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Top Rated Email Security Software with Small business - Page 3

Last updated: June 2026

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81 software options

PhishTitan logo

Powerful Phishing Protection.

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PhishTitan is a cloud-based email security solution that helps businesses manage phishing protection for Microsoft 365 applications.

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Symantec Email Security.cloud logo

Anti-spam and email security software

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Symantec Email Security.cloud is an anti-spam software designed to help businesses filter unwanted messages and protect the system from email-borne viruses. The platform offers data loss prevention functionality, which enables managers to encrypt and control sensitive data.

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NeverBounce logo

Real time email verification and email list cleaning service

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NeverBounce is a cloud-based email verification and list cleaning solution that allows users of any level or scale to verify email addresses in bulk over time or instantly one at a time, providing a central dashboard boasting real time progress tracking, a custom API / webhook and JavaScript widget

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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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DeliverySlip logo

Secure electronic signature, email encryption & file sharing

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DeliverySlip is a cloud-based email security, file sharing and electronic signature solution which offers industrial-grade email encryption, secure file transfer, electronic approvals, web forms, bulk send, and more. The software works inside Microsoft Outlook, Gmail, and various other applications.

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Egress Protect logo

Email encryption and security platform

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Egress Protect is an email security software designed to help financial, healthcare, and government organizations streamline email encryption and file management operations. The application allows employees to handle data archiving, filtering, and storage operations via a unified platform.

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MimeCast Email Security logo

Cloud-based email security and threat intelligence platform

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MimeCast Email Security is a cloud-based secure email gateway designed to help businesses in healthcare, IT, legal, financial services, manufacturing, and other industries protect conversations from malware, spam, ransomware, spear-phishing, and zero-day attacks. Supervisors can monitor, detect and remediate internal threats by inspecting internal emails for malicious attachments, links, or confidential information.

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Zix Email Encryption logo

On-premise email encryption software

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ZixMail is an on-premise email encryption software designed to help financial institutions, healthcare providers, and other businesses communicate with internal and external stakeholders through secure emails. The application allows organizations to send encrypted messages to multiple email accounts, authenticate recipient details, and receive timestamp information to track and record the opening time of emails.

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MailWasher logo

Software for blocking spam and junk emails

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MailWasher is an anti-spam software designed to help businesses of all sizes locate, view, and delete suspicious or junk emails. It includes a spam detection tool, which allows organizations to scan and remove unwanted emails across servers.

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Proofpoint Email Protection logo

Secure email gateway management and threat intelligence tool

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Proofpoint Email Protection is a computer security management software designed to help businesses identify and block threats using AI-enabled tools. It offers an advanced business email compromise (BEC) defense feature, which enables administrators to analyze various attributes including message header and senders’ IP address.

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AVG Internet Security Business Edition logo

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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Guardio logo

Chrome extension for blocking malware and phishing attacks

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Guardio is a Google Chrome extension designed to help businesses provide protection against malware, phishing attacks, and identity theft and remove pop-up messages from the browser. It lets employees prevent unauthorized users from accessing web browsers and remove existing malware from devices via a unified platform.

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Dark Web ID logo

Threat detection and monitoring for businesses and MSPs

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Dark Web ID is a cloud-based cybersecurity tool, which monitors the dark web and alerts businesses to any risks or threats. The platform can be used by MSPs or enterprises to prevent data breaches and ensure sensitive employee or company data is not available on the dark web.

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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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SendGrid logo

Delivers reliable email at scale for businesses

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SendGrid is a solution that provides a cloud-based email infrastructure to help relieve businesses of the cost and complexity of maintaining custom email systems. It provides email delivery, scalability and real-time analytics along with APIs. The platform also offers SMTP service, email validation, deliverability insights, and dynamic templates, while supporting multiple programming languages including Node.js, Python, and Java.

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Zivver logo

Email Security Made Effortless

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Zivver is email security software which helps enterprises transfer business documents and ensure secure e-mail communication. It allows users to retract emails, view risks, causes, and impact of data breaches, configure workflows, and generate custom reports.

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EuropeanMX logo
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Cloud-based anti-spam for incoming and outgoing messages

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Use the cloud redundancy solution EuropeanMX as a reliable spam filter. Our system offers nearly 100% filter accuracy and virtually no false positives. Protect your IP ranges before getting blacklisted. Continuously archive your emails with EuropeanMX to always have a backup of your emails.

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OpenText Core Email Encryption​ logo
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Policy-based email encryption for compliance

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OpenText Core Email Encryption automatically encrypts sensitive emails based on customizable data loss prevention policies and content filters. The solution scans outbound messages in real time and applies encryption, quarantine, or blocking actions according to defined rules. It features a Best Method of Delivery engine that selects optimal delivery methods including S/MIME, TLS, or Secure Messaging Portal, and provides graphical reporting for compliance visibility.

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OpenText Core Email Threat Protection​ logo
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Email security platform with threat filtering

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OpenText Core Email Threat Protection defends your inbound, outbound, and internal email from phishing, ransomware, business email compromise (BEC), and impersonation attacks. With high-efficacy filtering, low false positives, and 24/7 threat analyst support.

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Abusix Mail Intelligence logo
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Cloud-based email security platform

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Abusix Mail Intelligence is an automated, cloud-based protection suite that enables businesses and organizations to protect their sensitive data from cyber-attacks. It protects users' mail servers and customers' inboxes from spam by orchestrating and automating your full security response including detecting malware and virus through machine learning techniques.

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M365 Manager Plus logo
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Management, reporting, auditing, and monitoring of Microsoft

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M365 Manager Plus is a reporting, auditing, monitoring, management, and security solution for Microsoft 365. Designed for businesses of all sizes, it helps users manage Exchange Online, Azure AD, Microsoft Teams, OneDrive for Business, and other services from a centralized dashboard.

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Stalwart logo
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Open-source mail and collaboration platform

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Stalwart Mail Server is an open-source email platform combining collaboration tools and security features in one unified solution.

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Area 1 logo
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Secure email gateway and anti-spam software

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Area 1 Horizon is a network security management software designed to help businesses protect systems against phishing attacks across various traffic sources including emails, web pages, and networks. The platform enables administrators to receive notifications about blocked phishing campaigns on a unified interface.

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SpamTitan Plus logo
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Zero-day threat protection and intelligence

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SpamTitan Plus is an anti-phishing solution, which provides features such as URL inspection, malicious link neutralizing, URL rewriting, and time-of-click analysis.

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OpenText Data Privacy and Protection logo
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Data privacy and protection portfolio

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Voltage is a data privacy and protection portfolio that can be used for data privacy readiness, secure collaboration, structured data optimization, and other use cases. It offers solutions for file analysis, sensitive data management, encrypted email, and more.

Read more about OpenText Data Privacy and Protection

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