# OnSIP Reviews 2026. Verified Reviews, Pros & Cons | Capterra > Is OnSIP the right Business Phone Systems solution for you? Explore 78 verified user reviews from people in industries like yours to make a confident choice. Source: https://www.capterra.com/p/158706/OnSIP/reviews --- OnSIP 4.7 (78) [View alternatives](https://www.capterra.com/p/158706/OnSIP/alternatives/) Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/) * * * Last updated March 13th, 2026 # Reviews of OnSIP Ease of use 4.6 Customer Service 4.9 ## Pros and Cons in Reviews TO Terri O ManagerAirlines/Aviation, 2 - 10 employeesUsed the software for: 1-2 years. “I like how where ever I travel I can make and receive calls as long as I have wifi with out clients seeing my personal phone number“ September 16, 2025 LT Leah T Sales ManagerUtilities, 11 - 50 employeesUsed the software for: 1-2 years. “Still has residual "third-party app" feel - mobil is very buggy, signing in/out on multiple devices can be tedious. If I lock my computer screen, I often need to restart the app to get it working.“ July 29, 2025 KM Keith M IT AdministratorNon-Profit Organization Management, 51 - 200 employeesUsed the software for: More than 2 years. “Auto attendants, call groups, routing options, and voicemail features work smoothly and reliably.“ December 9, 2025 SS Sheila S Front Desk ServicesFinancial Services, 11 - 50 employeesUsed the software for: 1-2 years. “We also have issues with transferring calls/often needing to hang up and give it a second try.“ December 9, 2025 KW Kelsey W Owner RelationsHospitality, 2 - 10 employeesUsed the software for: More than 2 years. “OnSIP has been reliable, easy to use, and backed by outstanding customer support, making it a great solution for our communication needs.“ January 29, 2026 HK Hyun K IT Support ManagerReal Estate, 11 - 50 employeesUsed the software for: More than 2 years. “One complaint is the inability to pre-configure the holiday calendar. “ December 10, 2025 SS Sheila S Front Desk ServicesFinancial Services, 11 - 50 employeesUsed the software for: 1-2 years. “We've had relatively few issues with phone service, and when something has occurred or a question has come up, the customer reps have offered polite and helpful service.“ December 9, 2025 TO Terri O ManagerAirlines/Aviation, 2 - 10 employeesUsed the software for: 1-2 years. “Only con would be when I don't have wifi I can't make or receive calls.“ September 16, 2025 ## Showing most helpful reviews Showing 1-25 of 78 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use Abigail K. Consultant Design Used the software for: 6-12 months ### "I am in love with OnSIP, It has simplified my life!" April 12, 2019 5.0 My experience has been great with OnSIP. They have exceptional customer service I've received exactly what I needed each time. I have a personal coach who checks in with me every so often to ensure that things are going good as well. I highly, highly recommend using this cost effective service for your at home business! Pros I love that I can now add business lines into my home office for a fraction of the cost of doing it through the local phone company and I have clear crisp phone service. Everytime I have needed customer service I have had an excellent experience and they have taken care of each issue with great care and speed getting me back online and going again quickly. With my home office phone I can have up to 4 lines (depending on the phone you can have many more) and I can tell which is ringing so I know how to answer properly and helps me to be more professional. So, so much easier than having my cell phone ring all the time. Cons It doesn't have a texting feature, I just use Google Voice to get this feature it just means that I have to have 2 seperate numbers for my business. Review Source HR Heather R. Staff Accountant Accounting Used the software for: 1-2 years ### "Onsip is great" September 17, 2025 5.0 Pros Onsip is very user friendly and the customer service is great. You can call support and actually talk to a person in the USA. The online portal is user freindly also. Cons I can not think of a con. When we changed over to them, they were great. I had a dedicated person to help me. Switched from [8x8 Work](https://www.capterra.com/p/187525/Virtual-Office/) Cost and customer service on 8x8 was not good. Review Source CC Christian C. Operations Manager Law Practice Used the software for: 2+ years ### "Great Cutomer Service- Always. " June 21, 2023 3.0 Pros the Customer service is always on point. I inherited the service. Cons The Mobile feature is not perfect. It would be nice to call an extension and see if the person was available insted of instantly tranferring. Aslo, the mobile ringtone. It's obnoxious. Ringtone options would be good Review Source TD Tim D. President Consumer Goods Used the software for: 2+ years ### "Works everyday all day long" December 18, 2025 5.0 We have been using the OnSIP product for over 10 years and have yet to outgrow its features. Very pleased with its consistent performance Pros It works consistently, this is critical of any communications tool. You can setup and forget and when you have need of another feature it is fairly simple to implement. If you have any trouble the tech support personnel are outstanding and patient. Cons I do have trouble at times installing the updates. They are not too frequent but I usually have to try multiple times to get an update installed. Review Source ME Maribel E. Office Management Religious Institutions Used the software for: 2+ years ### "Great Customer Service/Solutions" December 9, 2025 5.0 I had so many questions, from reports to finding different issues of our own, and it was such an amazing support. Pros Communication and learning curve. The menu is there, but the support to learn the menus and issues in the situation was excellent Cons Nothing, I believe they are in the right course in training for the issues you may have. Professional, personal, courteous, and aware of the situation. Great training. Review Source KW Kelsey W. Owner Relations Hospitality Used the software for: 2+ years ### "Customer Service is the BEST!" January 29, 2026 5.0 10/10 experience overall. OnSIP has been reliable, easy to use, and backed by outstanding customer support, making it a great solution for our communication needs. Pros Their customer support is absolutely amazing. The team is responsive, knowledgeable, and always willing to go above and beyond to help resolve any issue quickly and professionally. Cons Honestly, I don’t have anything negative to say about OnSIP. Our experience has been consistently positive, and any questions or concerns we’ve had were handled promptly by support. Review Source SA Silvia A. Tax Accountant Accounting Used the software for: 2+ years ### "Phone Support" January 10, 2026 5.0 Great people with extensive knowledge of the phone system. It was easy to ask my questions and receive easy instructions. Pros The phone support was exceptional in my call today. I had questions about updating the phone lines, adding an 800 number that worked immediately & assisted me in call forwarding & connecting my answering service to our Cons Your phone support is very knowledgeable & I was able to speak to a person. The phone support was able to guide me in clear English. Review Source SS Sheila S. Front Desk Services Financial Services Used the software for: 1-2 years ### "ONSIP Phones" December 9, 2025 4.0 Positive. It works. We've had relatively few issues with phone service, and when something has occurred or a question has come up, the customer reps have offered polite and helpful service. That means a lot. Pros It works. We've had relatively few issues with phone service, and when something has occurred or a question has come up, the customer reps have offered polite and helpful service. That means a lot. Cons While I realize the variation of internet providers plays into some issues, I would like the people who work from home to have more reliable service. The often have to log out and login again to keep their ONSIP working remotely. We also have issues with transferring calls/often needing to hang up and give it a second try. Review Source MP Marianna P. Executive Manager Financial Services Used the software for: 2+ years ### "Reliable, User-Friendly VoIP Solution for Business" December 9, 2025 5.0 Overall, my experience with OnSIP has been very positive. It’s a dependable phone system that works well for daily business communication. I love being able to pick up the phone for support and speak with a human Pros OnSIP is incredibly reliable and easy to use. Call quality is consistently clear, and the system is simple to manage, even without advanced technical knowledge. The customer support team is responsive and knowledgeable, which makes a big difference when questions come up. Cons Occasionally, there can be a slight delay when speaking with someone. It doesn’t happen often, but it is noticeable from time to time. Review Source JG Josephine G. Office Admin Maritime Used the software for: 2+ years ### "overall, very happy with OnSip" January 7, 2026 5.0 I've had good experience with OnSip. Any question I have is always answered and they don't rush you off the phone, they seem eager to make the experience positive. Pros Very user friendly company. Helpful over the phone. They answer when you call, a live person, eager to help. Cons web app a little confusing. some technical things I don't get and may never. Totally wish they had better selection of music on hold. Review Source aH amber H. admin Insurance Used the software for: 1-2 years ### "We Love Onsip! " August 28, 2025 5.0 its have been excellent like I stated before Pros If there is ever an issue Phone Support Team is on top of it and they do not take long to respond. Easy to set up and learn to use. Cons there isn't anything I don't like about them. they are always helpful and supportive. Definitely budget friendly as well Switched from [Nextiva](https://www.capterra.com/p/175788/Nextiva/) recommended to switch for security and price Review Source CW Chuck W. CEO Information Technology and Services Used the software for: 1-2 years ### "On Sip - small company review" January 26, 2026 5.0 Very accommodating. Works all the time. Phone support is excellent. Easy to use and configure. Tech Support is excellent Pros Works all the time. Phone support is excellent. Easy to use and configure. Tech Support is excellent Cons Basic plan cost. Porting is always a pain , though I have not had to perform any in the past months. Review Source WK Wendy K. Operations Financial Services Used the software for: 1-2 years ### "Great Support" July 25, 2024 4.0 It's suits our basic needs at this time. Pros Customer service is very friendly and helpful Cons Mobile app is can be unreliable at times and maybe a few additional features. Review Source KG Kim G. Practice Manager and BUsiness Co Owner Medical Practice Used the software for: 2+ years ### "My Experience for 5 years with ONSIP" June 26, 2023 5.0 I have never had any problems. Unfortunately we sold our practice and we really miss ONSIP. we miss all the great features Pros User friendly, i liked that i could answer calls directly to my cell phone from my office. Onsip has a lot of features, that were important to me. Cons None that i can think of. I do not recall ever having a problem with Onsip. Reason for choosing OnSIP Another doctor that we are friends with had it and we saw it and how it work and so we said this would be great for us. Review Source RB Ronald B. President Consumer Electronics Used the software for: 2+ years ### "OnSIP " June 14, 2023 5.0 I use onSIP for multiple businesses, not just multiple locations. and I can't see any reason to move or change. The monthly costs are reasonable and the support is wonderful. Pros The customer support is terrific. The ease of administrating the system via the web is straightforward and comprehensive. Cons When we've used the mobile app, it is a little clunky; frankly, you can get the same functionality, IMHO with a rollover to your mobile phone. Alternatives considered [8x8 Work](https://www.capterra.com/p/187525/Virtual-Office/)[Comcast Business VoiceEdge](https://www.capterra.com/p/230309/Comcast-Business/) Reason for choosing OnSIP Cost and service was a big factor Review Source SA Stephan A. Manager Non-Profit Organization Management Used the software for: 2+ years ### "Good Provider" January 6, 2022 4.0 Customer service is their best attribute. The team is professional with a positive, can do attitude. One of the best teams I have dealt with. Extremely responsive. Pros The value and functionality were perfect for our business. Cons Need more detailed onboarding to take advantage of other benefits or be offered additional services like video conferencing. Review Source JG James G. Director of IT Consumer Electronics Used the software for: 1-2 years ### "OnSIP is a Very Good Simple VOIP System" June 1, 2023 5.0 OnSIP has been easy to work with. Their customer service has been very good. They solve a simple need for us for a minimal cost. Pros Simple to use and configure, inexpensive and very reliable. Cons The interface is a little clunky. Each feature is a separate set up. They are simple, but it would be nice to have them all in one process. OnSIP does not offer a storage service for call recordings. Review Source PC Philip C. Library Associate Libraries Used the software for: 2+ years ### "onsip for business" June 1, 2023 5.0 I havent had any real difficulties with onsip except for defination of terms. i.e VM vs Outgoing message. which to me is the same . so had a difficult time trying to explalin we didnt want a message thatcallers could leave a message on Pros CS support would be biggest reason for choosing onsip. CS staff is alwasy polite and patient in describing or instructing system operation Cons accessibility and knowledge-base of the system. I was not on the installation project of this system and dont know if I would have chosen this system as a library phone system Reason for choosing OnSIP I was not on the decision making staff in choosing this Review Source CV Chris V. Senior Pastor Religious Institutions Used the software for: 2+ years ### "Great savings and support" June 1, 2023 5.0 It’s been great. Even after implementation the support has always been extremely helpful. Pros We transitioned from AT&T landlines to ONSIP years ago. We save an amazing amount of money and we’re fully supported during the implementation/conversion. We paid for all the phones/expenses in the first years savings alone. Cons We are happy with the current offerings and have no complaints. Review Source CN Curt N. Multimedia Tech Non-Profit Organization Management Used the software for: 2+ years ### "Onsip fits us perfectly!" June 6, 2023 5.0 Tech support is responsive Pros We have a lot of seats but not a ton of minutes usage. Traditional per-seat pricing would be cost prohibitive, but onsip's model is great and gives all of our employees options for communication. Cons I wish the soft phone had different admin dashboard reporting when the person was "online" vs "offline".The phone app for our receptionist position only had a global DND option. Wish it had a DND the mobile app but still function through the traditional physical phone. Review Source BL Bill L. Pres Legal Services Used the software for: 2+ years ### "Onsip - Good performance but way overpriced" June 6, 2023 5.0 Good company just very expensive Pros Dependable service - phones never go down. Also I have found Tech support is quite good. Some Tech suppt people such as Rochel have been superb! Cons The cost is very high. I only have two VOIP telephones. Yet the minimum monthly fee with the minutes of telephone use that I pay for I spend over $100 per month! Comparable service for two VOIP lines is about $50 per month total. Review Source JJ Josh J. Systems & Operations Manager Marketing and Advertising Used the software for: 2+ years ### "Great Product backed by Top Tier Customer Service " June 6, 2023 5.0 I have been the admin for around 1 year, and I am very happy to be able to manage my team with little to no headaches. Pros The quick and efficient setup of new employees Cons Hard to say, Phone tree setup seems to be a problem for me at the moment, but I haven't dug in to much. Review Source LC Leonard C. Head of Information Technology Environmental Services Used the software for: 2+ years ### "Reliable and good customer service. But we are losing usage to communications apps" June 6, 2023 4.0 To be honest, we find ourselves using Microsoft Teams for most internal calls, and even some customer calls. Users otherwise use their mobile phones and SMS.When the pandemic hit, everyone worked at home, and kind of weaned themselves off of using our VOIP desk phones. We are not maintaining them. Pros The 'apps'. We still use OnSip for our main company phone lines' 'auto-attendants'. Cons I have trouble with the mobile app on Android. When calls ring, it does not pop to the top, and I cannot answer.This might be an issue with my settings, as other apps have the same issue.I'd like to see Microsoft Teams integration. Review Source KS Kate S. Developer Used the software for: 2+ years ### "Easy to use, convenient, good-enough desktop app" May 11, 2018 4.0 Our connection has always been clear and it's been easy to quickly log in and make calls from other devices when necessary. Only wish would be for a more compact version of the desktop app that could be kept open. The existing app takes a fair amount of real estate on the screen. Pros Easy to move extensions or use the web app across various devices Desktop app is easy to install/setup Clean consistent connection Cons Wish there was a compact version of the desktop app that could be kept open and given screen space at all times when not using a separate phone Review Source VR Verified Reviewer Project Manager, Custom Content Publishing Used the software for: 1-2 years ### "Cloud Phone System Transformed How I Use My Work Phone" May 7, 2019 5.0 Pros Having voicemails sent straight to my email? Awesome. Being able to call from my office line but on my computer? Amazing. Having all my work contacts, extensions and call history across devices? It's great. Cons The mobile app seems underdeveloped in comparison to the web app and overall office phone. 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