Best Online Email Security Software

In an always-connected world, many businesses prefer email security software solutions that require no local installation. Below, you’ll find top online email security software platforms—often referred to as cloud-based or web-based—offering easy subscription models, automatic updates, and seamless remote access. Explore these recommended tools to streamline workflows, enhance collaboration, and keep your team productive from anywhere.

Last Updated: September 18, 2025

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List of Top Web-Based Email Security Software

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Trellix Cloud Security is a comprehensive cloud management software that helps businesses safeguard their cloud infrastructure and data against cyber threats. The platform provides advanced threat detection, real-time monitoring, and automated responses to security incidents, ensuring that cloud environments remain secure. Trellix Cloud Security integrates with leading cloud providers like AWS, Az... Read more about Trellix Cloud Security

Free Trial

NA

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Location

United States

ProtonMail is a secure email service that prioritizes user privacy and data protection. Based in Switzerland, the platform uses end-to-end encryption to ensure that only the sender and recipient can read the contents of emails, protecting sensitive information from prying eyes. ProtonMail is designed to be easy to use, with a user-friendly interface that doesn’t require any technical knowledge. ... Read more about ProtonMail

Free Trial

Available

Pricing Type

$9.99 Per month

Location

Switzerland

NeverBounce is a premier email verification tool designed to help businesses ensure the accuracy and effectiveness of their email marketing efforts. By providing real-time verification and batch processing, NeverBounce allows organizations to cleanse their email lists, eliminating invalid, inactive, and harmful email addresses that can negatively impact deliverability and sender reputation. The so... Read more about NeverBounce

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Available

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Location

United States

Barracuda Forensics and Incident Response is an email security software that helps organizations detect, investigate, and respond to email-based threats. The software provides advanced threat detection capabilities, including phishing, malware, and ransomware protection, ensuring that businesses can protect their email systems from cyber threats. Barracuda Forensics allows users to investigate sus... Read more about Barracuda Forensics and Incident Response

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Location

United States

MxToolbox Delivery Center is a powerful email security software designed to protect businesses from phishing, spam, and other email-based threats. The platform offers advanced filtering and threat detection tools that block malicious emails before they reach inboxes. MxToolbox also provides email delivery optimization, ensuring that legitimate emails reach their recipients without being marked as ... Read more about MxToolbox Delivery Center

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Location

United States

Voltage is a cutting-edge Data Governance Software designed to help organizations manage, protect, and utilize their data assets effectively. It offers a comprehensive platform for establishing data policies, ensuring data quality, and maintaining compliance with industry regulations, enabling businesses to leverage data as a strategic asset. Voltage features an intuitive interface that allows dat... Read more about Voltage

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NA

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Location

Canada

Simplify Microsoft 365 governance, administration, and security

M365 Manager Plus is a comprehensive IT management software designed to streamline and optimize the administration of Microsoft 365 environments for businesses of all sizes. The platform offers a wide range of tools for managing user accounts, licenses, permissions, and security settings, ensuring that organizations can efficiently oversee their Microsoft 365 deployments. M365 Manager Plus’s int... Read more about M365 Manager Plus

Free Trial

Available

Pricing Type

$345 Per feautre

Location

United States

PowerDMARC is an advanced email security software designed to protect businesses from phishing, spoofing, and other email-based cyber threats. The platform leverages cutting-edge technologies like DMARC, SPF, and DKIM to ensure that only legitimate emails are delivered to recipients, while malicious emails are filtered out before they reach the inbox. With PowerDMARC, organizations can implement a... Read more about PowerDMARC

Free Trial

Available

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Location

United States

Digital headquarters for advanced data loss prevention

ManageEngine Endpoint DLP Plus is a comprehensive endpoint data loss prevention (DLP) solution designed to protect sensitive data from unauthorized access, leakage, and loss across a variety of devices and endpoints. This software is equipped with advanced security policies that monitor, detect, and prevent data breaches or potential leaks from endpoints such as laptops, desktops, mobile devices, ... Read more about ManageEngine Endpoint DLP Plus

Free Trial

Available

Pricing Type

$795 Per year

Location

United States

GFI MailEssentials is an email security software designed to protect businesses from spam, viruses, phishing attacks, and other email-borne threats. It offers robust filtering tools that block unwanted or malicious emails before they reach the inbox, safeguarding the organization’s network. The software includes multi-layered protection, using various antivirus engines and anti-spam techniques t... Read more about GFI MailEssentials

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NA

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Location

Malta

SonicWall Email Security is a robust Email Security Software designed to protect organizations from a wide array of email-based threats, including phishing, malware, ransomware, and spam. It offers a comprehensive platform for securing email communications, ensuring that sensitive information remains confidential and that systems are safeguarded against cyberattacks. SonicWall Email Security featu... Read more about SonicWall Email Security

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Location

United States

PhishER is a cutting-edge cybersecurity solution designed to protect organizations from phishing and social engineering attacks. As phishing remains one of the most common and successful attack vectors, PhishER helps organizations detect and respond to these threats in real-time. The software combines AI-powered detection with manual verification processes, allowing security teams to identify phis... Read more about PhishER

Free Trial

NA

Pricing Type

$10 Per feautre

Location

United States

Heimdal Email Fraud Prevention is an advanced email security software designed to help organizations protect their email communications from phishing attacks and other cyber threats. This platform provides users with tools to detect and block fraudulent emails, ensuring that sensitive information remains secure. With Heimdal Email Fraud Prevention, businesses can easily implement advanced filterin... Read more about Heimdal Email Fraud Prevention

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Available

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Location

Denmark

One Platform. Total Security.

Heimdal Email Security is a robust anti-spam software designed to protect organizations from email-based threats such as phishing, malware, and spam. With its advanced threat detection and filtering capabilities, Heimdal Email Security ensures that suspicious emails are blocked before reaching users’ inboxes. The software leverages machine learning algorithms to identify emerging threats, provid... Read more about Heimdal Email Security

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Available

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Location

Denmark

Dark Web ID is a specialized managed service provider (MSP) software designed to monitor and protect organizations from potential security threats emerging from the dark web. By scanning the dark web for compromised credentials, sensitive data, and other vulnerabilities, Dark Web ID provides organizations with actionable insights to mitigate risks. The platform alerts users when their data is foun... Read more about Dark Web ID

Free Trial

NA

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Location

United States

Graphus is an advanced email security software designed to protect businesses from phishing attacks, spam, and other email-borne threats. Using AI and machine learning, Graphus analyzes incoming emails and detects malicious content or suspicious sender behaviors, preventing potential attacks before they reach the inbox. The platform features real-time scanning of attachments, links, and content, h... Read more about Graphus

Free Trial

NA

Pricing Type

$3 Per month

Location

United States

Email Security SoftwareDatto SaaS Defense is a cutting-edge email security software solution designed to protect businesses from phishing attacks, malware, and other email-based threats. The software uses advanced artificial intelligence and machine learning algorithms to analyze incoming emails, detecting suspicious content and malicious attachments before they reach users' inboxes. Datto SaaS De... Read more about Datto SaaS Defense

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NA

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Location

United States

Run and grow your business on ConnectWise

ConnectWise SIEM is a sophisticated IT management software designed to help organizations monitor, analyze, and respond to security threats in real time. This platform provides comprehensive tools for security information and event management (SIEM), ensuring that organizations can detect vulnerabilities and respond promptly to incidents. With ConnectWise SIEM, users can easily collect and analyze... Read more about ConnectWise SIEM

Free Trial

NA

Pricing Type

$10 Per user

Location

United States

Quick Heal Total Security provides comprehensive protection against a wide range of cyber threats, making it an essential tool for anyone concerned about digital security. This antivirus software includes features such as malware protection, email security, and advanced firewall protection to keep devices safe from phishing and hacking attempts. With a user-friendly interface, Quick Heal Total Sec... Read more about Quick Heal Total Security

Free Trial

NA

Pricing Type

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Location

United Arab Emirates

Cofense PhishMe is a leading email security software designed to help businesses prevent phishing attacks by educating employees and enhancing email threat detection. The platform offers tools for creating and delivering simulated phishing emails to employees, helping them recognize and respond to phishing attempts. Cofense PhishMe also provides automated training modules, reinforcing key security... Read more about Cofense PhishMe

Free Trial

NA

Pricing Type

$10 Per year

Location

United States

VIPRE Email Security is a leading Email Security Software designed to protect organizations from a wide array of email-based threats, including phishing, malware, and spam. It offers a comprehensive platform for securing email communications, ensuring that sensitive information remains confidential and that systems are safeguarded against cyberattacks. VIPRE Email Security features advanced threat... Read more about VIPRE Email Security

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Available

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Location

United States

Tuta Mail is an advanced email management software designed to provide users with a secure, privacy-focused email platform. With end-to-end encryption and a user-friendly interface, Tuta Mail ensures that your emails are protected from unauthorized access while offering powerful features for managing your inbox efficiently. The software allows users to organize emails, set up filters, and easily s... Read more about Tuta Mail

Free Trial

NA

Pricing Type

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Location

Germany

Vade is an advanced email security software solution designed to protect organizations from a wide range of cyber threats, including phishing, malware, and spam. This platform utilizes cutting-edge artificial intelligence and machine learning technologies to analyze email traffic in real time, identifying potential threats before they reach the inbox. With Vade, users can customize security polici... Read more about Vade

Free Trial

Available

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Location

France

Security Gateway by MDaemon is a robust email security software designed to protect organizations from email-based threats such as spam, phishing, and malware. This platform offers comprehensive features, including advanced filtering, encryption, and real-time monitoring, ensuring that email communications remain secure and compliant. With its user-friendly interface, administrators can easily con... Read more about Security Gateway by MDaemon

Free Trial

Available

Pricing Type

$1 Per user

Location

United States

Inky is a cutting-edge Email Security Software designed to protect businesses from email-based threats such as phishing, malware, and spam. The platform offers advanced threat detection, real-time email scanning, and secure email gateways, ensuring that sensitive information remains safe and communications are secure. Inky features an intuitive dashboard that provides visibility into email securit... Read more about Inky

Free Trial

Available

Pricing Type

$2.5 Per month

Location

United States

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