# Best Email Anti-spam Software ## How Many Email Anti-spam Software Products Does G2 Track? **Total Products under this Category:** 119 ### Category Stats (Jul 2026) - **Average Rating:** 4.46/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** INKY Email Security Platform (+0.86%) - Among all products in this category, INKY Email Security Platform recorded the largest rating increase compared to last month _Last updated: July 26, 2026_ ## How Does G2 Rank Email Anti-spam Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 5,400+ Authentic Reviews - 119+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Email Anti-spam Software ![G2 Grid® for Email Anti-spam Software plotting products by satisfaction and market presence](https://www.g2.com/categories/email-anti-spam/grids.png?focus%5B%5D=30562&focus%5B%5D=112257&focus%5B%5D=115555&focus%5B%5D=118732&focus%5B%5D=25519&focus%5B%5D=15605&focus%5B%5D=129100&focus%5B%5D=127324) Highlighted products: Proofpoint Core Email Protection, Check Point Email Security, Microsoft Defender for Office 365, Abnormal AI, Paubox, SaneBox, Libraesva Email Security, and IRONSCALES. Underlying data: [Grid® JSON](https://www.g2.com/categories/email-anti-spam/grids.json?focus%5B%5D=proofpoint-core-email-protection&focus%5B%5D=check-point-email-security&focus%5B%5D=microsoft-microsoft-defender-for-office-365&focus%5B%5D=abnormal-ai&focus%5B%5D=paubox&focus%5B%5D=sanebox&focus%5B%5D=libraesva-email-security&focus%5B%5D=ironscales) **Sponsored** ### Sublime Email Security Platform Sublime’s agentic platform stops more email attacks with less work. Our AI agents work like a digital SOC team in your environment, triaging and blocking advanced threats while adapting protections at adversary speed. It provides full transparency and automation by default, with control on demand for advanced teams, eliminating vendor bottlenecks or one-size-fits-all limits. Core Outcomes (The What): - Stop More Attacks with Fewer False Positives - block sophisticated threats (BEC, novel phishing, QR-based phishing) and reduce the false positives that waste time and disrupt workflows. Our tailored protections deliver a demonstrably higher catch rate, validated by the world's most demanding security teams. - Automate the Abuse Mailbox - Our Autonomous Security Analyst (ASA) automates triage, investigation, and remediation of user-reported email, cutting MTTR from hours to seconds and freeing your SOC team to focus on the threats that matter most. - Adapt Defenses Automatically. - When a missed attack is identified, we can create new coverage in hours. Our Autonomous Detection Engineer (ADÉ) generates, backtests, and deploys org-specific coverage, eliminating vendor ticket limbo. Differentiators (The How): - A Team of Agents using AI, Not Just a Black Box - Sublime deploys a team of specialized agents - like an analyst and a detection engineer - that use AI to protect, triage, and adapt your defenses. Unlike an opaque, monolithic AI, our agentic approach provides full transparency into every action, with visible decision history, message lineage, and backtests. - Org-Specific Protection, Not One-Size-Fits-All - Our Distributed Detection Model (DDM) is the foundation of our platform. It runs per-environment coverage that adapts to the unique attacks you face, allowing us to safely deploy protections that would be noisy in global models - something centralized systems simply can’t support. This means higher day-one efficacy and fewer false positives. - Autonomous by Default, Control on Demand - By stopping more attacks and reducing false positives, Sublime delivers a superior autonomous experience that requires less work. For advanced teams, the platform is fully extensible, allowing you to author your own detections and hunt for threats with a level of precision that one-size-fits-all solutions can't. Innovative organizations including Spotify, Snowflake, Brex, Elastic, Compass, Anduril, SentinelOne, and others rely on Sublime to secure the business and keep teams focused on strategic defense. 🔗 Learn how Sublime helps security teams stop more attacks with less work at sublime.security [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=paid_promo&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=1628&secure%5Bchosen_at%5D=2026-07-28T01%3A16%3A12Z&secure%5Bmedium%5D=sponsored&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=1417082&secure%5Bresource_id%5D=1628&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Femail-anti-spam&secure%5Btoken%5D=3d0b27a233ead497a2ced20851ca0a7b2bf8e7a16eb3994278b1b51273d193cf&secure%5Burl%5D=https%3A%2F%2Fsublime.security&secure%5Burl_type%5D=paid_promos) ### [Check Point Email Security](https://www.g2.com/products/check-point-email-security/reviews) Check Point Harmony Email & Collaboration, protects enterprise data by preventing targeted attacks on SaaS applications and cloud-based email. **Average Rating:** 4.6/5.0 **Total Reviews:** 487 #### How Do G2 Users Rate Check Point Email Security? - **Has the product been a good partner in doing business?:** 9.3/10 (Category avg: 9.2/10) - **Quality of Support:** 9.1/10 (Category avg: 9.0/10) - **Ease of Admin:** 9.3/10 (Category avg: 8.9/10) - **Ease of Use:** 9.2/10 (Category avg: 9.0/10) #### Who Is the Company Behind Check Point Email Security? - **Seller:** [Check Point Software Technologies](https://www.g2.com/sellers/check-point-software-technologies) - **Year Founded:** 1993 - **HQ Location:** Redwood City, CA - **Twitter:** @CheckPointSW (70,955 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/check-point-software-technologies/ (8,554 employees on LinkedIn®) - **Ownership:** NASDAQ:CHKP #### Who Uses This Product? - **Who Uses This:** IT Manager, Systems Administrator - **Top Industries:** Information Technology and Services, Computer & Network Security - **Company Size:** 57% Medium, 23% Large #### What Do G2 Reviewers Say About Check Point Email Security? _AI-generated summary from verified user reviews_ ##### Pros - Users appreciate the **robust email protection** of Check Point Email Security, effectively blocking phishing and malware threats. - Users value the **robust security** of Check Point Email Security, effectively blocking phishing attacks and ensuring peace of mind. - Users appreciate the **protection against phishing attacks** offered by Check Point Email Security, enhancing their email security and peace of mind. - Users find Check Point Email Security's **ease of use** outstanding, thanks to its intuitive interface and automated features. - Users enjoy the **peace of mind from robust phishing protection** , effectively blocking threats before reaching their inbox. ##### Cons - Users experience **false positives** , with safe emails marked as spam, impacting important communications and usability. - Users find the **initial setup complexity** and high total ownership cost frustrating compared to other email security solutions. - Users find the **complex setup** of Check Point Email Security cumbersome, impacting integration and overall experience. - Users note the **limited features** of Check Point Email Security, notably in supported platforms and configuration options. - Users face significant **configuration difficulties** with Check Point Email Security, leading to a frustrating onboarding experience. #### What Are Recent G2 Reviews of Check Point Email Security? **["Accuracy Redefined, Perfect for Email Security"](https://www.g2.com/survey_responses/check-point-email-security-review-12713186)** **Rating:** 5.0/5.0 stars _— Jared R._ [Read full review](https://www.g2.com/survey_responses/check-point-email-security-review-12713186) **["Effortless Email Security with Minor Filtering Hiccups"](https://www.g2.com/survey_responses/check-point-email-security-review-11882522)** **Rating:** 4.5/5.0 stars _— Leo D._ [Read full review](https://www.g2.com/survey_responses/check-point-email-security-review-11882522) ### [Microsoft Defender for Office 365](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews) Microsoft Defender for Office 365 is a comprehensive security solution designed to protect organizations from advanced threats targeting email and collaboration tools within the Microsoft 365 environment. It offers robust protection against phishing, malware, and business email compromise, ensuring secure communication and collaboration across platforms like Exchange Online, Microsoft Teams, SharePoint, and OneDrive. Key Features and Functionality: - Safe Attachments: Scans email attachments in a secure environment to detect and block malicious content before it reaches users. - Safe Links: Provides real-time protection by analyzing URLs at the time of click, safeguarding users from malicious links. - Anti-Phishing Policies: Utilizes advanced algorithms and machine learning to identify and mitigate phishing attempts, including those involving domain impersonation. - Protection for Collaboration Tools: Extends security measures to Microsoft Teams, SharePoint, and OneDrive, ensuring safe file sharing and collaboration. - Automated Investigation and Response (AIR): Automates threat investigation processes, enabling swift identification and remediation of security incidents. - Attack Simulation Training: Offers tools to simulate phishing attacks, helping organizations educate employees and strengthen their security posture. Primary Value and Problem Solved: Microsoft Defender for Office 365 addresses the critical need for advanced threat protection in today's digital workplace. By integrating seamlessly with Microsoft 365 applications, it provides a unified defense against sophisticated cyber threats, reducing the risk of data breaches and ensuring business continuity. Its comprehensive approach not only safeguards email communications but also secures collaborative platforms, enabling organizations to operate confidently in a secure environment. **Average Rating:** 4.5/5.0 **Total Reviews:** 283 #### How Do G2 Users Rate Microsoft Defender for Office 365? - **Has the product been a good partner in doing business?:** 8.8/10 (Category avg: 9.2/10) - **Quality of Support:** 8.7/10 (Category avg: 9.0/10) - **Ease of Admin:** 8.9/10 (Category avg: 8.9/10) - **Ease of Use:** 8.9/10 (Category avg: 9.0/10) #### Who Is the Company Behind Microsoft Defender for Office 365? - **Seller:** [Microsoft](https://www.g2.com/sellers/microsoft) - **Year Founded:** 1975 - **HQ Location:** Redmond, Washington - **Twitter:** @microsoft (13,091,739 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/microsoft/ (231,632 employees on LinkedIn®) - **Ownership:** MSFT #### Who Uses This Product? - **Who Uses This:** Software Engineer, Associate Software Engineer - **Top Industries:** Information Technology and Services, Computer Software - **Company Size:** 39% Large, 37% Medium #### What Do G2 Reviewers Say About Microsoft Defender for Office 365? _AI-generated summary from verified user reviews_ ##### Pros - Users appreciate the **ease of use** of Microsoft Defender for Office 365, benefiting from its seamless integration within the Microsoft ecosystem. - Users value **proactive threat protection** in Microsoft Defender for Office 365, blocking threats seamlessly and enhancing their security experience. - Users value the **proactive threat protection** of Microsoft Defender for Office 365, ensuring robust security and seamless workflow. - Users appreciate the **seamless Office 365 integration** of Microsoft Defender for Office 365, enhancing security without disrupting their workflow. - Users value the **seamless integration** of Microsoft Defender for Office 365 with Microsoft 365, enhancing security efficiency and effectiveness. ##### Cons - Users experience frustration due to the **complexity** of configuration and policy management, hindering efficient use. - Users find the **false positives** from Microsoft Defender for Office 365 disrupt workflows and complicate alert management. - Users face **configuration difficulties** with Microsoft Defender for Office 365, finding it overwhelming for newcomers and administrators. - Users face challenges with **limited reporting** due to its complexity and lack of intuitive insights during investigations. - Users criticize the **poor detection** abilities of Microsoft Defender for Office 365, leading to noise in alerting and disrupted workflows. #### What Are Recent G2 Reviews of Microsoft Defender for Office 365? **["Effective Email Security with Excellent Microsoft 365 Integration"](https://www.g2.com/survey_responses/microsoft-defender-for-office-365-review-12933331)** **Rating:** 4.5/5.0 stars _— Aravinda S._ [Read full review](https://www.g2.com/survey_responses/microsoft-defender-for-office-365-review-12933331) **["Built-In Defender Policies Strengthen Office 365 Security"](https://www.g2.com/survey_responses/microsoft-defender-for-office-365-review-12958457)** **Rating:** 4.0/5.0 stars _— Adesh T._ [Read full review](https://www.g2.com/survey_responses/microsoft-defender-for-office-365-review-12958457) ### [Paubox](https://www.g2.com/products/paubox/reviews) Paubox is a HIPAA compliant email security platform designed for healthcare organizations. It provides outbound email encryption and AI-powered inbound email protection, helping organizations safeguard protected health information (PHI) without changing how staff or patients use email. Email remains a critical communication tool in healthcare, but standard platforms like Google Workspace and Microsoft 365 are not HIPAA compliant on their own. Paubox makes compliance automatic and enhances security to defend against evolving phishing and malware attacks, all while maintaining a seamless user experience. Paubox serves small to mid-sized healthcare organizations, clinics, and IT teams seeking reliable compliance, reduced risk, and simple management. Key capabilities: - Automatic outbound encryption: Every message is encrypted by default; recipients read emails directly in their inbox, without portals or passwords - AI-powered inbound email security: Detects and blocks phishing, spoofing, and malware using generative AI analysis - Seamless integration: Works with Google Workspace, Microsoft 365, and Microsoft Exchange without new workflows or domain changes - Compliance and control: Supports HIPAA compliance and minimizes human error in handling PHI - Additional tools: Archiving, Data Loss Prevention, Paubox Email API, and Paubox Marketing Benefits: - Simplifies compliance management and reduces IT workload - Improves patient and staff experience with frictionless secure email - Strengthens protection against modern email threats Paubox enables healthcare organizations to confidently use email as a secure, compliant, and user-friendly communication channel, eliminating guesswork for staff and helping IT teams protect against data breaches and compliance risk. **Average Rating:** 4.9/5.0 **Total Reviews:** 598 #### How Do G2 Users Rate Paubox? - **Has the product been a good partner in doing business?:** 9.8/10 (Category avg: 9.2/10) - **Quality of Support:** 9.8/10 (Category avg: 9.0/10) - **Ease of Admin:** 9.6/10 (Category avg: 8.9/10) - **Ease of Use:** 9.7/10 (Category avg: 9.0/10) #### Who Is the Company Behind Paubox? - **Seller:** [Paubox](https://www.g2.com/sellers/paubox) - **Year Founded:** 2015 - **HQ Location:** San Francisco, CA - **Twitter:** @PauboxHQ (16,577 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/4821384/ (46 employees on LinkedIn®) #### Who Uses This Product? - **Who Uses This:** Owner, CEO - **Top Industries:** Mental Health Care, Hospital & Health Care - **Company Size:** 84% Small, 14% Medium #### What Do G2 Reviewers Say About Paubox? _AI-generated summary from verified user reviews_ ##### Pros - Users love the **ease of use** of Paubox, appreciating its seamless setup and management for secure communications. - Users appreciate the **security of Paubox** , ensuring HIPAA compliance and peace of mind when handling sensitive information. - Users praise the **exceptional customer support** from Paubox, highlighting helpful and patient staff throughout the implementation process. - Users trust **Paubox's email security** , appreciating its ease of use and reliable HIPAA compliance for peace of mind. - Users value the **effortless setup process** of Paubox, appreciating its quick initiation and seamless operations. ##### Cons - Users find Paubox **expensive** , but some feel the value justifies the higher cost compared to alternatives. - Users note **email retention issues** with Paubox, citing the need for longer access to email records for litigation. - Users find the **difficult setup** challenging, though quick support helps to alleviate some of the confusion. - Users experience **email encryption issues** with Paubox, causing delays and reliance on test emails for assurance. - Users miss the **encrypted SMS feature** of Paubox, feeling it was unmatched in the market. #### What Are Recent G2 Reviews of Paubox? **["HIPAA-Compliant Email Encryption without friction"](https://www.g2.com/survey_responses/paubox-review-13114802)** **Rating:** 5.0/5.0 stars _— Cyril B._ [Read full review](https://www.g2.com/survey_responses/paubox-review-13114802) **["Easy email encryption that runs on your existing email platform"](https://www.g2.com/survey_responses/paubox-review-9371578)** **Rating:** 5.0/5.0 stars _— Mia J._ [Read full review](https://www.g2.com/survey_responses/paubox-review-9371578) - ‹ Prev‹ Prev - 1 - [2](/categories/email-anti-spam?order=g2_score&page=2#product-list) - [3](/categories/email-anti-spam?order=g2_score&page=3#product-list) - [4](/categories/email-anti-spam?order=g2_score&page=4#product-list) - [5](/categories/email-anti-spam?order=g2_score&page=5#product-list) - … - [7](/categories/email-anti-spam?order=g2_score&page=7#product-list) - [8](/categories/email-anti-spam?order=g2_score&page=8#product-list) - [Next ›Next ›](/categories/email-anti-spam?order=g2_score&page=2#product-list) Spotlight Categories [Analytics Platforms](https://www.g2.com/categories/analytics-platforms) [Corporate Performance Management (CPM) Software](https://www.g2.com/categories/corporate-performance-management-cpm) [Bot Platforms Software](https://www.g2.com/categories/bot-platforms) [Employer of Record (EOR) Software](https://www.g2.com/categories/employer-of-record-eor) [Sales Training and Onboarding Software](https://www.g2.com/categories/sales-training-and-onboarding) Similar Categories - [Secure Email Gateway](/categories/secure-email-gateway) - [Cloud Email Security](/categories/cloud-email-security) - [Email Encryption](/categories/email-encryption) - [Intelligent Email Protection](/categories/intelligent-email-protection) [Browse Email Anti-spam Themes](/categories/email-anti-spam/themes) ![Lauren Worth](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Lauren Worth") LW Researched and written by [Lauren Worth](https://research.g2.com/insights/author/lauren-worth) Updated October 3, 2024 Email anti-spam technology is used to prevent malicious content from being delivered via email. These tools scan email messages, content, and attachments for potential threats and then filter or block suspicious messages from being delivered. Administrators can whitelist approved content or senders while also blacklisting or blocking communications from suspicious parties. Companies use email anti-spam tools to prevent their employees from being misled through phishing attacks or compromising local networks when downloading malware. They also prevent employees from delivering information to misidentified users, saving the business from potential breaches. All [secure email gateway software](https://www.g2.com/categories/secure-email-gateway) possesses anti-spam or email filtering capabilities, but those tools also have additional features for comprehensive spam filtering, email encryption, and information archiving. To qualify for inclusion in the Email Anti-Spam category, a product must: - Filter email content for malware or viruses - Identify mislabeled senders or potential phishing attempts - Provide blacklisting or blocking capabilities to restrict communication with suspicious parties Top Tools at a Glance | | Perimeter spam and phishing filtering with post-delivery remediation | User Review "Robust Email Security with Some Rule Management Hurdles" | | | API-inline phishing prevention for Microsoft 365 | User Review "Accuracy Redefined, Perfect for Email Security" | | | Microsoft 365-native phishing and email threat defense | User Review "Effective Email Security with Excellent Microsoft 365 Integration" | | | API-native BEC and phishing auto-remediation | User Review "Flawless Protection with Insightful Reporting" | | | Frictionless inbound filtering with automatic outbound encryption | User Review "Easy email encryption that runs on your existing email platform" | | | Sender-trained inbox triage and spam quarantine | User Review "SaneBox Transformed My Email Management" | | | Low-false-positive email threat filtering with M365 | User Review "Excellent Email Security, Excellent Technical Support" | | | Microsoft 365-native email filtering with unified backup | User Review "Multi-Tenant Time Saver with Reliable Anti-Spam and Smooth Microsoft 365 Integration" | | | AI-automated phishing detection with inbox remediation | User Review "Advanced AI Protection and Realistic Phishing Training That Truly Improves Behavior" | | | Automated DMARC enforcement and spoofing prevention | User Review "Valimail: Essential for Email Security and Confidence" | * * * Show More