Best Free Anti-Spam Software of 2025

Safeguard your outreach channels against temporary email addresses and spammers with our comprehensive solutions. We provide email validation, geographical location detection, and IP checks against established spammer databases sourced from various open-source lists. Our email validation service ensures that your prospect forms do not receive disposable email addresses, while our IP health check prevents proxy users from accessing your website or mobile application. Additionally, our phone validation feature verifies a vast array of both domestic and international phone numbers, ensuring your communications reach the right audience. By utilizing these tools, you can enhance the quality of your leads and protect your online presence effectively.

ZeroBounce is an email verification platform that scores and delivers emails. It helps businesses improve their inbox placement. The service can detect email typos, abusive and nonexistent email accounts, spam traps, and other potentially dangerous email addresses. ZeroBounce also offers an email scoring service and a suite delivery tools to enhance email inbox placement. ZeroBounce has a military-grade security infrastructure that ensures customer data is kept safe. ZeroBounce has validated over 23 billion emails to date and serves more than 400,000 businesses in 190+ nations. It also adds 200 new clients each day. ZeroBounce validates email lists and reports that they have a 99%+ accuracy rate. They also maintain a good reputation for sending quality. ZeroBounce was ranked no. 851 on Inc. 5000, the list of fastest-growing private businesses in the United States. ZeroBounce rose to number. 40 on the list.

The best email verification service in email marketing! Our compliance and deliverability tools are used to manage email data, clean up email lists, and automate email validation. To analyze an email address's health, we perform extensive deliverability checks. Our core belief is that you should always have access to the quality of your email lists for free. DataValidation's self service platform allows you to view the health of your email list at any time. You can download and purchase the Address-by Address Analysis to help maintain your email list. This analysis includes the following data: A+ to F grades; historical engagement; historical complainers; historical opt outs; history of spam traps and history of deceased. You don't have to worry about minimums, setup fees, contracts or minimums as we offer 24/7 online support. We work directly with ESPs to ensure your data is secure with us. It's easy to get started. Upload a list

MailCleaner, a business anti-spam gateway, is installed between your mail infrastructure to the Internet. It provides professional protection against viruses and eliminates spam up to 99%. Email is essential for all corporate operations. However, it can also pose a risk to your company. It allows viruses, spyware, ransomware and trojan to easily access your company's computers for phishing and extortion attacks. MailCleaner is able to stop malware from reaching your employees' inboxes. Its spam filter server blocks more than 99 percent of unwanted messages. Each message is analyzed and blocked so that you only receive the important ones. MailCleaner will automatically quarantine any harmful files that are detected. This will prevent further damage. We are proud that we offer packages that are suitable for both small and large companies.

Akismet effectively eliminates comment spam, allowing you to concentrate on what truly matters. Spam is universally despised; it’s a nuisance that diminishes the trustworthiness of your website. Manually sifting through spam can be perplexing and takes up valuable time. Each moment spent addressing spam detracts from your site's primary functions. With millions of websites relying on it, Akismet successfully filters out hundreds of millions of spam comments daily. Incorporating Akismet into your site means you can enjoy peace of mind, free from spam concerns. Select an Akismet plan that aligns with your requirements and activate your plugin or module using your API key. Feel assured that Akismet is vigilantly safeguarding your site against unwanted spam. By choosing Akismet, you are joining a movement to enhance the online experience by reducing spam. Our competitively priced personal and business plans enable us to offer complimentary spam protection to over 7 million users, making it easier for everyone to contribute to a cleaner internet.

Security Gateway's email threat detection technology was developed by MDaemon Technologies. This email industry pioneer has been protecting email servers against viruses, spam, phishing and other threats for more than 20 years. Our expertise is trusted by companies to keep their email communications safe. We protect all email platforms, including Microsoft Exchange, Office 365, and other. Our team of email security specialists will take the hassle out of managing your company’s email security. Security Gateway employs the most up-to-date email threat detection technology and policy enforcement tools in order to ensure good emails flow to and from your users. Security Gateway cloud service is easy to deploy, so you can focus on other important tasks. Check out this video to see some of the Security Gateway features.

Xeams, a secure and powerful complete email server for Windows, Linux Solaris, MacOSX, and other flavors UNIX, is available. Xeams supports SMTP and POP3, as well as IMAP. It has a powerful spam filtering engine which eliminates up to 99 percent of junk mail upon installation. It is very user-friendly because it offers a flexible approach to email.

Make the smartest investment today to reduce email security threats. Get a comprehensive email security solution for small businesses at small business pricing. Cybercriminals are targeting CEOs and CFOs in every industry, as well as HR, Accounting, and HR departments. Office 365 has very limited protection options to prevent impersonations, email fraud, and phishing. You can only create so many custom transport rules to block domains and protect against employee impersonations. PhishProtection is compatible with every email server, device, and smtp service. We can protect you no matter where you are, whether you're on your phone, outlook, or any other email client. It provides the best security for both Android and iOS devices.

Stop fraud, spam and account takeovers by using 99.5% accurate browser fingerprinting. You can quickly access suspicious visitor activity and geolocation. Integrate our API into your signup or server-side business rules. Instant notifications sent securely to your backend systems. This is ideal for building scalable, asynchronous processes. Any web application can be protected against account takeover. Protect your customers' accounts by accurately identifying threats and preventing them from causing damage. Users who re-use passwords across multiple services run the risk of having their accounts hacked by fraudsters who bought or hacked them from another source. These fraudsters can be caught by associating multiple login attempts with bot networks. Social engineering is still a reliable method for fraudsters accessing accounts. To prevent phishing accounts from being accessed easily, require new visitors to provide additional authentication.

Email aliases provide a way to maintain your anonymity online while safeguarding your inbox from unwanted spam and phishing attempts. These services are open-source and are developed and hosted within Europe, ensuring privacy and security. The next time a website requests your email, consider using an alias instead of your actual address. Any emails directed to this alias will be forwarded to your inbox, keeping the sender in the dark about your true identity. If you choose to respond to a forwarded message, simply hit "reply," and your response will originate from your alias, leaving your real email concealed. Additionally, sending emails from your alias is a straightforward process. You can quickly generate an alias whenever needed, making it easy to subscribe to a newsletter or create a new account online with just a click. Built on open-source technology, every component of SimpleLogin is also open-source. An alias functions as a complete email address, capable of both receiving and sending messages. You can manage all your aliases conveniently through the SimpleLogin website or via our browser extensions for Chrome, Firefox, and Safari. Moreover, you can access and manage your aliases on mobile devices using our apps available on both Android (through the Play Store and F-Droid) and iOS. This level of accessibility ensures you can maintain your privacy no matter where you are.

Human Presence stands out as the leading bot detection and spam prevention solution globally. It effectively halts form spam while maintaining a seamless user experience on both Shopify and WordPress platforms, requiring no coding skills. You can begin utilizing our app or plugin right away! With our Shopify shop protector app and the Human Presence plugin for WordPress, safeguarding your forms is as simple as a few clicks. Say goodbye to the hassle of recaptcha and those frustrating “I’m not a robot” checkboxes. Human Presence operates discreetly, ensuring a smooth experience for your website visitors. We take pride in providing exceptional support for all our applications and plugins, and our approachable support team is readily available to assist you through support requests or online chat. A staggering 40% of all web traffic is generated by bots, and while some serve legitimate purposes like search engine crawling, a significant portion consists of harmful entities. In fact, in 2020, 25% of all web traffic was attributed to malicious spam bots, highlighting the critical need for robust protection. As the digital landscape evolves, having reliable tools to combat these threats becomes increasingly vital for maintaining website integrity.

Spamty transforms your email address into a clickable link, ensuring that individuals must pass a verification process to access your information. By utilizing the powerful hCaptcha along with a customized version of Securimage PHP Captcha, Spamty provides robust defenses against automated bots. This tool is ideal for concealing your email or safeguarding any other contact details from unwanted web scrapers. When you find it necessary to display your email online, Spamty offers a protective layer against spam. You will receive a shareable link for the internet, and anyone attempting to access your contact information must complete a captcha challenge first. This added measure not only helps keep your email safe but also ensures that only genuine users can reach you.

The Secure Email Gateway serves as a robust solution for enterprises, employing a complex set of spam filters, antivirus tools, and content analyzers to block unwanted emails from infiltrating your organization's network. Given that security requirements can vary among different team members, it is possible to implement various security protocols tailored to specific roles, such as those in finance or sales. Dome Anti-spam offers the flexibility to create diverse profiles, each equipped with distinct security functions and limitations. Additionally, containment features safeguard against emerging threats like ransomware and zero-day attacks. The Valkyrie file verdict system assesses unfamiliar files, allowing users to access and utilize attachments with complete assurance against infections. Comodo's innovative containment technology guarantees that all potential risks are isolated before they can affect endpoints, thus eliminating any chance of malware infection, regardless of its origin. This comprehensive approach not only enhances security but also instills confidence in employees to perform their tasks without fear of digital threats.

Gated offers a straightforward and cost-free method to minimize unwanted emails while simultaneously supporting a charitable organization you care about. If your inbox is overflowing with irrelevant messages, Gated provides a free solution that filters out the noise by requiring unfamiliar senders to contribute to a cause you support in order to get in touch with you. This innovative service operates quietly in the background, effectively managing unwanted correspondence. By utilizing Gated, you can assist your chosen nonprofit as unfamiliar senders make donations to connect with you. Setting up a Gated account takes just a few minutes, and it requires no additional learning of new tools. The automated filter conveniently integrates into your existing email habits and adapts based on your engagement with emails, ensuring that trusted contacts can still reach you as they always have. When an unfamiliar sender wants to contact you, they must first donate to your favorite charity, and Gated will automatically challenge them with an email. It continuously learns from your interactions to prioritize known senders and fits effortlessly into your daily workflow. Moreover, Gated employs Google Secure Authorization, which you can choose to revoke whenever you need, ensuring your control over your email security. By using Gated, you're not just decluttering your inbox; you're also making a positive impact on causes that matter to you.

Vade stands out as a global frontrunner in predictive email security, safeguarding 1 billion mailboxes across 76 nations. We empower MSPs and SMBs to shield their Microsoft 365 users from sophisticated email threats such as phishing, spear phishing, and malware. Organizations including ISPs, MSPs, and SMBs select Vade's innovative email security tools to defend their clientele and enterprises from these advanced cybersecurity challenges. Our AI-driven solutions are specifically crafted to identify threats that conventional methods often miss. They effectively thwart dynamic phishing attempts that evade standard defenses, as well as targeted spear phishing and business email compromise schemes. Additionally, our technology is adept at neutralizing evasive polymorphic and zero-day malware attacks, ensuring comprehensive protection for all users. With our solutions, businesses can navigate the complexities of email security with confidence and peace of mind.

INKY is an award-winning cloud based email protection software. It protects businesses against phishing attacks, as well as blocking spam and malware. INKY uses domain-specific machine-learning and computer vision to identify zero-day phishing emails and block them from reaching legacy email systems. For suspicious emails, warning banners are included in the email. In minutes, integrates into Office 365 across the organization. Safe/Unusual/Malicious warnings let users know how to treat the email. Our advanced dashboard provides complete visibility and tracking of the threats being blocked. INKY's email security software inserts user-friendly warnings into emails. This provides specific guidance to educate and protect your users. Safe/Unusual/Malicious warnings with details guide the user to take a closer look or proceed cautiously. Report an email with just a click is a favorite feature of our clients.

SpamCop stands out as the leading platform for reporting unwanted email. It accurately identifies the source of spam messages and alerts the appropriate Internet service providers about them. By taking the initiative to report spam, you contribute significantly to addressing this ongoing issue. Additionally, your efforts in reporting unsolicited emails assist in enhancing various spam filtering systems, including SpamCop's own technology. The SpamCop Blocking List (SCBL) features the IP addresses associated with emails that have been reported by SpamCop users. This list is a valuable tool for both service providers and individual users, allowing them to effectively block and filter out unwanted correspondence. The SCBL operates as a dynamic and automated list, compiled from different sources, such as user reports and automated submissions. What sets the SCBL apart is its time-sensitive nature, allowing for the rapid and automatic removal of IP addresses from the list once reports cease, thereby maintaining its effectiveness in combating spam. By participating in this process, users can help improve the overall email experience for everyone.