Top 12 Email Anti-spam Software SaaS Companies in August 2026

Gothenburg, Vastra Gotaland, Sweden

Provider of email security and infrastructure software designed to change the landscape of email security. The company's software offers great scalability, multiple rate limiting and total control on spams, enabling service providers to tailor their protected email infrastructure.

Carson City, Nevada, United States

CleanTalk is a SaaS spam protection service for Web sites. CleanTalk uses protection methods which are invisible for site visitors. Connecting to the service eliminates needs for CAPTCHA, questions and answers and other methods of protection, complicating the exchange of information on the site. Our solutions are reliable, easy and efficient. Algorithms CleanTalk evaluates visitor behavior on the site and parameters filled in forms, these multi-level checks allow CleanTalk achieve such high-performance protection against spam attacks. The module is completely invisible to the visitors and allows you to permanently abandon the ways of protection that impede the communication of visitors to the site (CAPTCHA, question-answer, etc.). CleanTalk allows you to automate protection against distributed from spam and registration spam bots. The team CleanTalk has been developing a cloud spam protection system for 5 years and has created a truly reliable anti-spam service designed for you to ensure your safety. CleanTalk has an extensive database of spam activity of IP addresses and emails. We understand that these IP addresses are used for other types of attacks, including for fraud in electronic commercial transactions. The use the database of CleanTalk will help you more accurately identify fraud risks and can be used by you as one of the factors, as a complement to the existing system for tracking fraudulent activity. Every day CleanTalk receives information about spam attacks from 40-60 thousands of IP addresses. The entire base of spam active IP is about 20 000 000 IP addresses. https://cleantalk.org/help/fraud-prevention

Bratislava, Bratislavsky, Slovakia

Verify Email Addresses * Email Deliverability * Email Marketing Since 2003, Email List Verify has provided businesses and marketers with the highest quality email list verification and cleaning services. We’ve developed an automated, self-service web application software which enables our clients to validate their email lists quickly and securely. Our service reducing bounce rates and improves email marketing campaign ROI’s for businesses and marketers by: » Cleaning email lists by detecting invalid or non-operational mailboxes. » Ensuring that no email on the list receives an unsolicited message during the validation process. » Handling data securely with the highest level of data encryption in the industry. What really makes us uniquely exceptional is the level of professionalism and sensitivity with which we handle clients’ lists. Security is something that we take very seriously and that is why big companies and corporations continually trust us with their data. We have always, and will continue giving you value for money spent.  ➨➨Visit EmailListVerify.com to ensure that your email list is of the highest quality ... upload and validate lists of email addresses quickly and securely to our web interface.

Bordeaux, France

Altospam is a company that provides antispam, antivirus, and anti-phishing software solutions. They offer email protection services to protect against cyberattacks and ensure the security of emails.

Launceston, Cornwall, United Kingdom

Email Hippo provides fast, accurate and secure email verification software, accessed via web app or API. Check a list of up to 500,000 emails, or use our API to screen emails in real time to prevent spam and service abuse. With our ASSESS product, anti-fraud teams can also detect fraud risks at the point of sign up - checking emails for common signs of compromise or malicious intent. Email Hippo has provided email verification since 2000 and became ISO27001 certified in 2017. #emailvalidation #emailverification #fraudprotection #emailsecurity #datasecurity #emailmarketing #databroker #softwaredevelopment #eCommerce #datacleansing

United States

KillSpam uses AI to detect scammers and spam content from all your YouTube Channels, and removes them automatically.

Brno, Czech Republic

Producer of software solutions for secure communication and data protection. The company develops software that approach to security of both computers and computer networks and protecting them against internet threats and dangers. The company applies antivirus technology, antispam methods, and encryption technology.

Henderson, Nevada, United States

SpamHero was developed by two brothers, Curtis and Jeremy O’Reilly. After 13 years in the web hosting industry they’ve witnessed first hand the frustrations that business owners have over the cost of fighting spam, and the lackluster performance of existing solutions. What makes SpamHero different is that it is powered by a team of human spam-fighting technicians who are updating the filter rules several times a day. Over 5 million rules have been compiled so far. Unlike “robotic” algorithms that can sometimes mistake real email for spam, each rule is carefully crafted in such a way that real email does not get blocked. Because SpamHero is a hosted solution, it requires no new hardware or software installed at a client's location. The client changes what is known as their domain’s MX record so that email flows through SpamHero’s filtering servers before it reaches the domain’s real mail server. The filtering service all includes a powerful email quarantine that allows users to view the spam that is caught by the filter. Pricing for the service starts at $4.95 per month for domain-wide filtering.