About Altcha
Altcha is a spam and abuse protection solution for websites and apps, offering a privacy-friendly Captcha and other tools designed with GDPR compliance to provide strong security while safeguarding user privacy.
How Altcha compares
- #1
Keybase9.2k - #2Hanko9k
- #3Altcha2.7k
- #4
Friendly Captcha450 - #5
Slider Captcha306 - #6
Limit Login Attempts Reloaded5
412k npm downloads, last 30 days
#3 of 6 Security we have counts for (of 86) · bars are GitHub stars across these neighbours; the category leader is Keybase at 9.2k · as of August 25, 2026
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#3 of 6 Security
#2 of 6 Security
The two numbers disagree - one leads on stars, the other on installs. Stars measure attention, downloads measure use.
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How we audit Altcha
We measure the detected version against Altcha's release history and grade the surrounding stack with a Lighthouse-grade quality audit. Weak or outdated links weigh more - one risky dependency can pull the whole score down.
How the score worksMore technologies in Security
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