rucaptcha-js is a JavaScript library designed to interact with the RuCaptcha system. It allows developers to convert image CAPTCHAs to Base64 and retrieve solutions in JSON format.

Yes, the library itself is free and open-source, but you’ll still need to pay for a third-party CAPTCHA-solving service (like RuCaptcha or CaptchaAI) to get actual results.

No. It primarily supports image-based CAPTCHAs. For more advanced CAPTCHA types (like reCAPTCHA v2/v3 or GeeTest), the library must be extended or paired with a compatible service.

Yes! CaptchaAI fully supports rucaptcha-js-style CAPTCHAs and offers an easy integration path. You can submit Base64 images directly and get fast JSON responses.

RuCaptcha often suffers from high latency and inconsistent solve rates, especially during peak hours. CaptchaAI provides a faster, more stable, and modern alternative—ideal for scaling applications.

Simply modify your request endpoint from RuCaptcha’s to https://ocr.captchaai.com/in.php, set method=base64, and include your CaptchaAI key. Full guide: CaptchaAI for rucaptcha-js

Yes. Just add json=1 in your form parameters to receive structured JSON responses, similar to rucaptcha-js’s expectations.

CaptchaAI boasts higher uptime, global distribution, and real-time task monitoring—features RuCaptcha lacks or underperforms in. It’s a future-proof alternative for developers hitting bottlenecks with RuCaptcha.

Rucaptcha-js itself doesn't impose limits, but CaptchaAI offers thread-based concurrency. Ensure your plan supports the solve volume you need. See pricing

CaptchaAI typically responds in 2–8 seconds, while RuCaptcha can exceed 15 seconds during load spikes. For high-performance apps, CaptchaAI offers a notable edge.