# Best Anti-spam Software 2026 | Capterra > Find the top Anti-spam software of 2026 on Capterra. Based on millions of verified user reviews - compare and filter for whats important to you to find the best tools for your needs. Source: https://www.capterra.com/anti-spam-software --- # Best Anti-spam Software Last updated on March 15, 2026 How to find the right Anti-spam Software? Learn more from our team about Anti-spam Software pricing features and benefits in our Anti-spam Buyers Guide Verified Insights Provider data verified by our Software Research team and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/) ## What is anti-spam software? Researched by: [Capterra](https://www.capterra.com/resources/author/capterra/) Updated on March 15, 2026 [Anti-spam software](https://www.capterra.com/anti-spam-software/) allows users to detect and block malicious emails by scanning content for potential threats. These tools check the IP reputation score of an inbound email, validate the recipient's email address, confirm that the email is from the authorized host, and inspect the email's content using bayesian analysis. This helps the software assign a “spam score” to each email. Administrators can set a “spam acceptance threshold” to reject, quarantine, or flag emails. * * * For more information consult our [Anti-spam Buyers Guide](#buyers-guide-content) [5.0 (1)](https://www.capterra.com/p/250406/Heimdal-Email-Security/#reviews) A versatile email protection solution that combines Office 365 support with proprietary threat prevention in the cloud and on-premise. [Learn more about Heimdal Email Security](https://www.capterra.com/p/250406/Heimdal-Email-Security/) [4.9 (12)](https://www.capterra.com/p/178083/CLEARNETWORK/#reviews) Malicious email is a major threat. ContentCatcher protects your organization from phishing, spam, ransomware, URLs, attachments & more. [Learn more about ContentCatcher](https://www.capterra.com/p/178083/CLEARNETWORK/) [## ESET Endpoint Security](https://www.capterra.com/p/151915/ESET-Endpoint-Security/) [4.7 (1169)](https://www.capterra.com/p/151915/ESET-Endpoint-Security/reviews/) Great for: Monitoring Cybersecurity to prevent data breaches for organizations with 250+ employees, covering a suite of devices, networks, and applications. [Learn more about ESET Endpoint Security](https://www.capterra.com/p/151915/ESET-Endpoint-Security/) 82% of users recommend this product [## SpamTitan](https://www.capterra.com/p/168436/SpamTitan/) [4.6 (563)](https://www.capterra.com/p/168436/SpamTitan/reviews/) Good for: Spam Detection SpamTitan is a cloud based Anti Spam email filter. It is an easy to use, effective, multi-award winning Anti-Spam, malware blocking and [Learn more about SpamTitan](https://www.capterra.com/p/168436/SpamTitan/) 84% of users recommend this product [## Microsoft Defender for Office 365](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/) [4.6 (236)](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/reviews/) Great for: Small Business Microsoft Defender for Office 365 protects all of Office 365 against advanced threats. [Learn more about Microsoft Defender for Office 365](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/) [## Malwarebytes for Teams](https://www.capterra.com/p/229999/Malwarebytes-for-Teams/) [4.5 (161)](https://www.capterra.com/p/229999/Malwarebytes-for-Teams/reviews/) Good for: Value for Money Malwarebytes for Teams protects against malware, ransomware, viruses, hackers, and other established and emerging cyberthreats. [Learn more about Malwarebytes for Teams](https://www.capterra.com/p/229999/Malwarebytes-for-Teams/) 80% of users recommend this product [## Symantec Email Security.cloud](https://www.capterra.com/p/168448/Email-Security-cloud/) [4.5 (159)](https://www.capterra.com/p/168448/Email-Security-cloud/reviews/) Good for: Ease of Use Threat and anti-spam protection system intended to defend your email from phishing, ransomware, and business email compromise. [Learn more about Symantec Email Security.cloud](https://www.capterra.com/p/168448/Email-Security-cloud/) [## Zerospam](https://www.capterra.com/p/173157/ZEROSPAM/) [4.8 (135)](https://www.capterra.com/p/173157/ZEROSPAM/reviews/) Great for: Value for Money Zerospam The AI-driven email security solution [Learn more about Zerospam](https://www.capterra.com/p/173157/ZEROSPAM/) 94% of users recommend this product [## Trend Micro Smart Protection Complete Suite](https://www.capterra.com/p/238554/InterScan-Messaging-Security/) [4.1 (75)](https://www.capterra.com/p/238554/InterScan-Messaging-Security/reviews/) Smart Protection Suites infuse high-fidelity machine learning to a blend of threat protection techniques to eliminate security gaps. [Learn more about Trend Micro Smart Protection Complete Suite](https://www.capterra.com/p/238554/InterScan-Messaging-Security/) [## Xeams](https://www.capterra.com/p/182895/Xeams/) [4.7 (74)](https://www.capterra.com/p/182895/Xeams/reviews/) An email server with a powerful built in spam and junk message filtering engine that eliminates up to 99% of spam upon installation. [Learn more about Xeams](https://www.capterra.com/p/182895/Xeams/) [## ALTOSPAM](https://www.capterra.com/p/176264/ALTOSPAM/) [4.8 (73)](https://www.capterra.com/p/176264/ALTOSPAM/reviews/) SaaS software security filter : antispam, antivirus, antiphishing, antiransomwares. [Learn more about ALTOSPAM](https://www.capterra.com/p/176264/ALTOSPAM/) [## Topsec Cloud Solutions](https://www.capterra.com/p/145598/Topsec-Email-Security/) [4.9 (69)](https://www.capterra.com/p/145598/Topsec-Email-Security/reviews/) Topsec Email Security eliminates spam, viruses, malware, ransomware, phishing, and quarantines undesirable and/or illicit content. [Learn more about Topsec Cloud Solutions](https://www.capterra.com/p/145598/Topsec-Email-Security/) [## Truecaller](https://www.capterra.com/p/234073/Truecaller/) [4.5 (64)](https://www.capterra.com/p/234073/Truecaller/reviews/) Truecaller is a leading global caller ID and spam blocking app that identifies unknown callers and blocks unwanted calls. [Learn more about Truecaller](https://www.capterra.com/p/234073/Truecaller/) [## Avanan](https://www.capterra.com/p/170001/Avanan-Cloud-Security-Platform/) [4.8 (51)](https://www.capterra.com/p/170001/Avanan-Cloud-Security-Platform/reviews/) In just one click, secure Microsoft 365, Google Workspaces, Slack, Teams and more against the latest threats. [Learn more about Avanan](https://www.capterra.com/p/170001/Avanan-Cloud-Security-Platform/) [## McAfee Security for Email Servers](https://www.capterra.com/p/201993/McAfee-Security-for-Email-Servers/) [4.6 (50)](https://www.capterra.com/p/201993/McAfee-Security-for-Email-Servers/reviews/) Helps businesses check emails for viruses, worms, malware, spam and more. [Learn more about McAfee Security for Email Servers](https://www.capterra.com/p/201993/McAfee-Security-for-Email-Servers/) [## LeanMail](https://www.capterra.com/p/200711/LeanMail/) [4.8 (43)](https://www.capterra.com/p/200711/LeanMail/reviews/) LeanMail brings relief for MS Outlook users who have tried to keep their inbox organized but have given up. 5 solutions in one. [Learn more about LeanMail](https://www.capterra.com/p/200711/LeanMail/) [## Spambrella](https://www.capterra.com/p/174341/Spambrella/) [4.8 (42)](https://www.capterra.com/p/174341/Spambrella/reviews/) Spambrella is used Globally by some of the Worlds largest and most successful security service providers. [Learn more about Spambrella](https://www.capterra.com/p/174341/Spambrella/) [## ESET Home Office Security Pack](https://www.capterra.com/p/253681/ESET-Home-Office-Security-Pack/) [4.8 (32)](https://www.capterra.com/p/253681/ESET-Home-Office-Security-Pack/#reviews) Protect your equipment from digital threats. Complete security for small and medium businesses.  [Learn more about ESET Home Office Security Pack](https://www.capterra.com/p/253681/ESET-Home-Office-Security-Pack/) [## Mail Assure](https://www.capterra.com/p/178413/Mail-Assure/) [4.5 (29)](https://www.capterra.com/p/178413/Mail-Assure/reviews/) Cloud-based email security designed to help your customers stay in control while safeguarding their inbound and outbound email. [Learn more about Mail Assure](https://www.capterra.com/p/178413/Mail-Assure/) [## Graphus](https://www.capterra.com/p/219920/Graphus/) [4.3 (27)](https://www.capterra.com/p/219920/Graphus/reviews/) Graphus is an AI-powered cloud email security and anti- phishing solution that provides 3 layers of defense for MS365 & GSuite users. [Learn more about Graphus](https://www.capterra.com/p/219920/Graphus/) [## MailCleaner](https://www.capterra.com/p/93208/MailCleaner/) [4.6 (26)](https://www.capterra.com/p/93208/MailCleaner/reviews/) Professional anti spam and threats server protection for ISP, SME, SMI & large companies. [Learn more about MailCleaner](https://www.capterra.com/p/93208/MailCleaner/) [## Cisco Secure Email](https://www.capterra.com/p/175870/Cisco-Email-Security/) [4.6 (25)](https://www.capterra.com/p/175870/Cisco-Email-Security/reviews/) Email security solution designed for Office 365 that helps businesses deal with phishing, malware, ransomware, and malicious links. [Learn more about Cisco Secure Email](https://www.capterra.com/p/175870/Cisco-Email-Security/) [## MailWasher](https://www.capterra.com/p/57748/MailWasher/) [4.2 (25)](https://www.capterra.com/p/57748/MailWasher/reviews/) MailWasher Free blocks spam for all email providers, keeping inboxes clutter-free. [Learn more about MailWasher](https://www.capterra.com/p/57748/MailWasher/) [## Radware Bot Manager](https://www.capterra.com/p/149999/Bot-Prevention-Solution/) [4.6 (24)](https://www.capterra.com/p/149999/Bot-Prevention-Solution/reviews/) Radware® (NASDAQ: RDWR), a leading provider of cybersecurity and application delivery solutions, acquired ShieldSquare in March 2019. [Learn more about Radware Bot Manager](https://www.capterra.com/p/149999/Bot-Prevention-Solution/) [## MailChannels](https://www.capterra.com/p/162308/MailChannels/) [4.7 (23)](https://www.capterra.com/p/162308/MailChannels/reviews/) MailChannels is a secure email service that sends your customer mail and handles anti-abuse for time-savings and customer satisfaction. [Learn more about MailChannels](https://www.capterra.com/p/162308/MailChannels/) Page 1 of 4 Filter (79) Products: Sort By: Sponsored * * * Plan Type Free Trial Popular 85% of professionals opt for a 30-day trial before the software purchase Other subsciption plans: Free Version Monthly Subscription Annual Subscription One-Time License Key Features All key features Popular We have selected the most important and critical features as defined by Capterra user reviews AI Copilot Allow/Block List Archiving & Retention Email Routing Encryption Generative AI Reporting/Analytics Spam Blocker Spam Detection Spam Quarantine 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 Related Software Category: [Email Security Software](https://www.capterra.com/email-security-software/)[Website Accessibility Software](https://www.capterra.com/website-accessibility-software/)[VPN Software](https://www.capterra.com/vpn-software/)[Firewall Software](https://www.capterra.com/firewall-software/)[Website Security Software](https://www.capterra.com/website-security-software/)[DDoS Protection Software](https://www.capterra.com/ddos-protection-software/)[Network Access Control (NAC) Software](https://www.capterra.com/network-access-control-software/)[Secure Email Gateway Software](https://www.capterra.com/secure-email-gateway-software/)[Cloud Access Security Broker (CASB) Software](https://www.capterra.com/cloud-access-security-broker-casb-software/) I'm looking for Anti-spam Software that is: [Free](https://www.capterra.com/anti-spam-software/s/free/)[For Mac](https://www.capterra.com/anti-spam-software/s/mac/) Table of Contents - [The benefits of anti-spam software](#the-benefits-of-anti-spam-software) - [Typical features of anti-spam software](#typical-features-of-anti-spam-software) - [The cost of anti-spam software](#the-cost-of-anti-spam-software) - [Considerations when purchasing anti-spam software](#considerations-when-purchasing-anti-spam-software) - [Relevant anti-spam software trends](#relevant-anti-spam-software-trends) ## The benefits of anti-spam software - **Block spam emails:** Anti-spam tools not only allow businesses to block specific email addresses but also analyze target keywords in the subject line or email body to flag potential threats. Such emails can be quarantined for a few days and then archived. During the storage period, the recipient has the ability to approve/recover any flagged emails. - **Report spam:** Anti-spam software allows email recipients to report an email as spam to help the software provider create a new type of filter based on an analysis of the reported spam. - **Scan outbound emails:**  Some anti-spam software with outbound scanning features can flag outgoing emails with a high spam score. They also facilitate data loss prevention by identifying insider attempts to share sensitive data externally by sending to personal email accounts. * * * ## Typical features of anti-spam software - **Spam detection:** Detects and flag spam, bots, or invalid messages and emails. - **Spam blocker:** Block IP addresses with reputation scores that fail to meet a certain threshold. - **Reporting/analytics:** View and track pertinent metrics such as number of spam emails received in a month and the number of emails reported as spam by a specific recipient. - **Quarantine:** Place spam and other potentially malicious emails in a quarantine state for a specified period of time.  - **Archiving and retention:** Define retention policy for emails based on parameters such as data type and department preference, followed by automatic deletion. * * * ## The cost of anti-spam software Most products in the market are priced on a per user, per month basis and can be divided into three pricing tiers based on their starting price. **Price ranges\*:** - $3 - $7 - $7 - $26 - $26+ _\*The pricing included is for the entry-level/lowest-priced offering found on vendor websites on August 10, 2021. These ranges correspond to the 25th, 75th, and 100th percentiles of pricing information gathered from vendor websites of sample products._ The above list summarizes pricing for the base plans of most products. An enterprise or premium product that is priced higher may include additional features such as outbound scanning, SMTP controls, SURBL/URIBL filtering, greylisting, information archiving, and white labeling. * * * ## Considerations when purchasing anti-spam software Buyers need to keep the following points in mind when purchasing anti-spam software for their business: - **Features:** In addition to blocking spam messages and emails, anti-spam software can include advanced features such as clustering, rebranding, intrusion detection alerts, live monitoring of inbound and outbound emails, email encryption, and integration with an active directory. The cost of these tools also varies based on the number of users. It's important to determine your requirements before you start searching for an anti-spam solution to ensure you're paying for the functionality you need. - **Deployment options:** As you research anti-spam software, consider the pros and cons of deploying it via the cloud versus a private server. Typically, cloud deployment takes less time to get started and can have a lower cost than on-premise deployment. This choice will also depend on your existing software infrastructure and whether it supports cloud deployment.  * * * ## Relevant anti-spam software trends - **Artificial intelligence-enhanced spam filtering:** Anti-spam tools enhanced by machine learning and artificial intelligence facilitates stronger firewall support, immediate malware detection, recognition of the spam email's source, as well as automated whitelisting and blacklisting. Vendors such as [Google](https://www.yourictmagazine.com/apps-software/467-google-s-spam-filters-to-use-artificial-intelligence-ai-to-curb-those-annoying-spam-emails.html) are making spam filters more effective using artificial neural networks to detect and block spam, and identify personal preferences in organizing inboxes. * * * **Sources** Products evaluated for the pricing calculation were taken from Capterra’s [anti-spam software directory](https://www.capterra.com/anti-spam-software/). The pricing ranges exclude freemium versions of the products. The features highlighted were identified based on their relevance and the percentage of products in [Capterra’s directory](https://www.capterra.com/anti-spam-software/) that offer them.  The following source was used for this document:  1\. [How machine learning removes spam from your inbox](https://bdtechtalks.com/2020/11/30/machine-learning-spam-detection/) (Date accessed: August 10, 2021)