SpamPatrol
SpamPatrol provides API and integrations that allow you to analyze messages submitted on your forms to see if they are spam or not. Instead of worrying about block lists, CAPTCHAs, honey pot fields, etc.
ALTCHA is a privacy-first solution built to help developers and website owners stop bots, spam, and automated abuse — without making things harder for real users. It replaces traditional CAPTCHA systems with a smarter, quieter approach to verification and threat detection.At the core of this system is ALTCHA Sentinel, an intelligent security layer that protects forms, APIs, and web services from malicious traffic. Sentinel doesn’t interrupt the user journey with puzzles or challenges. Instead, it uses machine learning, threat intelligence, and behavioral analysis to detect abuse in real time and block suspicious requests automatically.Designed to run silently in the background, ALTCHA Sentinel adapts to your traffic and learns from emerging threats. Whether you’re safeguarding a signup page or securing a high-traffic API, it ensures strong, automated protection — while keeping your website fast, accessible, and user-friendly.
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SpamBlocker
Efficiently blocks unwanted calls and SMS on Android without replacing your default app. Utilizes regex rules, contact filtering, STIR attestation, repeated call checks, dialed number, recently used apps, and a time schedule for precise, customizable protection.
MailScanner
MailScanner is a open source email security system design for Linux-based email gateways. It is used at over 30,000 sites around the world, protecting top government departments, commercial corporations and educational institutions.
reCAPTCHA
reCAPTCHA is a free service that protects your site from spam and abuse, using risk analysis techniques to tell humans and bots apart.
mosparo
mosparo is the modern solution for protecting your online forms from spam. The protection method is quite simple: mosparo blocks spam using rules matching the form’s data. The detection method is comparable to an e-mail spam filter.
Evap Mail
Looking for a secure and hassle-free way to manage temporary emails? Evap Mail is the modern solution for instant, anonymous email addresses. Perfect for sign-ups, verifications, or online privacy, Evap Mail offers instant email generation with no registration required.
Spamgourmet
Spamgourmet provides disposable, optionally self destructing, email addresses that get created automatically the first time they are used, forward messages, and then automatically expire after number of specified messages received.
Procaptcha
Prosopo Procaptcha redefines user verification with a unique approach that emphasizes privacy and security. It's a pioneering solution designed to offer an alternative to conventional CAPTCHA systems that often compromise user privacy.