Open-source projects categorized as Captcha | Edit details

Top 23 Captcha Open-Source Projects

  • buster

    Captcha solver extension for humans

    Project mention: this bot calling out a user for stealing comments for upvotes and the guy trying to bail by deleting his comment | | 2022-04-09
  • undetected-chromedriver

    Custom Selenium Chromedriver | Zero-Config | Passes ALL bot mitigation systems (like Distil / Imperva/ Datadadome / CloudFlare IUAM)

    Project mention: How does to by pass a website which before opening checks whether the user is a bot or not ? | | 2022-05-21

    You use Undetected Chromedriver.

  • SonarLint

    Deliver Cleaner and Safer Code - Right in Your IDE of Choice!. SonarLint is a free and open source IDE extension that identifies and catches bugs and vulnerabilities as you code, directly in the IDE. Install from your favorite IDE marketplace today.

  • recaptcha

    ReCaptcha helpers for ruby apps (by ambethia)

    Project mention: help with setting CSP on ruby on rails | | 2022-03-24

    hello! I'm pretty bad with ruby on rails and have a lot of trouble setting CSP. Just can't seem to get away without: `default_src :unsafe_inline` and `script_src :unsafe_inline``. Also the recaptcha v3 that we have to use at work is not helping: Nobody at work can seem to help with this issue at all. Looking for any help, please! Much appreciated, thanks!

  • captcha

    Go package captcha implements generation and verification of image and audio CAPTCHAs. (by dchest)

    Project mention: We added CAPTCHA to the name registration flow | | 2021-12-29

    Check it out! By the way, it's 100% self-hosted, and Google-free, based on the excellent Golang CAPTCHA library: While you are there, try the audio version - trippy!

  • no-captcha

    No CAPTCHA reCAPTCHA For Laravel.

    Project mention: Integrating Google re-Captcha In Laravel | | 2022-02-24

    The package that we will going to use:

  • base64Captcha

    captcha of base64 image string

  • svg-captcha

    generate svg captcha in node

    Project mention: Decode captcha created by library svg-captcha | | 2021-06-06

    The Cowin portal set up for booking vaccination slots in India has (had?) a captcha to make sure bots are not able to book slots. They used an open source library called svg-captcha to generate the captcha.

  • Scout APM

    Less time debugging, more time building. Scout APM allows you to find and fix performance issues with no hassle. Now with error monitoring and external services monitoring, Scout is a developer's best friend when it comes to application development.

  • django-simple-captcha

    Django Simple Captcha is an extremely simple, yet highly customizable Django application to add captcha images to any Django form.

    Project mention: Do you guys use reCaptcha (or a similar system)? Which version/product do you use? | | 2021-10-02

    I developed and maintain django-simple-captcha, which makes it dead simple to add captchas to any Django form.

  • challenge-bypass-extension

    Privacy Pass: a privacy-enhancing protocol and browser extension.

    Project mention: Privacy Pass | | 2022-05-21
  • invisible_captcha

    :honey_pot: Unobtrusive and flexible spam protection for Rails apps

    Project mention: Rails application boilerplate for fast MVP development | | 2021-08-06

    add invisible_captcha

  • PHPAuth

    PHPAuth is a secure PHP Authentication class that easily integrates into any site.

    Project mention: Alternatives for passwordless login like Magiclink? | | 2022-01-05
  • lc-core

    The LibreCaptcha framework, for self-hosted, privacy respecting CAPTCHAs

    Project mention: Coracle - Kotlin based Processing clone | | 2022-04-28

    Compared to OpenRndr this looks simpler to get started with. What is your plan for supporting JVM? If it can render to a BufferedImage, I would like to use it for creating CAPTCHA designs. (The rain drop example reminded me of the rain drop CATPCHA in this project )

  • authx

    Ready to use and Customizable Authentications and Authorisations Management for FastAPI ⚡

    Project mention: Generic OIDC providers with FastAPI | | 2022-04-08

    Hi guys, is there a package in FastAPI that supports all generic OpenID connect providers? i've been trying to use AuthenticationX but the tutorial isn't explanatory enough. can i get recommendations?

  • friendly-challenge

    The widget and docs for the proof of work challenge used in Friendly Captcha. Protect your websites and online services from spam and abuse with Friendly Captcha, a privacy-first anti-bot solution.

    Project mention: Business owners with contact me website pages: What is your "self host" captcha solution? | | 2022-02-14

    I'm personally looking forward to using FriendlyCaptcha or something of that sort, that does a small PoW calculation.

  • recaptcha-module

    🤖 Simple and easy Google reCAPTCHA integration with Nuxt.js

    Project mention: When to reset recaptcha and when to not? | | 2022-03-07

    I am using nuxt/recaptcha module and have a login form

  • react-hcaptcha

    hCaptcha Component Library for ReactJS

  • python-anticaptcha

    Client library for solve captchas with support.

    Project mention: ¿Cómo resolver captcha mientras se raspa la web? | | 2021-08-11
  • Raid-Protect-Discord-Bot

    A Discord Bot that allows you to protect your Discord server with captcha, anti profanity, anti nudity image, anti spam, account age required, logs...

    Project mention: Discord Bot that allows you to protect your Discord server with captcha, anti profanity, anti nudity image, anti spam, account age required, logs... | | 2021-09-02
  • 2captcha-python

    Python 3 package for easy integration with the API of 2captcha captcha solving service to bypass recaptcha, hcaptcha, funcaptcha, geetest and solve any other captchas.


    2captcha is a program for solving captchas. It spares us all the heartaches by solving captchas using human intelligence. Some humans are on standby waiting to solve your captchas. It delivers solved captchas fast and takes less than 12 seconds. It is extremely affordable too, costs 0.5 dollars for 1000 solved captchas.

  • DNTCaptcha.Core

    DNTCaptcha.Core is a captcha generator and validator for ASP.NET Core applications

    Project mention: .NET 5 Generate Captcha image | | 2022-02-19

    I've looked at DNTCaptcha but it seems to be in the same situation as Edi.Captcha.

  • friendly-pow

    The PoW challenge library used by Friendly Captcha

    Project mention: Business owners with contact me website pages: What is your "self host" captcha solution? | | 2022-02-14

    It kinda does? Here's the puzzle creator library:

  • shellfirm

    Intercept any risky patterns (default or defined by you) and prompt you a small challenge for double verification

    Project mention: Shellfirm is a handy utility to help avoid running dangerous commands with an extra approval step. You will immediately get a small prompt challenge that will double verify your action when risky patterns are detected. | | 2022-01-12
  • SliderCaptcha

    Slider captcha support mobile

    Project mention: I want to integrate Captcha on some of the pages in my self hosted applications. Can you suggest a self hosted Captcha solution ? I don't want to use Google Recaptcha or route my pages thru Cloudflare. | | 2022-04-06


NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2022-05-23.

Captcha related posts


What are some of the best open-source Captcha projects? This list will help you:

Project Stars
1 buster 4,803
2 undetected-chromedriver 1,978
3 recaptcha 1,847
4 captcha 1,579
5 no-captcha 1,542
6 base64Captcha 1,447
7 svg-captcha 1,441
8 django-simple-captcha 1,236
9 challenge-bypass-extension 968
10 invisible_captcha 930
11 PHPAuth 835
12 lc-core 350
13 authx 299
14 friendly-challenge 284
15 recaptcha-module 210
16 react-hcaptcha 197
17 python-anticaptcha 186
18 Raid-Protect-Discord-Bot 170
19 2captcha-python 168
20 DNTCaptcha.Core 166
21 friendly-pow 158
22 shellfirm 155
23 SliderCaptcha 139
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