Since AI-driven apps become more popular, developers are looking for the best free CAPTCHA sources that allow users to check whether a user is a human. It allows minimizing spam and malicious activity.
Many people also want to find a CAPTCHA solver that allows them to fully automate various tasks, such as parsing data from a website. Nowadays, plenty of integrated solutions for Application Programming Interfaces (API) and services can detect and bypass CAPTCHA.
Verdict: This service allows you to use CAPTCHAs with text and audio that are compatible with HTML formats. A user will see a randomly generated CAPTCHA text. Then, they can enter this text into the special field. It will make your website accessible to humans and protect it from bots. Even if someone uses the best artificial intelligence software, it will be difficult for them to decode the text automatically.
Verdict: If you want to protect your site from spam, take a closer look at Friendly Captcha. It’s easy to use and guarantees user privacy. This service is based on innovative technology that allows you to securely protect your websites and online services from spam and bots.
Friendly Captcha doesn’t track user activity or store their data. With it, you no longer need to solve many tasks manually. It will generate a unique cryptography puzzle for each visitor. As soon as people start filling out a form, a cryptogram will get solved automatically.
Verdict: This PHP script with an open-source code can be used for generating complex CAPTCHA images and codes for protecting your online forms from spam and malicious users. With Securimage, you can protect the existing forms on your website from spambots.
It’s compatible with virtually any web server if you have PHP with an integrated GD library installed. This open source CAPTCHA solver can cope with every task, from generating images to verifying a user’s response. Thanks to a special technology, it can generate audio codes and play them in a browser with the help of screen readers for visually impaired users.
Verdict: hCaptcha was developed for solving the most difficult machine-learning task, namely, quick labeling of large datasets. It protects the confidentiality of user data, rewards sites and helps companies label their data, which makes it a perfect alternative to reCAPTCHA. hCaptcha uses the HUMAN Protocol that is based on the Ethereum blockchain.
Verdict: This fully automated Java solution will prevent bots from accessing your site. While the JCaptcha project is no longer supported, it has a functioning library that allows you to create high-quality CAPTCHA in 3 formats. It has powerful functionality as well. JCaptcha API enables you to create your own CaptchaEngine and select the way your CAPTCHA will be generated and displayed.
Verdict: CAPTCHAs.IO is a useful service for automatic CAPTCHA recognition that supports over 30,000 image and audio codes as well as reCAPTCHA v2 and v3, including invisible reCAPTCHA. This is one of the best free CAPTCHA sources since you can use it as a browser extension for Chrome. This API provides RESTful access to all captcha-solving methods. Developers can select API responses in JSON or text format.
Verdict: This browser extension helps users solve the complex CAPTCHA and supports speech recognition for solving audio reCAPTCHA tasks. You can solve various issues by pressing the Buster button below the reCAPTCHA widget. This project was developed to make it easier to solve CAPTCHA and allow people to use solutions implemented in many automated systems.
Verdict: Death by Captcha is a reliable service that will help you bypass any CAPTCHA. Users pass their CAPTCHAs via the API where they are solved either manually or automatically with the help of the best OCR software for Mac or Windows systems. Then, the solved CAPTCHA is sent back, after which you can use it. The API of this open source CAPTCHA solver has an average reply time of 9 seconds and 90% accuracy.
Verdict: If you have any issues with installing C ++ addons or if you don’t want to use Google reCAPTCHA, the Massachusetts Institute of Technology has developed its own licensed SVG-captcha. It has extensive functionality. For instance, a portal in India that was developed for people who want to register for vaccination used the SVG-captcha library with the open-source code to prevent bots from accessing the site.
Verdict: The Anti-Captcha service allows you to solve captchas with the help of human workers. Its API enables users to integrate authentication solutions with apps via HTTP POST and API Key. You can load CAPTCHA and get ID, request and receive CAPTCHA responses. By using this service, you help thousands of workers to earn money for their families.