Compare the Top Email Security Software in Japan as of November 2025

What is Email Security Software in Japan?

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 in Japan currently available using the table below. This list is updated regularly.

  • 1
    SpamTitan

    SpamTitan

    TitanHQ

    SpamTitan email security is an email spam filter for businesses, smbs, MSPs, and schools. SpamTitan email security blocks spam as well as phishing and day-zero attacks, viruses, malware, ransomware, and other email threats. Helps control mail flow, clean it, and protect against unwanted email. We provide easy-to-use yet advanced email security for businesses, smbs and MSPs that are Office365 friendly. SpamTitan - Premium functionality included: • CEO Impersonation protection • Phishing/ Spear phishing protection • Link analysis • Full Sandboxing • Zero Day Attacks protection • Mail Spooling • Spoofing protection • Malware and Ransomware protection • SPF/DKIM/DMARC checking • Encryption • Fully multitenant environment • Ability to rebrand the entire UI • Full REST API: • Comprehensive support and set up docs Try a FREE, fully supported trial of SpamTitan Email Security today.
    Leader badge
    Starting Price: $2.14/user/month
    View Software
    Visit Website
  • 2
    ESET PROTECT Advanced
    ESET Protect Advanced is a comprehensive cybersecurity solution designed for businesses of all sizes. It offers advanced endpoint protection against ransomware, zero-day threats, and sophisticated attacks with ESET LiveSense technology. It includes full disk encryption for legal compliance and data protection. The solution features proactive cloud-based threat defense using adaptive scanning, machine learning, cloud sandboxing, and behavioral analysis to prevent new threats. Mobile threat defense secures Android and iOS devices with anti-malware, anti-theft, and mobile device management. It also provides cloud app protection, mail server security, and vulnerability and patch management. Extended detection and response (XDR) enhances threat detection and response, while multi-factor authentication adds security. The solution offers single-pane-of-glass remote management for visibility into threats and users, along with advanced reporting and custom notifications.
    Starting Price: $275/month/5 devices
    View Software
    Visit Website
  • 3
    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.
    Leader badge
    Starting Price: $0/month
  • 4
    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.
    Leader badge
    Starting Price: $2.50/month/user
  • 5
    Zivver

    Zivver

    Zivver

    Zivver is the effortless, smart, secure digital communications platform powering the next generation of secure digital communications. Trusted by over 5,000 organizations globally, Zivver prevents data leaks caused by human error and ensures compliance. Zivver seamlessly integrates with all major email clients including Gmail, Outlook, and Microsoft 365 and features unparalleled zero-keys encryption, with smart features such as contextual machine learning powered business rules. Zivver allows anyone to share large files up to 5TB securely via their existing email client. Zivver is fully compliant with all leading data security standards, including ISO 27001, NTA 7516, GDPR, HIPAA.
    Starting Price: 0.99€/month/user
  • 6
    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
  • 7
    Keplersafe

    Keplersafe

    Keplersafe

    All-in-one security with 1-click resolve that protects your entire business. A unified threat protection solution designed to bring you cutting-edge, holistic defense with zero drain on your IT resources. Our AI anticipates risk, then proactively identifies and addresses issues automatically, saving you valuable time. Keplersafe is the complete solution that makes it easy to be compliant for mid-market businesses with any sized IT or security team by helping to ensure you're protected according to best practices and accepted industry standards. The Keplersafe platform is built on the principle of holistic, non-disruptive security. Our platform employs innovative AI technology and behavioral analysis to assist businesses in staying secure and compliant, without IT teams having to worry, investigate or fix issues themselves. Keplersafe is based in New York City, with Sales and R&D offices around the globe.
    Starting Price: $8.99 per month
  • 8
    ESET PROTECT Complete
    ESET PROTECT Complete is a comprehensive cybersecurity solution designed to safeguard business endpoints, cloud applications, and email systems. It offers advanced protection against ransomware and zero-day threats through cloud-based sandboxing technology and machine learning-driven detection. It includes full disk encryption capabilities, aiding compliance with data protection regulations. ESET PROTECT Complete also provides robust security for mobile devices, file servers, and email servers, incorporating anti-malware, anti-phishing, and anti-spam measures. Its centralized, cloud-based management console allows for streamlined deployment, monitoring, and response to security incidents across the organization. Additional features include vulnerability and patch management, ensuring that software vulnerabilities are promptly identified and addressed.
    Starting Price: $287.72 one-time payment
  • 9
    ESET PROTECT Elite
    ESET PROTECT Elite is an enterprise-grade cybersecurity solution that integrates extended detection and response with comprehensive multilayered protection. It offers advanced threat defense using adaptive scanning, machine learning, cloud sandboxing, and behavioral analysis to prevent zero-day threats and ransomware. The platform includes modern endpoint protection for computers and smartphones, server security for real-time data protection, and mobile threat defense. It also features full disk encryption, helping organizations comply with data protection regulations. ESET PROTECT Elite provides robust email security, including anti-phishing, anti-malware, and anti-spam technologies, along with cloud app protection for Microsoft 365 and Google Workspace. Vulnerability and patch management capabilities allow for automatic tracking and patching of vulnerabilities across all endpoints.
    Starting Price: $275 one-time payment
  • 10
    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
  • 11
    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
  • 12
    SpamTitan Plus
    SpamTitan Plus Anti-Phishing is an AI-driven email protection solution that provides “zero-day” threat protection and intelligence. Spam Titan Plus provides 100% coverage of ALL current market leading anti-phishing feeds, 1.5X increase in unique phishing URL detections and has 1.6X faster phishing detections than the current market leaders. With real-time continuous updates providing SpamTitan Plus with 10 million new, never-before seen malicious URLs a day. Book a SpamTitan Plus demo Today.
  • Previous
  • You're on page 1
  • Next