Top Free Cloud Email Security Solutions - Page 3

How Many Cloud Email Security Solutions Products Does G2 Track?

Total Products under this Category: 98

Category Stats (Sep 2026)

  • Average Rating: 4.51/5 (↑0.01 vs Aug 2026) The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: INKY Email Security Platform (+3.76%) - Among all products in this category, INKY Email Security Platform recorded the largest rating increase compared to last month

Last updated: September 01, 2026

How Does G2 Rank Cloud Email Security Solutions Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 7,400+ Authentic Reviews
  • 98+ 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 Cloud Email Security Solutions

G2 Grid® for Cloud Email Security Solutions plotting products by satisfaction and market presence

Highlighted products: Acronis Cyber Protect Cloud, Barracuda Email Protection, Check Point Email Security, Paubox, Proofpoint Core Email Protection, Valimail, Abnormal AI, and Guardz.

Underlying data: [Grid® JSON](https://www.g2.com/categories/cloud-email-security/grids.json?focus%5B%5D=acronis-cyber-protect-cloud&focus%5B%5D=barracuda-barracuda-email-protection&focus%5B%5D=check-point-email-security&focus%5B%5D=paubox&focus%5B%5D=proofpoint-core-email-protection&focus%5B%5D=valimail&focus%5B%5D=abnormal-ai&focus%5B%5D=guardz)

OpenText Core Email Threat Protection

OpenText Core Email Threat Protection is a cloud-based email security solution that stops phishing, ransomware, malware, and business email compromise before they reach users. It uses real-time threat intelligence, AI-driven detection, and multi-layered filtering to block both known and unknown threats across inbound and outbound email. Suspicious messages are automatically analyzed, quarantined, or removed, reducing the risk of breaches and user exposure. Key benefits: Stops advanced threats early – phishing, malware, ransomware, and zero-day attacks AI-driven detection – identifies evolving and unknown threats in real time Protects users and data – prevents credential theft and account compromise Automated response – quarantine, remediation, and policy enforcement Cloud-native and easy to deploy – no hardware, minimal setup Built for Microsoft 365 and Google Workspace We remove email as the primary attack vector and gives IT teams strong, automated protection without added complexity.

Average Rating: 3.4/5.0

Total Reviews: 6

How Do G2 Users Rate OpenText Core Email Threat Protection?

  • Has the product been a good partner in doing business?: 8.8/10 (Category avg: 9.3/10)
  • Advanced Threat Protection (ATP): 2.5/10 (Category avg: 9.0/10)
  • Anti-Phishing: 6.7/10 (Category avg: 9.2/10)
  • Quarantine: 9.4/10 (Category avg: 9.0/10)

Who Is the Company Behind OpenText Core Email Threat Protection?

  • Seller: OpenText
  • Year Founded: 1991
  • HQ Location: Waterloo, ON
  • Twitter: @OpenText
    21,565 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    22,835 employees on LinkedIn®
  • Ownership: NASDAQ:OTEX

Who Uses This Product?

  • Company Size: 83% Medium, 17% Small

What Do G2 Reviewers Say About OpenText Core Email Threat Protection?

AI-generated summary from verified user reviews

Cons
  • Users struggle with email filtering issues, as the system fails to catch obvious phishing attempts effectively.
  • Users find the limited reporting features inadequate, struggling to catch obvious phishing emails effectively.
  • Users report poor customer support and ineffective email filtering that fails to catch obvious phishing attempts.
  • Users experience slow performance with OpenText Core Email Threat Protection, facing ineffective filtering for phishing attempts.

What Are Recent G2 Reviews of OpenText Core Email Threat Protection?

What Are G2 Users Discussing About OpenText Core Email Threat Protection?

Perception Point

Our Advanced Email Security combines cutting edge threat prevention with the speed, scale and flexibility of the cloud. We’ve built in multiple scanning engines and threat intelligence for enhanced protection against known attacks like phishing, spam and commodity malware. For advanced threats, we’ve invented the first technology to combine hardware visibility with software agility to see what leading solutions miss. Propriety software algorithms x-ray code at the CPU-level to intercept attacks at the earliest stage possible - the exploit - before malware is even delivered. Our cyber security as a service deploys in a single click, analyzes up to 60x faster* and has limitless scale to always scan 100% of your traffic

Average Rating: 4.8/5.0

Total Reviews: 5

How Do G2 Users Rate Perception Point?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 9.3/10)
  • Advanced Threat Protection (ATP): 10.0/10 (Category avg: 9.0/10)
  • Anti-Phishing: 10.0/10 (Category avg: 9.2/10)
  • Quarantine: 10.0/10 (Category avg: 9.0/10)

Who Is the Company Behind Perception Point?

  • Seller: Perception Point
  • Year Founded: 2015
  • HQ Location: Tel Aviv, Central
  • Twitter: @perceptionpo1nt
    2,961 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    132 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 83% Small, 17% Medium

What Are Recent G2 Reviews of Perception Point?

What Are G2 Users Discussing About Perception Point?

Seclore Data-Centric Security Platform

Seclore is the 𝗗𝗮𝘁𝗮 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝗰𝗲 company for the era of enterprise AI. Its 𝗔𝗥𝗠𝗢𝗥 platform gives organizations a working view of what their data is, where it lives, how it moves, and how people and AI systems use it, then acts on that understanding by attaching protection to the data itself. Security travels with the file across endpoints, email, cloud repositories, partner networks, and AI pipelines, so control holds wherever the data goes. ARMOR operates as one loop of 𝗱𝗶𝘀𝗰𝗼𝘃𝗲𝗿𝘆, 𝗰𝗼𝗻𝘁𝗲𝘅𝘁, 𝗲𝗻𝗳𝗼𝗿𝗰𝗲𝗺𝗲𝗻𝘁, 𝗮𝗻𝗱 𝗽𝗿𝗼𝗼𝗳, replacing a stack of point tools with a single control model. • 𝗔𝗜-𝗻𝗮𝘁𝗶𝘃𝗲 𝗱𝗶𝘀𝗰𝗼𝘃𝗲𝗿𝘆 reads content, context, and intent across on-premises and cloud repositories, producing classified, risk-prioritized results without a training period or pre-seeded document sets. • 𝗣𝗲𝗿𝘀𝗶𝘀𝘁𝗲𝗻𝘁 𝗲𝗻𝗳𝗼𝗿𝗰𝗲𝗺𝗲𝗻𝘁 binds usage controls to the file, masks sensitive values before they reach an AI model, and lets teams adjust or revoke access after sharing. • 𝗖𝗼𝗻𝘁𝗶𝗻𝘂𝗼𝘂𝘀 𝗽𝗿𝗼𝗼𝗳 turns platform telemetry into audit trails and regulation-specific evidence for frameworks such as GDPR, PDPL, DPDP, HIPAA, and CCPA. Seclore deploys 𝗼𝗻-𝗽𝗿𝗲𝗺𝗶𝘀𝗲𝘀, 𝗶𝗻 𝗽𝗿𝗶𝘃𝗮𝘁𝗲 𝗰𝗹𝗼𝘂𝗱, 𝗼𝗿 𝗵𝗼𝘀𝘁𝗲𝗱, 𝘄𝗶𝘁𝗵 𝘀𝗲𝗹𝗳-𝗵𝗼𝘀𝘁𝗲𝗱 𝗔𝗜 𝗺𝗼𝗱𝗲𝗹𝘀 for organizations working under data localization requirements.

Average Rating: 4.6/5.0

Total Reviews: 15

How Do G2 Users Rate Seclore Data-Centric Security Platform?

  • Has the product been a good partner in doing business?: 9.3/10 (Category avg: 9.3/10)
  • Advanced Threat Protection (ATP): 9.2/10 (Category avg: 9.0/10)
  • Anti-Phishing: 8.3/10 (Category avg: 9.2/10)
  • Quarantine: 8.3/10 (Category avg: 9.0/10)

Who Is the Company Behind Seclore Data-Centric Security Platform?

  • Seller: Seclore
  • Year Founded: 2011
  • HQ Location: Santa Clara, US
  • Twitter: @secloretech
    1,267 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    492 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 56% Large, 44% Medium

What Do G2 Reviewers Say About Seclore Data-Centric Security Platform?

AI-generated summary from verified user reviews

Pros
  • Users value the individual permission levels for documents, ensuring security and tracking access effectively.
  • Users value the customization options in Seclore, allowing tailored document security and detailed access tracking.
  • Users value the data protection capabilities of Seclore, allowing secure, customizable access to documents and insightful tracking.
  • Users value the individual permission levels for document security and access tracking in Seclore's platform.
  • Users value the individual permission levels that enhance document security and access tracking in Seclore.
Cons
  • Users often face access issues that hinder functionality and require frequent troubleshooting with various systems and email providers.
  • Users often face access limitations, experiencing troubleshooting issues with system compatibility and email providers.
  • Users often face frequent troubleshooting with access, as it lacks usability and compatibility with various systems and email providers.
  • Users find access restrictions frustrating due to frequent troubleshooting and lack of user-friendliness with various systems.
  • Users often face authentication issues requiring frequent troubleshooting, impacting system compatibility and user experience.

What Are Recent G2 Reviews of Seclore Data-Centric Security Platform?

What Are G2 Users Discussing About Seclore Data-Centric Security Platform?

TrustLayer Email Security

Ultra-modern multi-layered email security for your entire organisation from known, unknown and emerging email security threats. Stop large-scale phishing, targeted attacks, CEO fraud and malware in their tracks with a comprehensive, cloud email security solution.

Average Rating: 4.9/5.0

Total Reviews: 5

How Do G2 Users Rate TrustLayer Email Security?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 9.3/10)
  • Anti-Phishing: 10.0/10 (Category avg: 9.2/10)
  • Quarantine: 10.0/10 (Category avg: 9.0/10)

Who Is the Company Behind TrustLayer Email Security?

  • Seller: TrustLayer
  • Year Founded: 2015
  • HQ Location: Basingstoke, England
  • LinkedIn® Page: www.linkedin.com
    44 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of TrustLayer Email Security?

Mailinblack

Expert en cybersécurité depuis 22 ans, Mailinblack protège aujourd'hui plus de 24 000 clients, couvrant les segments TPE, PME, ETI et grands comptes. Notre approche globale sécurise les infrastructures critiques tout en adressant le facteur humain, à l'origine de 90 % des cyberattaques réussies. 𝗡𝗼𝘀 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 : • Protect (Protection de messagerie) : Filtrage des flux entrants pour neutraliser le phishing, le ransomware et le spearphishing. La solution utilise des modèles de deep learning pour l'analyse des emails et intègre la technologie Secure Link pour sécuriser la navigation des utilisateurs lors du clic sur des liens externes. • Sikker (Gestionnaire de mots de passe) : Coffre-fort numérique professionnel certifié EN17640. Basé sur une architecture zero-knowledge (chiffrement AES-256 et Argon2), Sikker permet une gestion centralisée des accès, le partage sécurisé via liens chiffrés et l'audit continu de la solidité des identifiants au sein de l'organisation. • Cyber Coach (Simulation d'attaques) : Outil de diagnostic du risque humain permettant de simuler des campagnes de phishing et de ransomware. Avec plus de 1000 scénarios réalistes, la solution identifie les vulnérabilités comportementales et déclenche des actions correctives immédiates. • Cyber Academy (Plateforme d'e-learning) : Plateforme de sensibilisation continue s'appuyant sur le micro-learning. Elle permet aux administrateurs de piloter la progression des collaborateurs et de mesurer la réduction effective du risque cyber via un cockpit de reporting dédié. 𝐄𝐧𝐠𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐞𝐭 𝐬𝐨𝐮𝐯𝐞𝐫𝐚𝐢𝐧𝐞𝐭é: Mailinblack garantit une souveraineté totale avec un hébergement des données exclusivement en France. Nos solutions SaaS sont conçues pour une intégration rapide et un pilotage centralisé, répondant aux exigences de conformité et de performance des décideurs IT.

Average Rating: 4.7/5.0

Total Reviews: 9

How Do G2 Users Rate Mailinblack?

  • Has the product been a good partner in doing business?: 9.2/10 (Category avg: 9.3/10)
  • Advanced Threat Protection (ATP): 10.0/10 (Category avg: 9.0/10)
  • Anti-Phishing: 10.0/10 (Category avg: 9.2/10)
  • Quarantine: 10.0/10 (Category avg: 9.0/10)

Who Is the Company Behind Mailinblack?

  • Seller: Mailinblack
  • Year Founded: 2003
  • HQ Location: MARSEILLE 02, FR
  • Twitter: @mailinblack_fr
    1,083 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    134 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 44% Small, 22% Medium

What Are Recent G2 Reviews of Mailinblack?

Halon Protect

Halon is a global email infrastructure company focusing on empowering service providers to control and maximize email, the world’s most important means of digital communication. Established in 2010, our solutions are deployed worldwide, and process billions of emails daily. Halon Protect is for service providers who require carrier-grade mailbox performance and protection. Halon Protect provides best-in-class, cloud-ready email infrastructure built to optimize customer email experience while greatly reducing overall operation cost. By partnering with Halon, you gain access to world-class support and a platform that not only meets current demands but also evolves with changing standards and technologies, guaranteeing not just success, but exceptional success.

Average Rating: 5.0/5.0

Total Reviews: 5

How Do G2 Users Rate Halon Protect?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 9.3/10)

Who Is the Company Behind Halon Protect?

  • Seller: Halon
  • Year Founded: 2010
  • HQ Location: Göteborg, SE
  • Twitter: @halon_io
    954 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    35 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 60% Small, 40% Medium

What Do G2 Reviewers Say About Halon Protect?

AI-generated summary from verified user reviews

Pros
  • Users value the automation capabilities of Halon Protect, enabling custom configurations that enhance email deliverability significantly.
  • Users value the easy configuration of Halon Protect, enabling customized and efficient SMTP mail processing solutions.
  • Users appreciate the ease of use of Halon Protect, enabling straightforward deployment and customization for email processing.
  • Users praise the filtering efficiency of Halon Protect, significantly enhancing email deliverability and reducing blacklist issues.
  • Users value the reliability of Halon Protect, as it effectively filters unwanted email traffic consistently.
Cons
  • Users face a difficult learning process unless they have prior coding experience or SMTP knowledge for Halon Protect.
  • Users note a difficult learning curve, especially without prior coding experience, but support is available for setup.

What Are Recent G2 Reviews of Halon Protect?

What Are G2 Users Discussing About Halon Protect?

Clearedin

Complete B2B cloud security, compliance and phishing prevention across all popular B2B chat, email, collaboration and file sharing software. This SaaS offering solves the growing and costly enterprise problem of both collaboration and email security. The 2-year-old company based in San Jose, California uniquely addresses application and email security threat vectors by integrating machine learning and AI with a Zero-Trust Inbox and Zero-Trust Collaboration security product. Clearedin delivers the platform’s powerful multi-vector phishing capabilities through the patented Identity Trust Graph. This dynamic and always-learning digital map embodies an organization’s trust relationships with customers, vendors, and partners. The Identity Trust Graph ensures the Clearedin platform delivers the powerful benefits of Zero-Trust Security. A unique innovation, this graph automatically curates organization-specific security trusted and untrusted lists aided by machine-learning insight with zero manual administration or maintenance. The solution integrates directly into the communication and collaboration channels of Microsoft 365 -Outlook/OneDrive/Teams, G-Suite/Gmail/G Drive, Box, Dropbox, and Slack.

Average Rating: 4.8/5.0

Total Reviews: 2

How Do G2 Users Rate Clearedin?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 9.3/10)
  • Advanced Threat Protection (ATP): 10.0/10 (Category avg: 9.0/10)
  • Anti-Phishing: 10.0/10 (Category avg: 9.2/10)
  • Quarantine: 10.0/10 (Category avg: 9.0/10)

Who Is the Company Behind Clearedin?

  • Seller: Clearedin
  • Year Founded: 2022
  • HQ Location: Montreal, CA
  • Twitter: @Clearedin
    162 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    1 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Clearedin?

What Are G2 Users Discussing About Clearedin?

AegisAI Security

AegisAI is an API-based email security platform purpose-built for Microsoft 365 and Google Workspace. The platform utilizes autonomous AI agents to evaluate inbound mail across identity signals, sender behavior, and language intent. This multi-layered analysis enables the detection of highly sophisticated threats that often bypass traditional security gateways, specifically AI-powered spearphishing, compromised vendor accounts, and complex business email compromise (BEC). Rather than relying on static signatures, AegisAI analyzes user intent in every interaction. By understanding the unique communication patterns between specific senders and recipients, the platform identifies the subtle anomalies—such as shifts in urgency, tone, or phrasing—that signal a hijacked conversation or an impersonation attempt. Deployment is lightweight and non-disruptive, connecting directly via mail APIs without requiring MX record changes or altering mail flow. Beyond advanced social engineering, AegisAI provides comprehensive, native protection against phishing, malicious attachments, and zero-day malware. Its self-learning model also functions as an intelligent filter to neutralize persistent spam and promotional noise, ensuring a clean and secure inbox for both general users and high-target executives. This specialized filtering reduces the "alert fatigue" that often distracts SOC teams from high-priority security events. AegisAI leverages agentic investigation to secure every layer of the inbox, providing a robust defense against Account Takeover (ATO) attempts and Data Loss Prevention (DLP) risks. Unlike traditional tools that rely on basic reputation checks, AegisAI provides security teams with advanced AI forensics and actionable intelligence. Every detection—from a suspicious file to a subtle impersonation attempt—is supported by a clear evidence trail. This allows SOC teams to resolve the specific "blind spots" found in modern social engineering while maintaining total visibility into the evolving trust dynamics of their organization. By deploying a self-configuring control plane, AegisAI automates the remediation process, ensuring that once a threat is identified, it is neutralized across the entire enterprise instantly.

Who Is the Company Behind AegisAI Security?

Group-IB Business Email Protection

Group-IB Business Email Protection (BEP) solution offers comprehensive protection against both inbound and outbound email risks through: Detailed analysis As an essential component of the Managed XDR solution, Business Email Protection is enriched with unified visibility of users and cumulative email threats and streamlines the incident response process. Evolved detection BEP functionality inspects different format attachments to ensure they are safe and secure. The solution enables automatic detection and blocking of scams, phishing, malicious attachments, and BEC (business email compromise). Anti-spam filtering As a part of its functionality of dynamic email analysis – texts, URLs and attachments, BEP is able to implement anti-evasion techniques to detect attacks in real-time and to extract deep indicators. Users can also specify unwanted emails manually if they have all the required details for this setting. Detonation Email attachment analysis through BEP – as a part of the XDR platform, offers functionality to open links and files inside a virtual (sandbox) environment. Virtual machines emulate user activity to force malicious code detonation and perform malware analysis. Attribution Attack attribution is an integral part of building tactics for information defense. Due to the threat intelligence libraries, each attack is assigned a malware family and threat actor tags. This further helps detect similar attacks faster and builds protection based on the possibility that one or another type of attack may occur in the future.

Who Is the Company Behind Group-IB Business Email Protection?

  • Seller: Group-IB
  • Year Founded: 2003
  • HQ Location: Singapore
  • Twitter: @GroupIB
    9,646 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    572 employees on LinkedIn®

SYNAQ

SYNAQ Securemail is an AI-powered cloud email security service that stops phishing, impersonation, malware, spam and data leaks before they reach the inbox. Multi-layered protection delivers 99.95% spam-detection accuracy across 3,000+ checks, continuously-updated anti-virus, and LinkShield — powered by LUCA, our proprietary AI that predicts and neutralises zero-day URL threats. Identity Threat Protection (ITP) shuts down domain spoofing and executive fraud across all your domains; Data Leak Prevention enforces outbound policy and compliance. Deploy in under 24 hours with a single DNS change — no software, no hardware — and integrate natively with Microsoft 365 via Azure AD. Backed by a 100% punitive phishing-protection SLA, a money-back guarantee, threat-intelligence reporting and 24/7 expert support.

Who Is the Company Behind SYNAQ?

  • Seller: SYNAQ
  • Year Founded: 2004
  • HQ Location: Johannesburg, ZA
  • LinkedIn® Page: www.linkedin.com
    31 employees on LinkedIn®