reCAPTCHA is a free service that protects your site from spam and abuse, using risk analysis techniques to tell humans and bots apart.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Online
United States
TrustSig Alternatives
Apps similar to TrustSig include reCAPTCHA, which has a free version. Other options are Private Captcha, ALTCHA, Cloudflare Turnstile and hCaptcha. You can choose from more than 10 Anti-Spam Tools like TrustSig for the web and self-hosting.
Alternatives list
- 35 reCAPTCHA alternatives
Private Captcha is an independent, privacy-first, self-hostable Proof-of-Work CAPTCHA service made in EU. Instead of asking users to solve complex puzzles or track their behavior, Private Captcha solves an invisible cryptographic task in the background.
Cost / License
- Free Personal
- Proprietary
Application type
Platforms
- Online
- Self-Hosted
- Docker
Estonia
EU
+1
26 ALTCHA alternativesALTCHA is a privacy-first solution built to help developers and website owners stop bots, spam, and automated abuse — without making things harder for real users. It replaces traditional CAPTCHA systems with a smarter, quieter approach to verification and threat detection.
Czechia- EU
Turnstile is Cloudflare's smart CAPTCHA alternative. It automatically chooses from a rotating suite of non-intrusive browser challenges based on telemetry and client behavior exhibited during a session.
Cost / License
- Free
- Proprietary
Platforms
- Online
- JavaScript
- Software as a Service (SaaS)
Friendly Captcha is an invisible CAPTCHA and bot protection solution that helps block bots and spam with privacy-first proof-of-work-without image or audio puzzles, cookies, or user tracking. GDPR- and CCPA-compliant and TÜV-certified as conformant with WCAG 2.
Germany- EU
TrustCaptcha is a privacy-first, invisible CAPTCHA that protects your website from bots and spam—without disrupting your users.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Online
- Spring
- Kotlin
- Rust
- Ruby
- Python
- .NET Framework
- Craft CMS
- React
- Groovy
- JavaScript
- Angular
- Software as a Service (SaaS)
- Scala
- PHP
- Go (Programming Language)
- Typescript
- Java
- Wordpress
- Node.JS
- Vue.js
- Germany
- EU
+4
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Software as a Service (SaaS)
South Korea
+4
MTCaptcha is a smart captcha service that prioritizes privacy and accessibility. It offers an adaptive invisible noCaptcha that is easy for humans but hard for bots, making verification frictionless. MTCaptcha is GDPR and WCAG compliant, ensuring that your data is never sold or...
Cost / License
- Freemium
- Proprietary
Platforms
- Software as a Service (SaaS)
Canada
+2
Cost / License
- Free
- Open Source
Platforms
- Self-Hosted
India
