Proof-of-Work · Invisible
ALTCHA
Daniel Regeci / community · Self-hosted (any) · since 2023-09
MIT-licensed proof-of-work widget you can drop in and forget. No external servers required, no signups, no tracking. The privacy-first community choice that has been popping up everywhere since late 2024.
Open sourceSelf-hostableFree
Free quota
Unlimited (self-host) or hosted plan
Pricing
Self-hosted free, ALTCHA Pro from $9/mo for hosted
// pros
- + No external service required
- + Trivially auditable code
- + Works without JavaScript fallback for some setups
// cons
- − No central threat data, so harder bots can solve PoW too
- − No managed dashboard or analytics
- − Smaller community than commercial alternatives
// highlights
- ▸MIT licensed, fully open source
- ▸Self-host with zero dependencies
- ▸No cookies, no fingerprinting
- ▸Native HTML form input
- ▸Server libraries in 8+ languages
// specs
- Pricing
- free
- Open source
- Yes
- Self-host
- Yes
- Audited
- Not yet
- HQ
- Self-hosted (any)
- Since
- 2023-09
- License
- MIT
- Frameworks
- 9 supported