mCaptcha
Block bots without image puzzles: a self-hosted Rust CAPTCHA server whose proof of work gets harder as traffic rises. Its only release dates from March 2024.
// PROOF-OF-WORK
4 entries tagged with "proof-of-work"
// COMPARISONS
1// ENTRIES
3 entries
ALTCHA
Blocks form bots without image puzzles or cookies: an accessible MIT proof-of-work widget, server libraries in 11 languages. Risk-based checks cost extra.
Cap
Stops bots without image grids: the browser solves a proof of work and a Docker server you run checks it, with no cookie and no profiling. Apache 2.0.