
reCAPTCHA
hCaptcha
Cloudflare Turnstile
Akismet
Private Captcha
mosparo
Cap Captcha
ALTCHA is a free CAPTCHA alternative that uses a proof-of-work mechanism to protect your website, and online services from spam.

Learn JavaScript
Learn Git Branching
Deno
Bun.sh
Bootstrap
Learn in an interactive environment.

Which is more popular?
Based on our record, React Tutorial should be more popular than ALTCHA. It has been mentioned 18 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | altcha.org | react-tutorial.app |
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In their own words, as submitted to SaaSHub.


ALTCHA uses a proof-of-work mechanism to protect your website, APIs, and online services from spam and unwanted content. Unlike other solutions, ALTCHA is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully...
No description of React Tutorial yet.
What each product offers, as listed by its team.


No features have been listed yet.
Walkthroughs and reviews on video.
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React Tutorial for Beginners
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing ALTCHA and React Tutorial.
ALTCHA's answer
What makes ALTCHA unique is that it is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR. Unlike other captcha solutions, ALTCHA does not require users to solve puzzles or captchas and uses a proof-of-work mechanism instead.
ALTCHA's answer
Here are some key reasons why a person should choose ALTCHA over its competitors:
So in summary, ALTCHA's privacy compliance, open design, accessibility, machine compatibility and modern approach give it clear advantages over competing captcha solutions.
ALTCHA's answer
JavaScript and Svelte.
ALTCHA's answer
Our primary audience for ALTCHA Forms includes enterprises, medium and small businesses, non-profits, and individuals who need a reliable, secure, and compliant solution for data collection and management. Whether you're a large corporation dealing with extensive regulatory requirements, a small business looking to protect customer and employee data, a non-profit organization managing sensitive information, or an individual seeking robust data security, ALTCHA Forms provides the tools and features necessary to meet your needs. With a focus on compliance, user-friendly design, and advanced security measures, our platform is tailored to support diverse users in navigating complex regulatory landscapes and ensuring data protection.
Share your experience with using ALTCHA and React Tutorial. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


ALTCHA won on the boring things. It is open source, self-hosted and collects nothing, and it ships official libraries in both Go and PHP, the two languages our two layers already speak. So the same protocol runs twice on every store, by... - Source: dev.to / 6 days ago
The captcha on orkestr is Altcha. Self-hosted, no third-party JS, no Google, no behavioral tracking. Users don't see a puzzle. There's a single checkbox and a quiet "verifying..." while the browser does some math. About a second, total. - Source: dev.to / 5 months ago
Here's how PoW works for form protection (using the ALTCHA wire format):. - Source: dev.to / 6 months ago
I just wanted to know if anybody took both or the react-tutorial.app course. I mostly like the flashcards part of the course. I was thinking of taking the Scrimba course and just using the other courses study materials. Source: about 3 years ago
The Jad Joubran courses on the other hand really upped my skill level and helped me make the jump from passive learning, exercises and very small projects to making legitimate web apps. That was probably the biggest/scariest jump I've... Source: over 3 years ago
I learned through https://react-tutorial.app/ and absolutely loved it. I'm also a hands-on guy. Source: over 3 years ago
When comparing ALTCHA and React Tutorial, you can also consider the following products.

reCAPTCHA is a free security service that protects your websites from spam and abuse.
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Learn JavaScript with guided tests and flashcards
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Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
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"Learn Git Branching" is the most visual and interactive way to learn Git on the web; you'll be challenged with exciting levels, given step-by-step demonstrations of powerful features, and maybe even have a bit of fun along the way.
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Cloudflare's service for any company to replace CAPTCHAs and deliver a better experience to web visitors.
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A secure runtime for JavaScript and TypeScript built with V8, Rust, and Tokio.
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