# Top Free Cloud Email Security Solutions ## How Many Cloud Email Security Solutions Products Does G2 Track? **Total Products under this Category:** 85 ### Category Stats (Jul 2026) - **Average Rating:** 4.5/5 (↓0.01 vs Jun 2026) The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Mailinblack (+0.73%) - Among all products in this category, Mailinblack recorded the largest rating increase compared to last month _Last updated: July 24, 2026_ ## How Does G2 Rank Cloud Email Security Solutions Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 7,000+ Authentic Reviews - 85+ 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. [ Barracuda Email Protection ](https://www.g2.com/products/barracuda-barracuda-email-protection/reviews) By [Barracuda](https://www.g2.com/sellers/barracuda) [ 4.4/5(103) ](https://www.g2.com/products/barracuda-barracuda-email-protection/reviews) What do users say? Users consistently praise the product for its ease of use and effective spam filtering, which significantly enhances email security without disrupting workflow. The intuitive interface and seamless in Pros and Cons [ Ease of Use (51) ](https://www.g2.com/products/barracuda-barracuda-email-protection/reviews?qs=pros-and-cons)[ Email Filtering Issues (19) ](https://www.g2.com/products/barracuda-barracuda-email-protection/reviews?qs=pros-and-cons) [ Proofpoint Core Email... ](https://www.g2.com/products/proofpoint-core-email-protection/reviews) By [Proofpoint](https://www.g2.com/sellers/proofpoint) [ 4.6/5(601) ](https://www.g2.com/products/proofpoint-core-email-protection/reviews) What do users say? Users consistently praise the product for its advanced threat detection and robust phishing protection, which effectively blocks malicious emails before they reach users. The intuitive interface and d Pros and Cons [ Effective (52) ](https://www.g2.com/products/proofpoint-core-email-protection/reviews?qs=pros-and-cons)[ Poor Customer Support (19) ](https://www.g2.com/products/proofpoint-core-email-protection/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. [ Learn More ](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) [ Paubox ](https://www.g2.com/products/paubox/reviews) By [Paubox](https://www.g2.com/sellers/paubox) [ 4.9/5(602) ](https://www.g2.com/products/paubox/reviews) What do users say? Users consistently praise the product for its seamless integration with existing email systems, allowing for automatic encryption without extra steps for recipients. This simplicity enhances user expe Pros and Cons [ Ease of Use (216) ](https://www.g2.com/products/paubox/reviews?qs=pros-and-cons)[ Expensive (50) ](https://www.g2.com/products/paubox/reviews?qs=pros-and-cons) [ Coro Cybersecurity ](https://www.g2.com/products/coro-cybersecurity/reviews) By [Coronet](https://www.g2.com/sellers/coronet) [ 4.7/5(232) ](https://www.g2.com/products/coro-cybersecurity/reviews) What do users say? Users consistently praise the product for its ease of use and responsive support, highlighting how quickly it can be set up and integrated into existing systems. Many appreciate the comprehensive prot Pros and Cons [ Ease of Use (99) ](https://www.g2.com/products/coro-cybersecurity/reviews?qs=pros-and-cons)[ Performance Issues (32) ](https://www.g2.com/products/coro-cybersecurity/reviews?qs=pros-and-cons) [ Abnormal AI ](https://www.g2.com/products/abnormal-ai/reviews) By [Abnormal AI](https://www.g2.com/sellers/abnormal-ai) [ 4.8/5(78) ](https://www.g2.com/products/abnormal-ai/reviews) What do users say? Users consistently praise the product for its ease of use and effective email filtering, which significantly reduces spam and phishing threats. Many appreciate how quickly it integrates into existing Pros and Cons [ Ease of Use (15) ](https://www.g2.com/products/abnormal-ai/reviews?qs=pros-and-cons)[ Email Filtering Issues (3) ](https://www.g2.com/products/abnormal-ai/reviews?qs=pros-and-cons) [ Guardz ](https://www.g2.com/products/guardz/reviews) By [Guardz](https://www.g2.com/sellers/guardz) [ 4.6/5(120) ](https://www.g2.com/products/guardz/reviews) What do users say? Users consistently praise Guardz for its centralized dashboard that simplifies cybersecurity management across multiple clients. The platform's ease of use and comprehensive features allow MSPs to eff Pros and Cons [ Ease of Use (58) ](https://www.g2.com/products/guardz/reviews?qs=pros-and-cons)[ Limited Features (13) ](https://www.g2.com/products/guardz/reviews?qs=pros-and-cons) [ Mimecast Advanced Email... ](https://www.g2.com/products/mimecast-advanced-email-security/reviews) By [Mimecast](https://www.g2.com/sellers/mimecast) [ 4.4/5(320) ](https://www.g2.com/products/mimecast-advanced-email-security/reviews) What do users say? Users consistently praise the product for its strong protection against phishing and malware, highlighting its ease of use and intuitive interface that simplifies management tasks. Many appreciate the Pros and Cons [ Email Security (40) ](https://www.g2.com/products/mimecast-advanced-email-security/reviews?qs=pros-and-cons)[ Complexity (17) ](https://www.g2.com/products/mimecast-advanced-email-security/reviews?qs=pros-and-cons) [ Hornetsecurity 365 Total... ](https://www.g2.com/products/hornetsecurity-365-total-protection/reviews) By [Hornetsecurity](https://www.g2.com/sellers/hornetsecurity) [ 4.6/5(65) ](https://www.g2.com/products/hornetsecurity-365-total-protection/reviews) What do users say? Users consistently praise the product for its reliable security and easy integration with Microsoft 365, which significantly reduces spam and phishing threats. The intuitive interface and comprehensiv Pros and Cons [ Email Security (7) ](https://www.g2.com/products/hornetsecurity-365-total-protection/reviews?qs=pros-and-cons)[ User Interface (3) ](https://www.g2.com/products/hornetsecurity-365-total-protection/reviews?qs=pros-and-cons) [ IRONSCALES ](https://www.g2.com/products/ironscales/reviews) By [IRONSCALES](https://www.g2.com/sellers/ironscales) [ 4.7/5(65) ](https://www.g2.com/products/ironscales/reviews) What do users say? Users consistently praise the product for its ease of use and effective phishing protection, noting that it simplifies email security management and empowers users to report suspicious emails quickly. Pros and Cons [ Ease of Use (16) ](https://www.g2.com/products/ironscales/reviews?qs=pros-and-cons)[ False Positives (6) ](https://www.g2.com/products/ironscales/reviews?qs=pros-and-cons) [ Libraesva Email Security ](https://www.g2.com/products/libraesva-email-security/reviews) By [Libraesva](https://www.g2.com/sellers/libraesva) [ 4.8/5(109) ](https://www.g2.com/products/libraesva-email-security/reviews) What do users say? Users consistently praise the product for its reliable threat detection and ease of use, highlighting its effectiveness in blocking spam and phishing attempts while maintaining a low rate of false pos Pros and Cons [ Ease of Use (35) ](https://www.g2.com/products/libraesva-email-security/reviews?qs=pros-and-cons)[ Complexity (8) ](https://www.g2.com/products/libraesva-email-security/reviews?qs=pros-and-cons) [ Valimail ](https://www.g2.com/products/valimail/reviews) By [Valimail](https://www.g2.com/sellers/valimail) [ 4.5/5(459) ](https://www.g2.com/products/valimail/reviews) What do users say? Users consistently praise Valimail for its ease of use and intuitive reporting, which simplifies DMARC management and enhances email security. The straightforward setup process and effective monitorin Pros and Cons [ Ease of Use (70) ](https://www.g2.com/products/valimail/reviews?qs=pros-and-cons)[ Expensive (15) ](https://www.g2.com/products/valimail/reviews?qs=pros-and-cons) [ Barracuda Impersonation... ](https://www.g2.com/products/barracuda-impersonation-protection/reviews) By [Barracuda](https://www.g2.com/sellers/barracuda) [ 4.5/5(87) ](https://www.g2.com/products/barracuda-impersonation-protection/reviews) What do users say? Users consistently praise the product for its high detection efficacy and ease of use, noting that it effectively blocks impersonation emails before they reach inboxes. Many appreciate the proactive m Pros and Cons [ Phishing Protection (8) ](https://www.g2.com/products/barracuda-impersonation-protection/reviews?qs=pros-and-cons)[ False Positives (8) ](https://www.g2.com/products/barracuda-impersonation-protection/reviews?qs=pros-and-cons) [ Sublime Email Security... ](https://www.g2.com/products/sublime-email-security-platform/reviews) By [Sublime Security](https://www.g2.com/sellers/sublime-security) [ 4.9/5(27) ](https://www.g2.com/products/sublime-email-security-platform/reviews) What do users say? Users consistently praise the platform for its ease of use and reliable detection capabilities, noting that it quickly filters out threats with minimal setup. The intuitive interface and strong custom Pros and Cons [ Ease of Use (15) ](https://www.g2.com/products/sublime-email-security-platform/reviews?qs=pros-and-cons)[ Missing Features (5) ](https://www.g2.com/products/sublime-email-security-platform/reviews?qs=pros-and-cons) [ Cloudflare One (SASE) ](https://www.g2.com/products/cloudflare-one-sase/reviews) By [Cloudflare, Inc.](https://www.g2.com/sellers/cloudflare-inc) [ 4.6/5(105) ](https://www.g2.com/products/cloudflare-one-sase/reviews) What do users say? Users consistently praise the intuitive interface and ease of setup of the Cloudflare SSE & SASE Platform, highlighting how it simplifies security management across various tools. The platform's a Pros and Cons [ Ease of Use (8) ](https://www.g2.com/products/cloudflare-one-sase/reviews?qs=pros-and-cons)[ Steep Learning Curve (5) ](https://www.g2.com/products/cloudflare-one-sase/reviews?qs=pros-and-cons) [ KnowBe4 Cloud Email... ](https://www.g2.com/products/knowbe4-cloud-email-security-formerly-egress/reviews) By [KnowBe4, Inc.](https://www.g2.com/sellers/knowbe4-inc) [ 4.5/5(74) ](https://www.g2.com/products/knowbe4-cloud-email-security-formerly-egress/reviews) What do users say? Users consistently praise the product for its ease of use and effective email security, highlighting features like visual risk indicators and seamless integration with Outlook. Many appreciate how it Pros and Cons [ Email Security (7) ](https://www.g2.com/products/knowbe4-cloud-email-security-formerly-egress/reviews?qs=pros-and-cons)[ Dashboard Issues (2) ](https://www.g2.com/products/knowbe4-cloud-email-security-formerly-egress/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. [ Learn More ](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) - ‹ Prev‹ Prev - 1 - [2](/categories/cloud-email-security/free?order=g2_score&page=2#product-list) - [3](/categories/cloud-email-security/free?order=g2_score&page=3#product-list) - [Next ›Next ›](/categories/cloud-email-security/free?order=g2_score&page=2#product-list) Spotlight Categories [Field Service Management Software](https://www.g2.com/categories/field-service-management) [Sales Performance Management Software](https://www.g2.com/categories/sales-performance-management) [Auto Dialer Software](https://www.g2.com/categories/auto-dialer) [Influencer Marketing Platforms](https://www.g2.com/categories/influencer-marketing-platforms) [Inbound Call Tracking Software](https://www.g2.com/categories/inbound-call-tracking) Similar Categories - [Secure Email Gateway](/categories/secure-email-gateway) - [Email Anti-spam](/categories/email-anti-spam) - [Email Encryption](/categories/email-encryption) - [Intelligent Email Protection](/categories/intelligent-email-protection) [Browse Cloud Email Security Themes](/categories/cloud-email-security/themes)