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Email Security Software for Windows

Last updated: March 2026

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67 software options

Guardz logo

Guardz

Cybersecurity solution

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Guardz is a managed cybersecurity solution built for MSPs to holistically protect and provide insurance coverage to SMEs with a holistic and multilayered approach.

The Guardz platform continuously monitors businesses' digital landscapes to safeguard their assets.

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Libraesva Email Security logo

Libraesva Email Security

Category Leaders

Exceptional Email Security

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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.

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Virtru logo

Virtru

Cloud-based data privacy and security platform

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Virtru has email and data encryption solutions for organizations of all sizes across all industries including healthcare, government, education, manufacturing, aerospace and defense, finance, IT services, Media and more.

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Heimdal Email Security logo

Heimdal Email Security

Email Protection in a Redefined Spam Filter

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Heimdal Email Security is an email protection solution that combines advanced spam filtering with robust malware prevention through a multitude of modern technologies.

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ESET Endpoint Security logo

Network security, network monitoring & endpoint protection

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ESET Email Security protects email communications for organizations with 250+ employees. Available as cloud-based and on-premises, it ensures internet security and malware protection. Features include mail protection, cloud sandbox technology, remote device management and firewall configuration.

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Zoho Mail logo

Zoho Mail is a secure, encrypted, and enterprise-ready email

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Zoho Mail, a business-oriented and privacy-guaranteed email service, is your single email solution. Zoho Mail also comes bundled with modern collaborative tools and a suite of apps to meet your business needs. Migrate now and get your unique email address with Zoho Mail.

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Hoxhunt logo

Make security training engaging, personalized, and effective

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Hoxhunt is a security awareness training software designed to help businesses educate and train employees to identify and report phishing attacks or malicious emails. Administrators can create relevant content to automatically send personalized malicious emails to employees.

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SpamTitan logo
Category Leaders

Anti-spam filter for business email. Vital email security.

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SpamTitan blocks spam, viruses, malware, ransomware, phishing attempts and other email threats. SpamTitan provides advanced yet easy to use email security for your business. Office 365 friendly

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AVG Internet Security Business Edition logo
Category Leaders

Cybersecurity platform for small and midsize businesses

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AVG Internet Security Business Edition is a complete protection solution that helps small and midsize businesses keep their systems and devices safe from external threats.

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NeoCertified logo
Category Leaders

Secure email for confidential & sensitive documents

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NeoCertified provides secure email encryption with Outlook integration for businesses of all industries, including healthcare, finance, legal & education

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Selzy logo

Affordable email marketing software

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Selzy is an intuitive email marketing platform that suits any business needs. It offers a wide range of integrations with your favorite tools, an easy-to-use drag&drop editor, and email templates for any occasion.

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Cypherdog Encryption logo
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One click. Complete protection.

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Cypherdog Encryption (CE) provides the ability to encrypt and decrypt e-mails with attachments with confirmation of the identity of the parties to the communication.

No "trusted" third party, zero-knowledge security model, asymmetric encryption.

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Proton Mail logo

Web-based email management platform

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ProtonMail is a web-based email management platform that helps businesses securely transmit encrypted emails between users both inside and outside of the organisation.

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DNSFilter logo

Cloud-based cybersecurity and network monitoring platform

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DNSFilter is a cybersecurity management software that enables enterprises, K-12 schools, and universities to detect online security threats and malware using artificial intelligence (AI) technology, machine learning (ML) algorithms, and content filtering capabilities.

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Topsec Cloud Solutions logo

Your Managed Email Security Specialists

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Topsec Email Security is a complete email filtering solution that helps organizations to check all their incoming and outgoing email content for virus and spam.

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Flashstart logo

DNS filtering software provider

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FlashStart is at the forefront of cyber security innovation, leveraging AI-powered DNS intelligence to stay one step ahead of evolving threats.

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Delivery Trust logo

Email Encryption Platform

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Delivery Trust is a user-friendly secure email solution to protect critical information.

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eM Client logo

Email, calendar, contacts, tasks, notes and chat in one app

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eM Client is a powerful email client with a clean and easy-to-use interface, which supports PGP and S/MIME encryption and digital signatures. Upload and lookup GPG keys on eM Keybook, Proton and keys.openpgp.org. Password-protected startup. eM Client easily connects to any email service.

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Keepnet Labs logo

Extended Human Risk Management Platform, Empowered by AI

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Harden your Office 365, Google Workspace, and Secure Email Gateways (SEGs) for full protection. Keepnet’s Email Threat Simulator (ETS) continuously tests your secure email gateway solutions, such as Office 365 and Google Workspace, by sending real-world attacks to a dedicated test inbox.

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Mailock logo

Secure emails with encryption and recipient authentication

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Exchange confidential information securely using your existing email infrastructure. Encrypt messages and authenticate your recipients.

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Encyro logo

Secure file sharing and electronic signatures software

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Send encrypted email and attachments to any email address, without forcing recipients to sign up. Clients can send secure messages and files with a simple link click. Request electronic signatures with advanced compliance options and personalize the platform with custom branding, logo, and colors.

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Conecta Suite logo

Manage your company's Google and Microsoft users all in one

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Conecta Suite is the ideal solution for those looking to maximize the potential of Google Workspace and boost team productivity. With features that make management more efficient and secure, it offers advanced and customized control to meet your company's specific needs.

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RMail logo

RMail®, track, prove, encrypt, e-sign, certify, all-in-one.

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RMail® is the e-security platform by RPost®. 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, and AI-infused services to prevent data leaks and human e-security errors.

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ConnectWise SIEM logo

Threat detection and response management software

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ConnectWise SIEM is a threat detection and response management software designed to help enterprises create, launch, and manage cybersecurity programs. The platform enables organizations to identify potential threats and malicious activities across networks & connected devices via a unified portal.

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Avast Premium Business Security logo

Premium online security and privacy protection for SMB

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Avast Premium Business Security combines our next-gen antivirus with VPN and USB control to help your employees and their devices stay more private and safer online, as well as offline. 

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