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ALTCHA

ALTCHA is a free CAPTCHA alternative that uses a proof-of-work mechanism to protect your website, and online services from spam.

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 compliant with GDPR.

(0 reviews)
Pricing:
  • Open Source
  • Free
Platforms:
  • Web
  • REST API
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ALTCHA
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ALTCHA Reviews and Details

This page is designed to help you find out whether ALTCHA is good and if it is the right choice for you.

#Security & Privacy #SPAM Protection #Anti-Spam #Captcha #SPAM API

Screenshots and images

  • ALTCHA Simple, user-friendly verification.
    Simple, user-friendly verification. //
    2024-04-30

Features & Specs

  1. Privacy-friendly, GDPR compliant

    No cookies, no tracking, no external servers.

  2. Frustration-free

    No visual puzzles. PoW Captcha is better for people.

  3. Spam Filtering

    Employs machine learning to categorize submitted data and identify unwanted messages.

  4. Open-source

    Free to use, free to modify. MIT licensed.

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Questions & Answers

As answered by people managing ALTCHA.

  1. What makes ALTCHA unique?

    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.

  2. Why should a person choose ALTCHA over its competitors?

    Here are some key reasons why a person should choose ALTCHA over its competitors:

    • Privacy compliance - ALTCHA is fully compliant with privacy regulations like GDPR since it does not use cookies, fingerprinting or track users. This is a major advantage over other captcha solutions.
    • Open source and self-hosted - ALTCHA is free, open source software that can be self-hosted without relying on external services. This gives more control and independence to the user.
    • Accessible design - ALTCHA uses a proof-of-work mechanism instead of puzzles or captchas, making it more friendly and accessible for humans. Captchas can be difficult for some users.
    • Machine compatibility - ALTCHA is designed to also work for machines and APIs, making services accessible for bots and automated systems. Other solutions may not be as compatible.
    • Modern approach - ALTCHA represents a privacy-first, inclusive approach to spam protection as opposed to traditional captcha methods. This future-proofs the solution.
    • Effective spam filtering - In addition to proof-of-work, ALTCHA also offers an effective spam filter module to block sophisticated spam attacks. This provides comprehensive protection.

    So in summary, ALTCHA's privacy compliance, open design, accessibility, machine compatibility and modern approach give it clear advantages over competing captcha solutions.

  3. Which are the primary technologies used for building ALTCHA?

    JavaScript and Svelte.

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Is ALTCHA good?

External links

We have collected here some useful links to help you find out if ALTCHA is good.

  • Public traffic stats of ALTCHA

    Check the traffic stats of ALTCHA on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.

  • Domain Rating (DR)

    Check the "Domain Rating" of ALTCHA on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of ALTCHA's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.

  • Domain Authority (DA)

    Check the "Domain Authority" of ALTCHA on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.

  • Public opinion on Reddit

    The latest comments about ALTCHA on Reddit. This can help you find out how popualr the product is and what people think about it.

Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about ALTCHA and what they use it for.
  • A self-hosted Google reCAPTCHA alternative (we ship it)
    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 / 2 months ago
  • Why Proof-of-Work Beats CAPTCHA for Form Protection
    Here's how PoW works for form protection (using the ALTCHA wire format):. - Source: dev.to / 4 months ago
  • Wicketkeeper โ€“ privacy-friendly, self-hostable PoW CAPTCHA
    Go based, similar to JS based ALTCHA https://altcha.org/ discussed at https://news.ycombinator.com/item?id=43971068. - Source: Hacker News / 7 months ago

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ALTCHA discussion

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  1. Bhavik chavda avatar
    Bhavik chavda
    ยท almost 2 years ago
    ยท Reply

    Altcha is the best free alternative to Recaptcha. It's advanced too. It has facility to identify humans without showing captcha.

ALTCHA alternatives

Is ALTCHA good? This is an informative page that will help you find out. Moreover, you can review and discuss ALTCHA here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.

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