businesses to create email campaigns tailored to the needs and..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___4763537) Carlos P. Key Account Manager > "Sometimes the size of the source does not stay the same when you alter the path and when you view the source code, everything is just a single row,..." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___4850688) MH Marcus H. CEO > "The advanced automations are incredibly powerful, allowing for highly personalized and efficient workflows." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6640691) MW Michelle W. Social Media Manager > "Some automations did not work immediately for inexplicable reasons." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6358627) CC Crystal C. researcher > "To further develop the general client experience, you can send customized messages to your site clients." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6481880) SM Selena M. Singing Coach > "So I gave up on that automation and others like it." [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___7010620) JP Jonathan P. CEO > "Useful tool to automate emails to leads and manage our sales process" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6456159) NS Niraj S. Alliance Lead > "UI feels outdated: Not as smooth as competitiors" [See full review](https://www.capterra.com/p/79367/ActiveCampaign/#Capterra___6710630) [View Reviews](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) Leandro A. Developer > "I use it as my main email client , both for personal use and for work , it feels comfortable .Big plus that they don't spam you" [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___7054778) SA Sara A. Engineer > "The settings interface is a bit confusing; in the future 365 email accounts may have issues to works as Thunderbird does not..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6357971) SP Stuart P. Product Manager > "I was using another free email client that would not let me use different ports for incoming and outgoing mail so when searching..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6880981) JMV Jose Miguel V. Adjunct Professor > "Aesthetics and UI: For me, this is a big problem. While this is subjective, and the interface can be customized, when you open..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912) Leandro A. Developer > "Also is open source and doesn't spam you" [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___7054778) Brendan B. Coach > "I have had certain performance issues that I could not explain or fix." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6799859) Brendan B. Coach > "Free, open, power, highly customizable email client." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6799859) RK Robert K. drafting > "some extensions have bugs like send later" [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6737417) JMV Jose Miguel V. Adjunct Professor > "Right now I am using Thunderbird for all my personal emails, and the client has all you need to manage successfully all your..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912) JF Jamie F. Lead Technician > "I always when trying to select the top email accidentally click the column header and re-order the emails which is annoying,..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5093745) MK Matt K. Consultant > "Even when I've had ten or more email addresses to manage for different clients, it's been up to the job and easy to use." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6463718) SA Sara A. Engineer > "I don't like very much the menu, especially the settings section." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6357971) NP Nicolas P. IT Manager > "Very simple to use but could be configurated to have lots of stuff" [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6805419) VR Verified Reviewer Operations Analyst > "Lack of Cloud Integration: Thunderbird does not offer cloud integration, which may limit its usefulness for users who need to..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113) Sunny K. Marketing Manager > "Additionally, it facilitates the management of multiple email inboxes in a single, convenient location, which can be quite..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#GetApp___6048711) UA Ubed A. Verification expert > "However, some users may find Thunderbird's user interface outdated compared to other modern email clients, and it may not..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) JM Juan M. SEO supervisor > "The intuitive user interface makes navigation a breeze, and the seamless integration with my existing email accounts was a huge..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4981089) VR Verified Reviewer Operations Analyst > "Limited Mobile Support: Thunderbird does not have a dedicated mobile app, which may make it difficult for users to access their..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113) DK Dev K. Design Engineer > "This is a best-of-class, open source and Free Software desktop email client that works very well with all necessary email..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6130553) VR Verified Reviewer Operations Analyst > "Limited Customer Support: Thunderbird is an open-source project, which means that customer support is limited and users may have..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113) JMV Jose Miguel V. Adjunct Professor > "Another great addition of the last years was the "Smart folders," making your multiple account inbox easier to visit and search." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912) VR Verified Reviewer Operations Analyst > "Complex User Interface: Some users may find Thunderbird's user interface to be complex and difficult to navigate, especially if..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113) Sunny K. Marketing Manager > "I have set up multiple accounts in Thunderbird, making it convenient for me to receive emails in one place." [See full review](https://www.capterra.com/p/230507/Thunderbird/#GetApp___6048711) JMV Jose Miguel V. Adjunct Professor > "This one was my first problem after I switch from Microsoft Outlook." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912) UA Ubed A. Verification expert > "Security and privacy: Thunderbird includes features such as encryption, phishing protection, and spam filtering that enhance..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) Gustavo B. Director > "It does not offer any cloud based system that might allow the software to be used away from where it was installed and..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3484995) Hugo G. Software developer and support > "Overall pleased but I'll like to see it improved" [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6805669) James C. Sales and Marketing > "Sometimes I had difficulty and slowness to do more specific searches, using keywords that were in the body of the email." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3444626) VR Verified Reviewer Operations Analyst > "Customizable: Thunderbird Mail is highly customizable, allowing users to personalize their email experience by choosing from a..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113) VR Verified Reviewer DAM Expert > "No support per email or phone." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5001917) MK Matt K. Consultant > "It's been my go-to desktop email client for twenty years." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6463718) MT Monica T. Project Manager > "Sometimes when there are a lot of emails coming in it gets stuck, and from time to time I need to delete some of the emails." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3808513) DM Davide M. Indie Game Developer > "I've benn using Thunderbird for several years and have had an overall positive experience with the software. While there are..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5081958) JD Jacob D. Executive > "Namely, half the time when you repond, the reply won't be shown automatically inline (for at least several minutes)." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3513931) Austin M. Software Analyst > "I think the most impactful thing about Thunderbird is the community that uses the software, making it evolve constantly and..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5079584) UA Ubed A. Verification expert > "Lack of support: Thunderbird is maintained by a small community of developers, so users may not receive prompt support or..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) AR Ari R. CEO > "nice interface;- calendar built in (very well thought out);- tabs for better viewing;- mail and calendar pane in one single..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4153313) Robert M. Freelancer > "I do not know why they have separated outgoing server settings in another section from the account setting." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3763863) UA Ubed A. Verification expert > "Additionally, Thunderbird's ability to manage multiple email accounts from different providers, including POP, IMAP, and..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) Robert M. Freelancer > "The search and filter are not very functional, and I could not find my desired result from it." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3763863) VR Verified Reviewer Consultant / developer > "Thunderbird is full of features, customizable with addons and themeable." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842831) VR Verified Reviewer Operations Analyst > "However, some users may find the user interface to be complex and the performance to be slow on older computers." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113) UA Ubed A. Verification expert > "Thunderbird offers a wide range of add-ons and extensions that allow users to customize the program according to their needs." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) DS David S. Tech Acct MGR > "Setting up Microsoft exchange inside of Thunderbird is difficult if you do not know what you're doing there really is no work..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3834541) Sunny K. Marketing Manager > "It accommodates various mail types and allows for easy configuration." [See full review](https://www.capterra.com/p/230507/Thunderbird/#GetApp___6048711) VR Verified Reviewer CEO > "The calendar and all the addons can't compete with Google or other alternatives." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4580663) UA Ubed A. Verification expert > "Its free and open-source software status and cross-platform support also make it a popular choice for users across different..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) Gonzalo M. Managing Director > "Integrates less well into Windows than some alternatives." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3712769) JM Juan M. SEO supervisor > "Thunderbird has truly revolutionized the way I manage my inbox, and I couldn't be more impressed." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4981089) TB Tanya B. Technician > "One thing i particullarly hated was the fact that the program was crashing on me from time to time." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4620389) Mohamed E. Customer Success Specialist > "I receive all the important emails on this software, it saves a lot of time and gets me notified of any available vacancies." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4635676) James C. Sales and Marketing > "I've had problems with the manager simply stopping working and having to restart." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3444626) VR Verified Reviewer DAM Expert > "Of course, I like that it is open-source and free of costs. And I like Thunderbird Filelink." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5001917) JD Jacob D. Executive > "However, this add-on comes with its own bunch of issues." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3513931) JM Juan M. SEO supervisor > "From the moment I started using Thunderbird, it was evident that this tool was designed with productivity in mind." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4981089) JD Jacob D. Executive > "Thunderbird, from my experience, is incredibly slow and buggy." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3513931) SS Shashi S. Student > "It has fewer features than outlook but as a University student, the software works fine for me because I don't need all those..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4473755) AR Ari R. CEO > "RAM memory is another con that I'd point out." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4153313) UA Ubed A. Verification expert > "Overall, Mozilla Thunderbird is a popular email client that provides a range of features and customization options." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069) Robert M. Freelancer > "Maybe it is my mistake, So at least it is not user-friendly enough to learn and work with." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3763863) GS Grant S. Head of Sales > "All the features but leaner, more stable & faster." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6165374) DP Darian P. Team Lead of Internal Tools > "We don't use the calendar functionality because it constantly would not work for our users." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3021391) JMV Jose Miguel V. Adjunct Professor > "Since I have been using Thunderbird, I never regret my switch from Outlook." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912) VR Verified Reviewer Senior system engineer > "Most generic features are commercialized which will tend other users to use different mail clients" [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3431281) SP Shane P. Security system engineer > "I like the fact that Thunderbird was free and worked for the most part." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6008627) SP Santosh P. Digital Marketer > "Iwas needing cloud access to mails and my webmail was not cutting it." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3198853) Petter K. Parish Manager > "I think the main thing I can say that I like about Thunderbird is that it is free." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6193707) AL Ad L. Director > "It has a rather childish menu bar layout in black and white." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3024426) ML Mark L. Owner > "A great way to use an email system that is very low cost and has the features and benfits you will need for many small business..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3639522) Bill B. President > "Another issue I have is with the built-in calendar. " [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3258266) Stanley M. System Administrator > "I love the new modern look that ships with Thunderbird and the support for dark theme." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4169265) SP Shawn P. Owner > "The UI is incredibly outdated." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3394046) VR Verified Reviewer Senior system engineer > "I think if you want to sync your gmail,hotmail, yahoo mail with your local client, Thunderbird is one such mail client which..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3431281) AL Ad L. Director > "The opening of tabs is something i personally do not like." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3024426) JJ Jeet J. Founder & CEO > "Moreover, it also supports adding SMTP mail which is really helpful." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4053362) Teya B. Teacher: Digital Illustration > "I find the interface very, very dated." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3150330) AR Ari R. CEO > "I was delighted to start using this app when a coworker recommended it to me because I'd been trying to find something that was..." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4153313) AL Ad L. Director > "Don't like the visual." [See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3024426) [View Reviews](https://www.capterra.com/p/230507/Thunderbird/reviews/) ## User interface [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/) 4.56 (2,561) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/) 4.40 (156) ### Features Do these products fit your needs? Prioritize real-user-identified key features according to your needs to find your best fit. \--% Fit vs \--% Fit Access Controls/Permissions 207 Important Activity Dashboard 150 Important AI Copilot 120 Important ActiveCampaign Top features 43/47 - Access Controls/Permissions - Activity Dashboard - AI Copilot - Alerts/Notifications - API - Archiving & Retention - Autoresponders - Campaign Analytics - Campaign Management - Canned Responses - Chat/Messaging - Collaboration Tools - Contact Management - Customer Segmentation - Customizable Fields - Customizable Forms - Customizable Templates - Data Recovery - Drag & Drop - Email Distribution - Email Marketing - Email Monitoring - Email Templates - Email Tracking - Generative AI - Inbox Management - Mobile App - Multiple User Accounts - Prioritization - Process/Workflow Automation - Queue Management - Real-Time Analytics - Real-Time Monitoring - Real-Time Reporting - Reporting/Analytics - Response Management - Routing - Search/Filter - Shared Inboxes - Signature Management - Social Media Integration - Spam Blocker - Support Ticket Management - Tagging - Third-Party Integrations - Whitelisting/Blacklisting - Workflow Management [See all features](https://www.capterra.com/p/79367/ActiveCampaign/#features) Thunderbird 12/47 - Access Controls/Permissions - Activity Dashboard - AI Copilot - Alerts/Notifications - API - Archiving & Retention - Autoresponders - Campaign Analytics - Campaign Management - Canned Responses - Chat/Messaging - Collaboration Tools - Contact Management - Customer Segmentation - Customizable Fields - Customizable Forms - Customizable Templates - Data Recovery - Drag & Drop - Email Distribution - Email Marketing - Email Monitoring - Email Templates - Email Tracking - Generative AI - Inbox Management - Mobile App - Multiple User Accounts - Prioritization - Process/Workflow Automation - Queue Management - Real-Time Analytics - Real-Time Monitoring - Real-Time Reporting - Reporting/Analytics - Response Management - Routing - Search/Filter - Shared Inboxes - Signature Management - Social Media Integration - Spam Blocker - Support Ticket Management - Tagging - Third-Party Integrations - Whitelisting/Blacklisting - Workflow Management [See all features](https://www.capterra.com/p/230507/Thunderbird/#features) ### Recognition No recognitions have been awarded to ActiveCampaign No recognitions have been awarded to Thunderbird ### Deployment & support ActiveCampaign Deployment - Cloud, SaaS, Web-Based - Desktop Mac - Desktop Windows - Desktop Linux - On-Premise Windows - On-Premise Linux - Desktop Chromebook - Mobile Android - Mobile iPhone - Mobile iPad Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos Thunderbird Deployment - Cloud, SaaS, Web-Based - Desktop Mac - Desktop Windows - Desktop Linux - On-Premise Windows - On-Premise Linux - Desktop Chromebook - Mobile Android - Mobile iPhone - Mobile iPad Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos ### Company Details ActiveCampaign - By ActiveCampaign - Located in United States - Founded in 2003 Thunderbird - By Mozilla - Located in United States - Founded in ## Popular Comparisons [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.56 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) vs [Brevo](https://www.capterra.com/p/132996/brevo/)[4.62 (3,406)](https://www.capterra.com/p/132996/brevo/reviews/) $15/month Price $9/month 4.5 Features 4.5 4.2 Ease of Use 4.6 [View full comparison](https://www.capterra.com/compare/79367-132996/ActiveCampaign-vs-brevo) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) vs [Gmail](https://www.capterra.com/p/202338/Gmail/)[4.81 (13,316)](https://www.capterra.com/p/202338/Gmail/reviews/) $0 Price $0 4.3 Features 4.7 4.3 Ease of Use 4.8 [View full comparison](https://www.capterra.com/compare/202338-230507/Gmail-vs-Thunderbird) [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.56 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) vs [Mailchimp](https://www.capterra.com/p/110228/MailChimp/)[4.48 (17,565)](https://www.capterra.com/p/110228/MailChimp/reviews/) $15/month Price $13/month 4.5 Features 4.4 4.2 Ease of Use 4.4 [View full comparison](https://www.capterra.com/compare/79367-110228/ActiveCampaign-vs-MailChimp) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) vs [Google Workspace](https://www.capterra.com/p/247901/Google-Workspace/)[4.70 (17,471)](https://www.capterra.com/p/247901/Google-Workspace/reviews/) $0 Price $7/month 4.3 Features 4.6 4.3 Ease of Use 4.6 [View full comparison](https://www.capterra.com/compare/230507-247901/Thunderbird-vs-Google-Workspace) [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.56 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) vs [MailerLite](https://www.capterra.com/p/136603/MailerLite/)[4.71 (2,256)](https://www.capterra.com/p/136603/MailerLite/reviews/) $15/month Price $10/month 4.5 Features 4.5 4.2 Ease of Use 4.6 [View full comparison](https://www.capterra.com/compare/79367-136603/ActiveCampaign-vs-MailerLite) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) vs [Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)[4.54 (2,421)](https://www.capterra.com/p/227138/Microsoft-Outlook/reviews/) $0 Price Contact vendor for pricing 4.3 Features 4.5 4.3 Ease of Use 4.5 [View full comparison](https://www.capterra.com/compare/227138-230507/Microsoft-Outlook-vs-Thunderbird) [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.56 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) vs [Constant Contact](https://www.capterra.com/p/31898/Constant-Contact/)[4.34 (2,911)](https://www.capterra.com/p/31898/Constant-Contact/reviews/) $15/month Price $12/month 4.5 Features 4.2 4.2 Ease of Use 4.3 [View full comparison](https://www.capterra.com/compare/31898-79367/Constant-Contact-vs-ActiveCampaign) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) vs [Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.65 (14,028)](https://www.capterra.com/p/227157/Microsoft-365/reviews/) $0 Price $6/month 4.3 Features 4.6 4.3 Ease of Use 4.5 [View full comparison](https://www.capterra.com/compare/227157-230507/Microsoft-365-vs-Thunderbird) [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.56 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) vs [EmailOctopus](https://www.capterra.com/p/147415/EmailOctopus/)[4.79 (653)](https://www.capterra.com/p/147415/EmailOctopus/reviews/) $15/month Price $9/month 4.5 Features 4.5 4.2 Ease of Use 4.7 [View full comparison](https://www.capterra.com/compare/79367-147415/ActiveCampaign-vs-EmailOctopus) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) vs [Yahoo Mail](https://www.capterra.com/p/266980/Yahoo-Mail/)[4.23 (845)](https://www.capterra.com/p/266980/Yahoo-Mail/reviews/) $0 Price Contact vendor for pricing 4.3 Features 4.1 4.3 Ease of Use 4.4 [View full comparison](https://www.capterra.com/compare/230507-266980/Thunderbird-vs-Yahoo-Mail) [ActiveCampaign](https://www.capterra.com/p/79367/ActiveCampaign/)[4.56 (2,561)](https://www.capterra.com/p/79367/ActiveCampaign/reviews/) vs [Systeme.io](https://www.capterra.com/p/198994/Systeme/)[4.83 (2,126)](https://www.capterra.com/p/198994/Systeme/reviews/) $15/month Price $17/month 4.5 Features 4.7 4.2 Ease of Use 4.6 [View full comparison](https://www.capterra.com/compare/79367-198994/ActiveCampaign-vs-Systeme) [Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/) vs [Brevo](https://www.capterra.com/p/132996/brevo/)[4.62 (3,406)](https://www.capterra.com/p/132996/brevo/reviews/) $0 Price $9/month 4.3 Features 4.5 4.3 Ease of Use 4.6 [View full comparison](https://www.capterra.com/compare/132996-230507/brevo-vs-Thunderbird)