# Best Cloud Email Security Solutions - Page 4 *By [Lauren Worth](https://research.g2.com/insights/author/lauren-worth)* Cloud email security solutions are secure email platforms used to prevent phishing scams that trick users into divulging privileged information. The platforms, hosted by the cloud email security vendor, also ensure emails containing links to malicious sites or trigger malware downloads are blocked before reaching the end user. Businesses use cloud email security solutions to prevent data loss and the release of privileges or credentials, and increase endpoint security by blocking malware and other web-based threats. These tools emerged as portions of the [secure email gateway](https://www.g2.com/categories/secure-email-gateway) market have adapted to the digital transformation and reduced the need for on-premise email security tools and appliances. There is some overlap between cloud email security tools and [email anti-spam software](https://www.g2.com/categories/email-anti-spam) and [email encryption software](https://www.g2.com/categories/email-encryption), but those tools typically serve one single purpose and may be delivered in both cloud and on-premise forms. To qualify for inclusion in the Cloud Email Security category, a product must: - Provide cloud-hosted email services - Filter fraudulent emails and phishing scams - Prevent and detect spam and other malicious email content ## Category Overview **Total Products under this Category:** 84 ## Trust & Credibility Stats **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 6,800+ Authentic Reviews - 84+ 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. ## Best Cloud Email Security Solutions At A Glance - **Leader:** [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) - **Highest Performer:** [Libraesva Email Security](https://www.g2.com/products/libraesva-email-security/reviews) - **Easiest to Use:** [Paubox](https://www.g2.com/products/paubox/reviews) - **Top Trending:** [Guardz](https://www.g2.com/products/guardz/reviews) - **Best Free Software:** [Paubox](https://www.g2.com/products/paubox/reviews) --- **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=1833&secure%5Bmedium%5D=sponsored&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=1417082&secure%5Bresource_id%5D=1833&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fcloud-email-security%3Fpage%3D5&secure%5Btoken%5D=e038df149515acf35f04486d237fe6c6b341c0d03de2be94235489a92c6df120&secure%5Burl%5D=https%3A%2F%2Fsublime.security&secure%5Burl_type%5D=paid_promos) --- ## Top-Rated Products (Ranked by G2 Score) ### 1. [Fortra Cloud Email Protection](https://www.g2.com/products/fortra-cloud-email-protection/reviews) A Key Part of Fortra (the new face of HelpSystems) Agari is proud to be part of Fortra’s comprehensive cybersecurity portfolio. Fortra simplifies today’s complex cybersecurity landscape by bringing complementary products together to solve problems in innovative ways. These integrated, scalable solutions address the fast-changing challenges you face in safeguarding your organization. With the help of the powerful protection from Agari Secure Email Cloud and others, Fortra is your relentless ally, here for you every step of the way throughout your cybersecurity journey. **Seller Details:** - **Seller:** [Fortra](https://www.g2.com/sellers/fortra) - **Year Founded:** 1982 - **HQ Location:** Eden Prairie, Minnesota - **Twitter:** @fortraofficial (2,758 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/fortra (1,738 employees on LinkedIn®) ### 2. [GreatHorn](https://www.g2.com/products/greathorn/reviews) Comprehensive post-delivery protection against targeted email attacks, powered by machine learning and automated response capabilities. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 **Seller Details:** - **Seller:** [GreatHorn](https://www.g2.com/sellers/greathorn) - **HQ Location:** Waltham, US - **Twitter:** @greathorn (782 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/greathorn/ (10 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Enterprise ### 3. [Group-IB Business Email Protection](https://www.g2.com/products/group-ib-business-email-protection/reviews) 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. **Seller Details:** - **Seller:** [Group-IB](https://www.g2.com/sellers/group-ib) - **Year Founded:** 2003 - **HQ Location:** Singapore - **Twitter:** @GroupIB (9,535 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/group-ib/ (490 employees on LinkedIn®) ### 4. [MailTAC](https://www.g2.com/products/mailtac/reviews) InQuest's Integrated Cloud Email Security solution, MailTAC, leverages Deep File Inspection® technology to swiftly dissect files to reveal threats, even when malicious content is embedded within macros, scripts, applets, spreadsheet cells, or metadata. MailTAC provides valuable insights through header and link analysis so you can proactively detect and prevent potential threats. Scan deeper, learn faster, and be ready for any emailed threat. Whether the threat is hitting your network for the first time, or has been hiding on your servers undetected, our email security solution has the tools you need to find it, uncover it, and stop it in its tracks. **Seller Details:** - **Seller:** [InQuest](https://www.g2.com/sellers/inquest) - **Year Founded:** 2013 - **HQ Location:** Austin, US - **LinkedIn® Page:** http://www.linkedin.com/company/inquest.net (21 employees on LinkedIn®) ### 5. [mxHero](https://www.g2.com/products/mxhero/reviews) All the Power & Simplicity of Cloud Storage for your Emails **Seller Details:** - **Seller:** [mxHero](https://www.g2.com/sellers/mxhero) - **Year Founded:** 2012 - **HQ Location:** San Francisco, US - **LinkedIn® Page:** https://www.linkedin.com/company/mxhero (16 employees on LinkedIn®) ### 6. [RevBits Email Security](https://www.g2.com/products/revbits-email-security/reviews) RevBits Email Security is a next-generation email security solution that aims to close significant gaps in the current marketplace. Leveraging sophisticated and unique algorithms such as a patented page impersonation detection methodology, RevBits Email Security achieves the deepest level of email analysis. To ensure the email threat landscape is fully covered, RevBits Email Security delivers email analysis at its SEG and the individual user's inbox through an advanced endpoint analysis agent. **Seller Details:** - **Seller:** [RevBits Privileged Access Management](https://www.g2.com/sellers/revbits-privileged-access-management) - **Year Founded:** 2016 - **HQ Location:** Mineola, US - **LinkedIn® Page:** http://www.linkedin.com/company/revbits-inc (12 employees on LinkedIn®) ### 7. [SCES](https://www.g2.com/products/sces/reviews) SorbSecurity aims to address the TOP cyber security problems at the basics, Phishing & Ransomware in Email, Web and Others. SCES is a comprehensive Cloud Service to defend your email and business. **Seller Details:** - **Seller:** [SorbSecurity](https://www.g2.com/sellers/sorbsecurity) - **HQ Location:** Singapore, SG - **Twitter:** @SorbSecurity - **LinkedIn® Page:** https://www.linkedin.com/company/sorbsecurity/ (2 employees on LinkedIn®) ### 8. [SYNAQ](https://www.g2.com/products/synaq/reviews) At SYNAQ, we believe in empowering businesses through secure and reliable email communication. Founded in 2004, we pioneered South Africa's first cloud-based email security platform. Today, we continue to lead the industry with cutting-edge cybersecurity solutions tailored to protect your business. Join us as we redefine email security with innovation and dedication. **Seller Details:** - **Seller:** [SYNAQ](https://www.g2.com/sellers/synaq) - **Year Founded:** 2004 - **HQ Location:** Johannesburg, ZA - **LinkedIn® Page:** https://www.linkedin.com/company/synaq (31 employees on LinkedIn®) ### 9. [xorlab](https://www.g2.com/products/xorlab/reviews) The xorlab Security Platform minimizes the attack surface on email with an AI-driven engine and protects your employees against modern email threats such as zero-hour phishing, business email compromise, fraud, malicious attachments, and ransomware. Maximize email security: xorlab analyses every email in the context of your organization and thus enables precise classification of all messages. Hundreds of signals per email are matched against your organization’s expected communication patterns to detect threats. Optimize email security spend: Automate the analysis and response to user-reported emails and get rid of block and allow lists. Stay in control: Trace back security decisions to indicators of attack, gain full visibility into communication patterns, and tune the xorlab platform to meet the unique needs of your organization. **Seller Details:** - **Seller:** [xorlab AG](https://www.g2.com/sellers/xorlab-ag) - **Year Founded:** 2015 - **HQ Location:** Stadtkreis 11, CH - **LinkedIn® Page:** https://www.linkedin.com/company/xorlab (26 employees on LinkedIn®) ## Parent Category [Email Security Software](https://www.g2.com/categories/email-security) ## Related Categories - [Secure Email Gateway Software](https://www.g2.com/categories/secure-email-gateway) - [Email Anti-spam Software](https://www.g2.com/categories/email-anti-spam) - [Intelligent Email Protection Software](https://www.g2.com/categories/intelligent-email-protection) --- ## Buyer Guide ### What You Should Know About Cloud Email Security Software ### What is Cloud Email Security Software? Using cloud email security software, companies can protect their systems from unwanted emails or malicious email threats. Cloud email security software tools detect and quarantine unwanted emails including those containing spam and bulk emails; malware, ransomware, spyware, and other viruses in malicious links or attachments; phishing and spear-phishing attempts; C-level executive impersonation attacks; advanced targeted attacks; and more. Cloud email security software may also provide other features such as email archiving, email encryption, and data loss prevention functions for outgoing email. Cloud email security software shares similarities with [secure email gateways](https://www.g2.com/categories/secure-email-gateway), which are designed to protect on-premises email. Cloud email security software, alternatively, is designed to protect cloud-based email environments and does not require on-premises hardware installations. Key Benefits of Cloud Email Security Software - Offer a cloud-based, rather than on-premises, email security solution - Include anti-spam, anti-malware, and anti-phishing capabilities - Detect and quarantine suspicious emails, including links and attachments ### Why Use Cloud Email Security Software? Cloud email security software helps companies protect their cloud-based email communications. Email is one of the most commonly used points of entry hackers use to gain access to corporate systems or to trick recipients into divulging sensitive information; often, these attacks lead to information or financial losses and reputational damage. Cloud email security software protects against email-focused attacks by blocking or quarantining suspicious emails. Given many companies have migrated from on-premises to cloud-based email solutions, the tools to secure their email need to evolve to face new threats emerging every day. In particular, cloud email security software protects against spam, malware, and phishing attacks. Malware attacks, which often originate from emails with malicious links or attachments that unsuspecting users click or open. Malware can include ransomware, spyware, or other viruses. Ransomware encrypts company files and demands a random to decrypt them. Spyware usually sits silently on company systems stealing sensitive information such as intellectual property or trade secrets. Other viruses seek to embarrass companies and can damage a company’s brand and reputation. For example, a virus that sends an email to all of the user’s contacts, would fall in this category. Cloud email security software also protects against social-engineering attacks such as phishing, spear-phishing, and c-level executive impersonation attacks. Phishing attacks are emails sent in bulk aiming to get employees to divulge information, such as sensitive financial information. Spear-phishing is a type of phishing that is targeted to a specific individual; in spear-phishing attacks, hackers spend time getting to know the targeted employee’s habits and preferences in order to send a personalized malicious email. The newest kind of phishing attacks are known as “impersonation attacks," which are often emails sent to company employees impersonating C-level executives which ask employees to make large financial transactions or purchases. Additionally, companies use cloud email security software to meet regulatory compliance regarding data protection. Most notably, data loss prevention functions in cloud email security solutions help prevent data leakage on outgoing emails. For example, hacked email accounts (known as account takeover) can email out sensitive information. A less sinister example would be when a legitimate employee mistakenly sends out sensitive information such as personally identifiable information (PII), Social Security numbers, credit card numbers, and other confidential data. Additionally, when a breach occurs, reporting functions in the cloud email security software can assist IT administrators in understanding which accounts were impacted in the incident. ### Who Uses Cloud Email Security Software? All companies that use email systems, whether on-premises or cloud-based, should have an email security tool in place. Cloud email security software is used to protect cloud-based email systems. Typically, a company's IT administrators manage the deployment and monitoring of these tools. Using cloud-based solutions instead of on-premises solutions, IT administrators can save time by not patching software or hardware. ### Cloud Email Security Software Features At minimum, cloud email security software offers advanced filtering functionality and rule-based actions to prevent email-based spam, malware, viruses, and phishing attempts. Many cloud email security software providers include additional functionality including advanced threat protection, encryption, and data loss prevention tools, among others. **Anti-spam —** This functionality prevents unwanted emails (bulk, mass, or other junk emails) from reaching recipients mailboxes. Filtering out spam emails can improve employee productivity, because employees are not sifting through unwanted emails. **Anti-malware —** This feature prevents emails with malicious links or attachments embedded with malware (ransomware, spyware, other viruses, etc.) from reaching email recipients. **Anti-phishing —** This functionality helps prevent social engineering attacks such as phishing, spear-phishing, and C-level executive impersonation attacks. **Filtering functionality —** With filters, IT administrators can allow and prevent the delivery of certain kinds of emails to end users. Filters can include: approved senders, approved lists, greylists such as bulk emails that may not be malicious, blocked senders, blocklists, IP reputation, content (such as profanity, credit card numbers, password protected files, and other sensitive information), virus detection, redirects and malicious URLs, newsletter detection, attachment size, and invalid recipients. **Rule-based actions —** Using rule-based actions, the cloud email security software can automatically block, delete, route to, tag a subject, copy an administrator, and redirect emails to another email address, among other actions. **Granular search functionality —** Cloud email security solutions enable IT administrators to locate specific emails using granular search functionality. Users can narrow emails down from sender, recipient, content, and many other factors. **User groups settings —** With user group settings, IT administrators can easily manage users by assigning them to groups and applying group settings. **Reporting —** One of the major benefits of using cloud email security software is the ability to create reports to understand unique threats over time. Many cloud email security solutions provide incident logging with granular detail, which is required for regulatory compliance. Reports often come in PDF or CSV formats. **Dashboards (administrator and end-user) —** Cloud email security solutions offer dashboards for administrators to manage their company’s email security, as well as quarantine dashboard for end users to review suspicious email activity related to their user account. #### Additional Cloud Email Security Features **Advanced threat protection —** As email-borne threats become more sophisticated, so must the security tools needed to thwart these attacks. Many cloud email security solutions include further security tools, providing an additional layer of protection on top of standard anti-spam, anti-malware, and anti-phishing functions. Advanced threat protections often include machine learning to conduct abnormal behavioral analysis, display name spoof detection (especially regarding C-level impersonation attacks), detecting lookalike email domains that are visually confusing (such as the letters “RN" looking like the letter “M" when in lowercase. Example, “name@ernail.com" visually looks like “name@email.com"), compromised email account detection, and other anomalies. **Embedded data loss protection —** While cloud email security is mostly concerned with ensuring the safety of incoming mail, some tools monitor outgoing mail, as well. Monitoring can prevent employees from sending sensitive information externally via email. Monitoring can also include things such as ensuring employees do not use profanity or other non-approved language in their emails to prevent reputational damage. **Multi-language —** Some cloud email security software providers support email analysis in multiple languages and allow custom dictionaries. **Embedded encryption —** Some cloud email security solutions offer embedded encryption functions, which apply encryption to a company’s outgoing emails based on specific policies. **Archiving —** Some cloud email security solutions also offer archiving solutions, which are helpful for companies in regulated industries to properly store, secure, and search emails as needed. Other Features of Cloud Email Security [Solutions: Account takeover prevention](https://www.g2.com/categories/cloud-email-security/f/account-takeover-prevention), [Advanced threat protection (ATP)](https://www.g2.com/categories/cloud-email-security/f/advanced-threat-protection-atp) ### Trends Related to Cloud Email Security Software Given that email remains an effective and preferred attack vector for hackers, deploying an email security solution is a must. For companies utilizing an on-premises email solution, secure email gateways act as a firewall preventing spam and other unwanted emails from entering the perimeter. But as companies shift from on-premises to cloud-based email providers, security must evolve with it. Cloud email security is designed to meet the needs of cloud-based email services and the increased connectivity those solutions provide. Cloud email security tools often offer advanced threat protection, which uses machine learning to respond to ever-evolving threats and can scan for malicious emails within the perimeter. ### Software and Services Related to Cloud Email Security Software [**Security awareness training software**](https://www.g2.com/categories/security-awareness-training) **—** Training a company’s workforce on the security threats they face via email attacks is one step of many to prevent email-borne attacks. Using security awareness training software, companies can simulate attacks or fraudulent emails to help employees better identify malicious content before encountering it in real-life scenarios. [**Password manager software**](https://www.g2.com/categories/password-manager) **—** Password managers help protect personal data by securing and strengthening personal passwords. They allow users to create strong and unique passwords for every website or application they log in to while saving the user from having to memorize each password. [**Multi-factor authentication (MFA) software**](https://www.g2.com/categories/multi-factor-authentication-mfa) **—** MFA software helps improve security across a company by requiring additional authentication measures for access to sensitive information, systems, or applications. [**Data loss prevention (DLP) software**](https://www.g2.com/categories/data-loss-prevention-dlp) **—** DLP tools prevent sensitive information, such as intellectual property, financial information, and customer sensitive data from being sent externally. Some cloud email security software providers offer native data loss prevention functionality for outbound emails, but DLP tools are also offered as a standalone product and can apply to other communication platforms besides emails, such as instant messaging and collaboration platforms. [**Secure email gateway software**](https://www.g2.com/categories/secure-email-gateway) **—** Secure email gateways offer similar features to cloud email security software, such as anti-spam and anti-malware functions, but are meant for on-premises deployments. [**Email anti-spam software**](https://www.g2.com/categories/email-anti-spam) **—** Though a native feature of cloud email security solutions, email anti-spam software is available as a standalone product. This is used to prevent malicious content from being delivered via email [**Email encryption software**](https://www.g2.com/categories/email-encryption) **—** Email encryption is an embedded feature of many cloud email security solutions, but is also available as a standalone product. Email encryption is used to ensure data in transit remains secure until the authorized party is identified [**Cloud access security broker (CASB) software**](https://www.g2.com/categories/cloud-access-security-broker-casb) **—** CASB software is used to provide a layer of protection and policy enforcement for employees accessing cloud-based software. CASB solutions are also used to identify abnormal behaviors from internal actors. [**Cloud file security software**](https://www.g2.com/categories/cloud-file-security) **—** Cloud file security software is used to secure information stored within cloud-based (SaaS) applications. [**Website security software —**](https://www.g2.com/categories/website-security)Website security software is designed to protect business websites from a number of internet-based threats.