Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.
Portugal
EU
MTcaptcha Alternatives
MTcaptcha is described as 'MTCaptcha is a smart captcha service that prioritizes privacy and accessibility. It offers an adaptive invisible noCaptcha that is easy for humans but hard for bots, making verification frictionless. MTCaptcha is GDPR and WCAG compliant, ensuring that your data is never sold or' and is an app in the online services category. There are more than 10 alternatives to MTcaptcha for a variety of platforms, including Web-based, Self-Hosted, SaaS, Docker and Wordpress apps. The best MTcaptcha alternative is Cap Captcha, which is both free and Open Source. Other great apps like MTcaptcha are Anubis, reCAPTCHA, Procaptcha and Private Captcha.
Alternatives list
48 Anubis alternativesApplies sha256 proof-of-work challenges to incoming HTTP requests, targeting AI crawlers, bots that ignore robots.txt, and automated scrapers, protecting server resources and preventing unwanted search engine indexing for privacy-focused sites.
Cost / License
- Free Personal
- Open Source (MIT)
Application type
Platforms
- Self-Hosted
- Go (Programming Language)
- Docker
28 reCAPTCHA alternativesreCAPTCHA is a free service that protects your site from spam and abuse, using risk analysis techniques to tell humans and bots apart.
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.
Cost / License
- Freemium
- Open Source (Apache-2.0)
Application type
Platforms
- Online
- Software as a Service (SaaS)
- Wordpress
+3
Private Captcha is an independent, privacy-first, self-hostable Proof-of-Work CAPTCHA service made in EU. Instead of asking users to solve complex puzzles or track their behavior, Private Captcha solves an invisible cryptographic task in the background.
Cost / License
- Free Personal
- Proprietary
Application type
Platforms
- Online
- Self-Hosted
- Docker
+1
31 hCaptcha alternativeshCaptcha is designed to solve the most labor intensive problem in machine learning: labeling massive amounts of data in a timely, affordable, and reliable way.
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.
Cost / License
- Free
- Open Source (AGPL-3.0)
Application type
Platforms
- Online
- Self-Hosted
- Software as a Service (SaaS)
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.
Cost / License
- Free
- Open Source (MIT)
Application type
Platforms
- Online
- Self-Hosted
- Python
- JavaScript
- Drupal
- Django
- PHP
- Mautic
- Wordpress
+9
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Online
- Software as a Service (SaaS)
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Self-Hosted
- Software as a Service (SaaS)
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United States
United Kingdom
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India
Switzerland
Germany