Best Email Security Software

Compare the Top Email Security Software as of February 2026

What is Email Security Software?

Email security software protects organizations from cyber threats such as phishing, malware, and spam by filtering incoming and outgoing email traffic. It uses advanced threat detection, encryption, and data loss prevention (DLP) to safeguard sensitive information. These tools also offer features like email authentication (DMARC, SPF, DKIM) and real-time threat intelligence to block emerging attacks. By securing email communications, businesses can prevent data breaches, ensure regulatory compliance, and maintain user trust. Email security software is essential for mitigating human error, which is one of the leading causes of data breaches. Compare and read user reviews of the best Email Security software currently available using the table below. This list is updated regularly.

  • 1
    PowerDMARC

    PowerDMARC

    PowerDMARC

    PowerDMARC is a comprehensive email security solution designed to protect your brand reputation and safeguard your email communications. By leveraging advanced technologies such as DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT, PowerDMARC offers a robust defense against email threats like spoofing, phishing, and ransomware. Our user-friendly platform simplifies complex configurations, empowering you to easily manage and monitor your email security posture. With AI-powered threat intelligence, you gain valuable insights to proactively identify and mitigate emerging threats. Trusted by over 2000 organizations globally, including Fortune 100 companies and governments, PowerDMARC is your trusted partner in securing your email infrastructure.
    Starting Price: $8 per month
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  • 2
    Bitdefender Ultimate Small Business Security
    Bitdefender Small Business Security delivers enterprise-grade, layered cyber-protection designed specifically for small organizations. It covers Windows, macOS, iOS, and Android devices with centralized, easy-to-use management, so businesses without a dedicated IT staff can deploy and monitor security from one dashboard. Key features include multi-layered endpoint protection (machine learning, behavioral analytics, real-time monitoring, process termination, and rollback) to prevent known and unknown threats. It offers ransomware prevention and mitigation (detecting abnormal encryption attempts and restoring files from backups), fileless attack protection (memory/back-injection interference, script blocking), phishing & fraud prevention (blocking deceptive sites and warning users), and advanced exploit protection (real-time shield of browsers, Office apps, Adobe Reader) for comprehensive endpoint defense.
    Starting Price: $18.99 per month
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  • 3
    Mailfence

    Mailfence

    Mailfence

    Mailfence is an encrypted email service that offers OpenPGP based end-to-end encryption and digital signatures. Mailfence comes with a plethora of features that boost collaboration without compromising security and convenience. Mailfence documents allow you to safely store and edit documents, you can also share docs with your team with the push of a button. Mailfence calendar will keep your tasks, meetings, and events all in one secure place. Mailfence contacts will store your contacts and it will give you the ability to create mailing lists to maximize efficiency. We designed Mailfence to be a fully interoperable suite, which means you can synchronize Mailfence with most services out there. Mailfence business offers fully customizable whitelabel versions of the Mailfence interface. To put the cherry on top, Mailfence donates 15% of revenues of PRO subscriptions to IFF and EDRI to bolster the fight for Online privacy.
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    Starting Price: $2.50/month/user
  • 4
    Heimdal Endpoint Detection and Response (EDR)
    Heimdal® Endpoint Detection and Response is our proprietary multi-solution service providing unique prevention, threat-hunting, and remediation capabilities. It combines some of the most advanced threat-hunting technologies: - Next-Gen Antivirus - Privileged Access Management - Application Control - Ransomware Encryption Protection - Patch & Asset Management - Email Security - Remote Desktop - Threat Prevention ( DNS based ) - Threat Hunting & Action Center With 9 modules working together seamlessly under one convenient roof, all within one agent and one platform, Heimdal Endpoint Detection and Response grants you access to all the essential cybersecurity layers your business needs to protect itself against both known and unknown online and insider threats. Our state-of-the-art product empowers you to quickly and effortlessly respond to sophisticated malware with stunning accuracy, protecting your digital assets and your reputation in the process as well.
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    Starting Price: $0/month
  • 5
    SecurityGateway™ for Email Servers
    Developed by MDaemon Technologies, an email industry pioneer, Security Gateway's email threat detection technology has been protecting email servers from viruses, spam, phishing, data loss and other threats for over 20 years. Simply put, companies trust our expertise to help keep email communications safe. We protect all email platforms including Microsoft Exchange, Office 365 and others. Let our team of email security experts take the headache out of managing your company's email security needs. Security Gateway uses the latest email threat detection technology and policy enforcement tools to keep good emails flowing to and from your users. The Security Gateway cloud service can be deployed quickly and easily, allowing you to focus on other important tasks. Watch a short video to learn about some of the Security Gateway features.
    Starting Price: $1 per user per month
  • 6
    VIPRE Email Security

    VIPRE Email Security

    VIPRE Security Group

    VIPRE Email Security protects your email users and business network from the latest, most sophisticated malware, weaponized attachments, and phishing threats that bypass traditional detection methods. As a secure email gateway, it analyzes inbound and outbound emails in real-time for threats. Powerful visual analytics provide visibility into ongoing attacks, enabling quick and precise response to threats. With a simple integration into Microsoft 365, VIPRE can remove malicious or suspicious emails from a user’s inbox even after delivery. Available in two versions: VIPRE Email Security Cloud provides strong core protection, while VIPRE Email Advanced Threat Protection offers advanced, AI-driven techniques for file attachment and link analysis.
    Starting Price: $30/seat/year
  • 7
    Spambrella

    Spambrella

    Spambrella

    Dynamically classify imposter email. Preemptively identify and sandbox suspicious URLs. Leverage big-data analysis to accurately classify bulk mail. All within a single service that connects with Microsoft 365 and Google Workspace. Spambrella’s Email Security and User Awareness Training technology is used by some of the World’s largest and most successful security-conscious companies in a multitude of continents and environments. Delivered on a global scale, Spambrella is ready to unify your email security and user awareness training requirements. Think of us as your outsourced email security team! We have deep technical expertise of all other service providers such as MxLogic, Mimecast, Symantec.cloud and know how to migrate you effortlessly. Schedule a demo today with our cybersecurity experts to uncover email threats targeting your email users.
    Starting Price: $1.00
  • 8
    Guardian Digital

    Guardian Digital

    Guardian Digital

    Guardian Digital secures against email threats like phishing, zero-day exploits and ransomware attacks that define the modern threat landscape email users face every day. We believe email security is business security, as greater than 90% of all cyber attacks originate from an email. The most effective email protection is delivered through a purpose-driven solution designed to close critical security gaps in Microsoft 365 and Workspace, coupled with the expert setup, ongoing remote system management and accessible support required to improve IT security. With real-time cybersecurity business insights, we help you understand what your risk profile is today, and protect you from the dangers that all businesses face. EnGarde Cloud Email Security - Key Features: • Phishing, spoofing & impersonation protection • Link & file analysis • Zero-day attack protection • Malware & Ransomware protection • SPF/DKIM/DMARC checking • Encryption • Comprehensive management & support service
    Starting Price: Monthly & Annual Subscriptions
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    dmarcian

    dmarcian

    dmarcian

    Our DMARC management platform visualizes DMARC data in powerful and meaningful ways so you can quickly identify authentication gaps with your SPF and DKIM configurations, as well as unauthorized use of your domains. In addition to aggregating DMARC data, our platform provides domain administration teams with the necessary features to adopt DMARC with clarity and confidence. Providing actionable insights, it is powered by the most accurate source classification engine in the industry and affords users with assurances of the true origin of a particular mail stream. dmarcian has been processing DMARC data since the inception of the specification in 2012.
  • 10
    LuxSci

    LuxSci

    Lux Scientiae

    LuxSci provides HIPAA-compliant web and email communications services. LuxSci creates uniquely secure and customizable enterprise-grade environments and solutions that enable organizations to confidently meet their specific business and security needs at scale. LuxSci’s HIPAA-compliant email and web solutions are HITRUST certified and include: • Secure High Volume Sending for delivering massive volumes of transactional and marketing emails. • Secure SMTP Connector for encrypting outbound emails sent from Microsoft 365 and Google Workspace. • Secure Email Marketing platform for creating and sending marketing campaigns with ePHI. • Secure Email Hosting for reliable and secure day-to-day business email. • Fully managed Secure Web and Database Hosting for web applications that require compliance. • Secure Forms to safely collect and store sensitive information. LuxSci provides a full suite of secure technology for companies requiring compliant web and email services.
    Starting Price: $4 per/user/month
  • 11
    ESET Cloud Office Security
    Preventive protection for cloud-based applications such as email, collaboration, and storage. A powerful combination of spam filtering, anti‑malware scanning, anti‑phishing, and advanced threat defense capabilities. Equip your Microsoft 365 Exchange Online, OneDrive, Teams, and SharePoint Online with an extra layer of advanced protection. Helps eliminate unsolicited emails, targeted attacks, and ransomware, allowing employees to focus on their jobs and ensure business continuity. Get immediate notifications direct to your dedicated console, or via alerts. New users are protected automatically. Provides advanced protection for Microsoft 365 applications against malware, spam, or phishing attacks with ultimate zero-day threat defense and an easy-to-use cloud management console. Now using an enhanced, award-winning engine with improved performance, this essential component filters all spam emails and keeps user mailboxes free of unsolicited or undesired messages.
    Starting Price: $119.50 per year
  • 12
    RMail

    RMail

    RPost

    RMail® is the e-security platform by RPost®, a global leader since 2000. RMail specializes in elegantly easy to use email encryption for privacy and compliance, e-signatures, legal e-delivery proof, secure file sharing, email impostor protection, document rights management, and AI-infused services to prevent data leaks and human e-security errors. RMail’s transmission e-security services are most often used by businesspeople or business systems that send important, sensitive, or consumer-regulated information. These RMail services are generally applied to those messages where the sender needs functionality beyond standard email in terms of (a) easier to use and more automated email encryption for privacy compliance, (b) returning a verifiable proof record of who said what to whom by email, (c) assurance and peace of mind related to delivery and open status of important and time-deadline email, (d) need a timestamped proof of content delivered, (f) need to share large files securely.
    Starting Price: $7/month/user
  • 13
    Echoworx

    Echoworx

    Echoworx

    Echoworx is a fully managed, cloud-based SaaS email encryption solution trusted by businesses worldwide. It offers 8 secure delivery methods, supports 28 languages, and features 9 authentication options, enabling secure communication anywhere, on any device. Key Features: • Multiple Secure Delivery Methods: Web Portal, S/MIME, PGP, Secure PDF, Certificate Encryption, Secure Attachment (PDF, Office, ZIP), TLS with fallback • Free Proof of Concept (POC): Experience full functionality with a risk-free trial • 24/7 Technical Support • Extensive Branding Options • Message Tracking & Recall • End-to-End Deployment: Seamless integration and setup across platforms • Advanced Authentication: Full OAuth Access, Self-Registration, SMS, Shared Secret Passphrase, SSO, System-Generated Verification Codes, Passwordless, and Multi-Factor Authentication (MFA) • Accessibility by Design • Self-Service Account Management
  • 14
    Libraesva Email Security
    Protect your business from disruption, financial loss and reputational damage. Libraesva Email Security stops known and emerging email threats from reaching their target, so you only receive legitimate messages. It provides exceptional email security by integrating cloud email and a secure email gateway with Libraesva’s unique Adaptive Trust Engine that uses AI to learn the usual patterns of behavior for organizations and individuals, continuously assessing the strength of business-to-business trust and proactively holding anomalous traffic. Libraesva Email Security scans and filters all inbound and outbound emails for advanced malware, phishing, business email compromise, spam and more. Proprietary sandboxing technology removes dangerous payloads and active content from attachments, and you can protect users from visiting unsafe sites with active URL analysis that checks every link.
  • 15
    SecurityHQ

    SecurityHQ

    SecurityHQ

    SecurityHQ is a world leading independent Managed Security Service Provider (MSSP), that detects, and responds to threats, instantly. As your security partner, we alert and act on threats for you. Gain access to an army of analysts that work with you, as an extension of your team, 24/7, 365 days a year. Receive tailored advice and full visibility to ensure peace of mind, with our Global Security Operation Centres. Utilize our award-winning security solutions, knowledge, people, and process capabilities, to accelerate business and reduce risk and overall security costs. Most Popular Services: Managed Detection and Response (MDR) Endpoint Detection and Response (EDR) Managed Extended Detection and Response (XDR) Vulnerability Management Services Managed Firewall Digital Forensics & Incident Response Managed Network Detection and Response (NDR) Penetration Testing CISO as a Service
  • 16
    EmailAuth.io

    EmailAuth.io

    EmailAuth

    EmailAuth® is a TIER 1 OEM and a market leader in Email Authentication. Available 100% on-premise, or in-country cloud (local cloud) or on AWS/AZURE/GCP globally - We make it easy to unleash the power of email authentication. It is an anti-spoofing, anti-impersonation, and anti-phishing platform that ensures that no one can abuse your domains online. If anyone in the world spoofs your domains, EmailAuth collates data from all across the world to ensure that even a single unauthorized email is caught and rejected by global recipients of the world. It even extracts the IP of the sender, so this threat intelligence can be used to block the attacker across your cyber security fabric (SOAR capable). #StopGettingPhished #BeSpoofProof
  • 17
    Smartlockr

    Smartlockr

    Smartlockr

    Smartlockr is a people-centric data security platform to easily enable secure email and file sharing for an entire organization. Smartlockr prevents data leaks by keeping user-friendliness in mind with everything we do. By eliminating the human error, we ensure your workforce is your strongest asset in preventing data leaks. Smartlockr can be customized for each organization, so that every employee can continue to work with the (email) systems they are used to. Smartlockr can be used with almost every operating system and device. It is available as a plug-in for Microsoft 365 (Outlook), it can be integrated into existing systems and an SMTP relay service can be used too. Even a combination is possible if required. Smartlockr can also be used to securely send and receive large files of up to 5 TB. Smartlockr is compliant with all privacy regulations and security standards like GDPR, ISO, NTA 7516.
    Starting Price: €0.42 / month / user
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