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, 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.

Page 3 | Best Cloud Email Security Solutions: User Reviews from October 2026

Proofpoint Adaptive Email Security

The Tessian Cloud Email Security Platform intelligently protects against advanced threats and data loss on email, while reducing security teams' workloads, and coaching people about security threats in the moment. Using Behavioral Intelligence Modeling and machine learning, Tessian automatically detects and prevents threats that legacy Secure Email Gateways fail to stop, including advanced phishing attacks, email impersonation, accidental data loss and insider threats. We ensure security teams can work smarter, not harder. Tessian automates the investigation and remediation of email threats, freeing up the security team's time and in-the-moment security coaching educates users in real-time to help them make more informed security decisions. As a cloud-native solution, Tessian Security Platform integrates seamlessly with Microsoft 365, Microsoft Exchange, and Google Workspace environments. Tessian is a fully automated platform that requires zero configuration, is deployed in minutes, and learns people’s email behaviors within hours, closing critical security gaps in the enterprise security stack. Email is the number one threat vector in the enterprise, and security teams can no longer rely on traditional email security solutions to keep their organization safe. Tessian’s intelligent technology stops advanced threats and prevents data loss, strengthening email security and building a stronger security culture.

Average Rating: 4.6/5.0

Total Reviews: 45

How Do G2 Users Rate Proofpoint Adaptive Email Security?

Has the product been a good partner in doing business?: 9.3/10 (Category avg: 9.3/10)
Advanced Threat Protection (ATP): 8.9/10 (Category avg: 9.1/10)
Anti-Phishing: 9.3/10 (Category avg: 9.2/10)
Quarantine: 8.9/10 (Category avg: 9.0/10)

Who Is the Company Behind Proofpoint Adaptive Email Security?

Seller: Proofpoint
Year Founded: 2002
HQ Location: Sunnyvale, CA
Twitter: @proofpoint
31,157 Twitter followers
LinkedIn® Page: www.linkedin.com
5,261 employees on LinkedIn®
Ownership: NASDAQ: PFPT

Who Uses This Product?

Top Industries: Financial Services, Legal Services
Company Size: 58% Medium, 42% Large

What Do G2 Reviewers Say About Proofpoint Adaptive Email Security?

AI-generated summary from verified user reviews

Pros

Users appreciate the outstanding customer support of Proofpoint Adaptive Email Security, enhancing their overall experience and satisfaction.
Users appreciate the user-friendly design of Proofpoint Adaptive Email Security, which simplifies navigating its robust features.
Users commend the comprehensive security features of Proofpoint Adaptive Email Security, enhancing protection and overall user experience.
Users value the outstanding product quality of Proofpoint Adaptive Email Security, appreciating its robust features and excellent support.
Users value the robust security features of Proofpoint Adaptive Email Security, ensuring reliable protection against threats.

Cons

Users find the price of Proofpoint Adaptive Email Security to be slightly higher than alternatives, impacting affordability.

What Are Recent G2 Reviews of Proofpoint Adaptive Email Security?

"Outstanding Security and Support with User-Friendly Design"

Rating: 5.0/5.0 stars

— Bikash G.

Best Cloud Email Security Solutions - Page 3

How Many Cloud Email Security Solutions Products Does G2 Track?

Category Stats (Oct 2026)

How Does G2 Rank Cloud Email Security Solutions Products?

G2 Grid® for Cloud Email Security Solutions

How Do G2 Users Rate Proofpoint Adaptive Email Security?

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What Do G2 Reviewers Say About Proofpoint Adaptive Email Security?

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