Best Free Email Security Software
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Compare the Top Free Email Security Software as of August 2025
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What is Free 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 Free Email Security software currently available using the table below. This list is updated regularly.
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1
Guardz
Guardz
Guardz is the unified cybersecurity platform purpose-built for MSPs. We consolidate the essential security controls, including identities, endpoints, email, awareness, and more, into one AI-native framework designed for operational efficiency. Our identity-centric approach connects the dots across vectors, reducing the gaps that siloed tools leave behind so MSPs can see, understand, and act on user risk in real time. Backed by an elite research and threat hunting team, Guardz strengthens detection across environments, turning signals into actionable insights. With 24/7 AI + human-led MDR, Guardz utilizes agentic AI to triage at machine speed while expert analysts validate, mitigate, and guide response, giving MSPs scalable protection without adding headcount. Our mission is simple: give MSPs the scale, confidence, and clarity they need to stay ahead of attackers and deliver protection to every SMB they serve. -
2
EasyDMARC
EasyDMARC
EasyDMARC is a B2B SaaS solution that makes email authentication simple for small, medium, and enterprise businesses. In short, we secure domain and email infrastructure, protecting you and your business from phishing (email spoofing) attacks and increasing email deliverability. EasyDMARC’s deliverability tool, EasySender, covers all the aspects of email deliverability. The variety of features on the platform cover email list verification, mailbox warmup, and inbox placement. With EasyDMARC, you can achieve the following: -Visibility to the business email environment -Business identity control -Operations and communication security -Email deliverability With offices in the US, Netherlands, and Armenia, the company delivers the most comprehensive products for anyone who strives to build the best possible defence for their email ecosystem. EasyDMARC ultimately provides peace -
3
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 -
4
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.Starting Price: $2.50/month/user -
5
FileWall
Odix
odix - a market leader in Enterprise CDR (Content Disarm and Reconstruction), is now offering FileWall, a native cybersecurity application for Microsoft Office 365 mailboxes for SMEs. FileWall™ is designed to run in conjunction with existing Microsoft security solutions such as EOP and ATP, ensuring complete prevention against unknown attacks delivered via email attachments. FileWall™ doesn’t harm/change any of Microsoft sender related security capabilities.Starting Price: $1 per user, per month -
6
Cloudflare
Cloudflare
Cloudflare is the foundation for your infrastructure, applications, and teams. Cloudflare secures and ensures the reliability of your external-facing resources such as websites, APIs, and applications. It protects your internal resources such as behind-the-firewall applications, teams, and devices. And it is your platform for developing globally scalable applications. Your website, APIs, and applications are your key channels for doing business with your customers and suppliers. As more and more shift online, ensuring these resources are secure, performant and reliable is a business imperative. Cloudflare for Infrastructure is a complete solution to enable this for anything connected to the Internet. Behind-the-firewall applications and devices are foundational to the work of your internal teams. The recent surge in remote work is testing the limits of many organizations’ VPN and other hardware solutions.Starting Price: $20 per website -
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PreVeil
PreVeil
PreVeil applies end-to-end encryption in a radically different way. We protect organizations’ email & files from phishing, spoofing, BEC & more. Seamless for users. Easy for admins. PreVeil provides the enterprise with an easy-to-use encrypted email and encrypted cloud storage solution to protect important email and files. Moreover, PreVeil uses the gold standard of end-to-end encryption to secure data. PreVeil also provides the enterprise with a “Trusted Community” for communicating with fellow employees, contractors, vendors or other third parties. With a Trusted Community, employees can communicate and exchange information without worrying about being phished, spoofed, becoming victims of BEC, or having their admins compromised.Starting Price: $20 per user per month -
8
SecurityGateway™ for Email Servers
MDaemon Technologies
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 -
9
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, HIPPA.Starting Price: 0.99€/month/user -
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Kevlarr
Kevlarr
Kevlarr is the ultimate DMARC monitoring and management solution tailored exclusively for MSPs. Purpose-built from the ground up, our platform empower Our dashboard takes the complexity out of setting up and maintaining a strict DMARC policy. All irrelevant data is omitted through our AI-driven filters. Monitoring data related to spoof attacks or forwarded emails can be filtered out by our AI filters. As a result, you only have to pay attention to data that you or your customer actually have control over. This can save your specialists a lot of time. Our wizard guides you through the process of DMARC management. We have put our knowledge and years of experience in the field of DMARC management into this solution. For each customer, we zoom in on all domains that require your attention. Starting with the most urgent issues. This way you can be sure that you don't miss anything.Starting Price: $/domain/month -
11
Tuta
Tuta
Tuta offers a highly secure, encrypted email, calendar, and contacts service designed to give users complete control over their data. With end-to-end encryption powered by quantum-safe cryptography, Tuta ensures that all your communications are private and safe from surveillance. The platform is easy to use, supports mobile apps for Android and iOS, and is ad-free, offering a seamless experience across multiple devices. Tuta is committed to using renewable energy to power its servers, ensuring privacy while contributing to a greener future.Starting Price: €1.20 per month -
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Send It Secure
Protected Trust
Send and receive secure emails that enable you to meet HIPAA & GLBA compliance standards. Protected Trust Email Encryption is now Send It Secure by Protected Trust. You may know us as Protected Trust Email Encryption, or perhaps just Protected Trust. As our email encryption product has grown and our company offerings have increased, we believe it is the right time to create a new brand for our email encryption product. Our new brand comes with the product the market has learned to trust, and we welcome an even better user experience and an improved product designed to meet your needs. We are recognized as one of the most powerful encryption solutions on the market for the secure exchange of confidential data. Your trust and protecting your data are our priority. We are excited to bring you our updated email encryption solution, Send It Secure by Protected Trust.Starting Price: $15 per month -
13
Palisade
Palisade Technologies
The Next-Generation AI-Assisted DMARC Solution Tired of wrestling with complicated DNS records, cryptic authentication protocols, and endless manual checks? Meet Palisade, the first fully automated DMARC implementation and monitoring platform built with AI at its core. We empower organizations of all technical levels to boost email deliverability and prevent domain spoofing and impersonation.Starting Price: $29.99 -
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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. -
15
Encyro
Encryo Inc
Encyro offers secure file sharing, encrypted email, and electronic signatures. Encyro's award winning design makes the process easy for both you and your clients. You need not ask clients to sign up for any portal accounts. Encrypted Messaging and File Sharing You can directly send to any email address and Encyro automatically keeps your data secure both during transmission and storage to let you comply with HIPAA, GLB, IRS, GDPR, FINRA, SOX and other compliance standards. You can receive securely via your custom branded upload page that does not require the client to login or jump through hoops. Electronic Signatures Encyro e-signatures are designed to keep your transaction secure during remote signing. You control the login options and the type of signature to ensure that the right person is signing. Encyro also provides custom branding, automated reminders, and re-usable e-sign templates. NIST-800-63 compliant access codes by text/SMS for added security.Starting Price: $9.99/month/user -
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Xeams
Synametrics Technologies
Xeams is, a secure and powerful complete mail server for Windows, Linux, Solaris, MacOSX and other flavors of UNIX. Xeams supports SMTP, POP3, and IMAP. It features a powerful spam filtering engine that eliminates up to 99% of junk email upon installation. The software offers a flexible approach to email, making it a very user-friendly server. Xeams can block 99% percent of all junk messages right out of the box. The filtering rules are fully customizable and get better as Xeams adapts to your email environment. IMAP and POP3 servers built right into the system to easily fetch emails from an email repository to a client's machine. Xeams can be used as an email firewall in front of another server, such as MS Exchange, or as a full email server requiring no other software to process emails. Use Xeams in front of your Office 365 infrastructure to gain additional filtering, reporting and archiving capabilities that you don't get with Office 365 alone.Starting Price: $20.00/year/user -
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PhishProtection
DuoCircle
Make your smartest investment to reduce email security threats today, and get a comprehensive email security protection solution with small business pricing. Cybercriminals are targeting CEOs, CFOs, HR, Accounting Departments and regular employees across every industry. As you know Office 365 is extremely limited in the protection that you can configure to stop impersonations, email fraud and phishing. There are only so many custom transport rules you can build to constantly block domains or protect against employee impersonations. PhishProtection works on every email server, device or smtp service. No matter if you are on your phone, or outlook or any email client anywhere, we can protect you. It offers best-in-class security to iOS and Android devices alike.Starting Price: $100/month/user -
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Suped
Suped
Suped is a DMARC monitoring platform that helps startups and enterprises secure their email. We provide clear analytics, instant threat alerts for spoofing attempts, and step-by-step guidance to strengthen your domain's security. Stop phishing, improve your domain reputation, and make sure your emails hit the inbox every time. DMARC Report Analysis: Automatically processes complex aggregate (RUA) and forensic (RUF) reports into a simple dashboard. Real-Time Threat Alerts: Instant notifications for potential domain spoofing and phishing attempts. Guided Policy Enforcement: Step-by-step guidance to safely strengthen your DMARC policy to p=reject without blocking legitimate email. SPF & DKIM Monitoring: Track authentication alignment across all your sending services to diagnose delivery issues. Domain Health Score: At-a-glance score based on your compliance, reputation, and blocklist status. Unlimited Domains: Monitor DMARC for all your domains from a single account.Starting Price: $11/month -
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SendForensics
SendForensics
On average, 30% of emails fail to reach their target by dropping straight into customers' spam folders. Reclaim this lost revenue with the most advanced email deliverability system available. The SendForensics Deliverability Score is a unique, predictive modeling of an email's ability to reach any given inbox. To put it simply, it is a measure of an email's 'quality' in terms of how it will be perceived by global filtering-systems/ISPs and even human recipients themselves. Truly the Missing Metric. From email content, to the sending infrastructure, reputation, engagement-history, external feeds (such as Microsoft SNDS*) and more, SendForensics EDS automatically sifts through the datasets to present the biggest cause(s) for concern at every analysis.Starting Price: $49 per user per month -
20
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 -
21
Mimecast DMARC Analyzer
Mimecast
Block malware and phishing attacks and increase your email deliverability! Prevent brand abuse, scams and gain full insight into your email channel with DMARC Analyzer. DMARC is an email-validation system. DMARC was created by PayPal together with Google, Microsoft and Yahoo!. With DMARC an organization gains insight and control over the email channel. Organizations can use DMARC to protect their brands against abuse in phishing or spoofing attacks. DMARC Analyzer is one of the pioneers of DMARC and has been helping customers since the introduction of the DMARC standard in 2012. DMARC Analyzer provides user friendly DMARC analyzing software and acts as your expert guide to move you towards a reject policy as fast as possible. DMARC Analyzer provides a SaaS solution which empowers organizations to easily manage complex DMARC deployment. The solution provides 360° visibility and governance across all email channels. Everything is designed to make it as easy as possible.Starting Price: $9.99 per month -
22
WikiLocks
WikiLocks
WikiLocks works the way you do, within your most common applications. Simply select the data you wish to protect, assign access to individuals or groups, and distribute the newly protected document. The protection follows your document throughout its lifecycle, no matter how it is accessed, copied, pasted and attached.Starting Price: $40 -
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M365 Manager Plus is an extensive Microsoft 365 tool used for reporting, managing, monitoring, auditing, and creating alerts for critical activities. With its user-friendly interface, you can easily manage Exchange Online, Azure Active Directory, Skype for Business, OneDrive for Business, Microsoft Teams, and other Microsoft 365 services all from one place. M365 Manager Plus provides exhaustive preconfigured reports on Microsoft 365 and helps you perform complex tasks including bulk user management, bulk mailbox management, secure delegation, and more. Monitor Microsoft 365 services around the clock, and receive instant email notifications about service outages. M365 Manager Plus eases compliance management with built-in compliance reports and offers advanced auditing and alerting features to keep your Microsoft 365 setup secure.Starting Price: $345 per year
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24
Comodo Dome Antispam
Comodo Group
Secure Email Gateway is an enterprise anti-spam and threat prevention system that uses a sophisticated array of spam filters, anti-virus scanners and content analysis engines to prevent unsolicited mail from ever entering your network. Security needs differ from employee to employee. You may want to apply different security levels to different employees such as from finance or sales departments. Dome Anti-spam gives you the freedom to define different types of profiles with different security features and restrictions. Containment protects from the newest forms of ransomware, zero-malware, and other advanced threats. The Valkyrie file verdict system analyzes unknown files. Users are free to open, execute and use the attachments with ZERO risk of infection. Comodo's unique containment technology ensures that risks are fully contained before reaching the end point, so there is no risk of infection, even from the newest malware.Starting Price: $4.00/one-time/user -
25
Firefox Relay
Mozilla
Firefox Relay email aliases protect your real email address from public view, automatically forwarding emails to your real inbox. Now you can receive only the emails you want in your inbox. Sign up with your Firefox account to get started. Share Relay email aliases instead of your real email address to protect your email inbox, as well as your identity. As you browse, the Relay icon will appear where sites ask for your email address. Sign in to the Relay dashboard to keep track of the aliases you’ve created. Relay will forward messages to your email address. If an alias gets spam or unwanted messages, you can block all messages or even delete the alias, right from the dashboard.Starting Price: $0.99 per month -
26
Vade
Vade Secure
Vade is a global leader in predictive email defense, protecting 1 billion mailboxes in 76 countries. We help MSPs and SMBs protect their Microsoft 365 users from advanced email security threats, including phishing, spear phishing, and malware. ISPs, MSPs, and SMBs choose Vade's email security solutions to protect their users and their businesses from advanced cybersecurity threats, including phishing, spear phishing, and malware. Whether we’re protecting consumers through leading ISPs, or business through our MSP partners, our AI-based email security solutions are designed to detect the undetectable. Block dynamic phishing attacks that bypass traditional solutions. Block targeted spear phishing & business email compromise attacks. Block evasive polymorphic and zero-day malware attacks. -
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INKY
INKY Technology
INKY is an award-winning cloud-based email protection software. It blocks spam, malware, and most importantly — it protects businesses from phishing attacks like no other email security solution can. INKY uses domain-specific machine learning and computer vision to identify and block zero-day phishing emails that get through legacy email systems. Warning banners directly in the email offer guidance for suspicious emails. Integrates into Office 365 organization-wide within minutes. Safe/Unusual/Malicious warnings let users know how to treat the email. Our advanced dashboard gives you complete visibility and tracking into the threats being blocked. INKY’s email protection software places user-friendly warnings directly into the email, offering specific guidance to both protect and educate your users. Safe/Unusual/Malicious warnings with details guide the user to take a closer look or proceed cautiously. One of our clients’ favorite features is the ability to Report an Email with a click. -
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Email Shield
Fraud.net
Email Shield is a cloud-based email security add-in, which helps businesses across various industry verticals such as banking, fintech, eCommerce, government, mobile, travel, gaming, telecommunications and more, prevent email-based fraud attempts and receive fraud risk scores and alerts. It tracks and verifies trusted contacts, letting users expose risky emails and ensuring safety of financial transactions. Email Shield allows accounts payable (AP) agents to scan emails, AP senders, and attachments and approve, escalate, or reject payment and account change requests. The system accesses and modifies personal details in the active message including the subject, body, recipients, sender, and attachment information to ensure protection from invoice, vendor, and wire fraud. -
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DMARCOFF
DMARCOFF
Protect your brand from phishing and spoofing attacks with DMARCOFF. Spot suspicious activity, receive instant alarms and take immediate action. DMARCOFF helps you to: - Monitor your DMARC status - Ensure that your email domain is properly protected - Identify malicious emails sent from your domain - Receive weekly DMARC report which includes maximum visibility of your domain’s sending history - Visualize your reports in a user-friendly way - Get notified of any issues how and when you wantStarting Price: $15 -
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ProxiedMail
ProxiedMail
ProxiedMail is a proxy email service that aims to change the standard email flow to make emails smarter and more secure. Our goal is to separate email addresses and email clients so everyone can achieve more freedom and privacy by moving from one email provider to another just in a few clicks like moving from Gmail to ProtonMail. Using ProxiedMail you can generate unlimited email addresses for every website or purpose you want and receive the letters to your final emails. In this way, you can: - Protect yourself from spam - Avoid leaving your private data in places where you can avoid it - Creating proxy emails with your domain - Send messages from your proxy email - Also we're providing API and webhooks for incoming emails that would make software testing easier and connect the system they don't provide any API's, but do send emails - Zapier integrationStarting Price: $15/year
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