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Buy license

Bot protection
you host yourself

Private Captcha is a user-friendly solution that protects forms and APIs from abuse and is too costly for bots to bypass.

Buy license Quick start

Same great features

Access same features as with the managed solution at privatecaptcha.com, but on your premises.

  • Smart difficulty scaling. Automatic adjustment of captcha challenge complexity in real time.
  • Audit logs. Easy compliance with account audit history.
  • Platform API. Automate creation, editing, or deletion of orgs and domains via HTTP API.
  • Usage statistics. Domain- and account-level statistics of captcha requests and verifications.
  • Widget customization. Different visual themes, more than 10 localizations, popup/hidden modes and more.

Don't want to take care of self-hosting? Use the managed version.

Designed for humans, not machines

Lightweight
Our script is 7% of the size of Google reCAPTCHA script
Enhanced accessibility
Multiple languages, screen reader friendly, WCAG 2.2 compliant
No frustrating puzzles
Does not depend on cognitive abilities of the user
No personal data tracking
Our Privacy Policy is simple - no personal data is collected

Try it yourself

Simple pricing

Commercial use of the self-hosted Private Captcha requires a license and is subject to the EULA.

Community Edition

€19 /month

  • Commercial use allowed
  • Full data ownership
  • Unlimited properties / 1 org
  • Unlimited requests

Price does not include VAT

Enterprise Edition

€99 /month

Price does not include VAT

Frequently Asked Questions

How does Private Captcha technology work?
Instead of asking users to solve complex puzzles or track their behavior, Private Captcha solves an invisible cryptographic task in the background. The system automatically adjusts the task difficulty, ensuring smooth access for real users while making it too costly for bots to attempt. Cryptographic task provides equal security regardless of bot's intelligence level, making it effective even as AI technology improves. Which is hard to say about image/sound recognition tasks of other captchas.
How does Private Captcha tell bots and users apart?
On scale, bots exhibit different usage patterns and fingerprints statistics than real users. Detection of those patterns is part of the Private Captcha solution.
What consitutes a "commercial use" of Private Captcha?
Private Captcha is considered to be used commercially when client integrations (website widget or client SDKs), connected to your installation, are used by for-profit legal entities or on websites that sell products or services. See license for details.
Can I run multiple instances of Private Captcha with a single license?
One license allows for a single installation of Private Captcha.
Is support included?
Email support during our business hours is included with Enterprise license only. Additional support services (e.g. setup help) are billed separately.
What about cancellations and refunds?
You can cancel your subscription at any time. Prepaid fees for monthly pricing are non-refundable.
Can self-hosted Private Captcha be white-labeled?
While you can integrate self-hosted Private Captcha to your website or client application, it cannot be part of an offering where it forms a substantial part of the service or that competes with our managed offering.
Can I use a custom hostname (CNAME) for API without self-hosting?
Yes, you can use our SaaS API (e.g. api.privatecaptcha.com) via your own domain (e.g. privatecaptcha-api.mydomain.com). You can configure it in the Portal or contact support for more information.
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