Open Source reCAPTCHA Alternatives
The best open source alternative to reCAPTCHA is Negative Captcha. If that doesn't suit you, our users have ranked more than 10 alternatives to reCAPTCHA and four of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to reCAPTCHA are mosparo, Captcheck and IconCaptcha.
Negative Captcha
Do you think this is a good alternative?YesNo12 alternatives to Negative Captcha- Free • Open Source
- Self-Hosted
A negative captcha has the exact same purpose as your run-of-the-mill image captcha: To keep bots from submitting forms. Image ("positive") captchas do this by implementing a step which only humans can do, but bots cannot: read jumbled characters from an image.
Negative Captcha Features
DiscontinuedThe last update is from 2018.
mosparo
Do you think this is a good alternative?YesNo- Free • Open Source
14 alternatives to mosparo- Online
- Self-Hosted
- Wordpress
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.
Captcheck
Do you think this is a good alternative?YesNo- Free • Open Source
11 alternatives to Captcheck- Online
- Self-Hosted
Open source reCAPTCHA alternative.
Captcheck Features
IconCaptcha
Do you think this is a good alternative?YesNo12 alternatives to IconCaptcha- Free • Open Source
- Self-Hosted
conCaptcha is a self-hosted captcha which is faster, more user-friendly and more customizable than other captchas - available for PHP and ASP.NET websites. Users no longer have to read any annoying text images, solve difficult math equations or play any puzzle games.
IconCaptcha Features
