Best proof of work plugins for WordPress
The most popular proof of work plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. OpenPorte Spam Protection leads with 600+ active installs, ahead of Privacy CAPTCHA for Cap (100+) and GateCHA CAPTCHA (100+). All 7 plugins tagged “Proof of Work” are below, with figures from WordPress.org that update every day.
Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.
Research this niche or see all plugins.
Top 7 proof of work plugins
- 1.
OpenPorte Spam ProtectionThe most installed proof of work plugin, with 600+ active installs. Rated 5.0 from 5 reviews, updated 1 day ago.
- 2.
Privacy CAPTCHA for Cap100+ active installs. No reviews yet, updated 1 week ago.
- 3.
GateCHA CAPTCHA100+ active installs. No reviews yet, updated 2 weeks ago.
- 4.
CardeaFewer than 10 active installs. No reviews yet, updated 2 months ago.
- 5.
CrovlyFewer than 10 active installs. No reviews yet, updated 6 months ago. Tested only up to WordPress 6.9.11.
- 6.
HashCashFewer than 10 active installs. No reviews yet, updated 4 months ago.
- 7.
Anonympins Bot Mitigation with Proof-of-WorkFewer than 10 active installs. No reviews yet, updated 3 weeks ago.
All 7 plugins tagged “Proof of Work”
OpenPorte Spam Protection
Up in the last 7 days:483#8,361by J-C Berthon1 day ago
Stop spam without CAPTCHAs. Proof-of-Work protection for your forms and logins. Open-source, self-hosted, privacy-first.
- Installs
- 600+
- Rating
- 5.0(5)
- Downloads
- 108/day
Privacy CAPTCHA for Cap
Up in the last 7 days:756#13,146by zirkel.design12 days ago
Privacy-friendly spam protection for comments, login, registration, WooCommerce, and Gravity Forms, powered by your own Cap server.
- Installs
- 100+
- Rating
- –
- Downloads
- 12/day
GateCHA CAPTCHA
Up in the last 7 days:275#16,230by gatecha16 days ago
Self-hosted ALTCHA proof-of-work CAPTCHA via GateCHA. Protects WordPress forms without cookies, fingerprinting, or third-party services.
- Installs
- 100+
- Rating
- –
- Downloads
- 11/day
Cardea
#63,411by omikheev2 months ago
Lightweight, zero-dependency Proof-of-Work anti-spam protection for WordPress comments.
- Installs
- <10
- Rating
- –
- Downloads
- 0/day
Crovly
Down in the last 7 days:2,851#65,908by crovly6 months ago
Privacy-first, Proof of Work captcha for WordPress. No image puzzles, no tracking. 22+ integrations included.
- Installs
- <10
- Rating
- –
- Downloads
- 0/day
HashCash
Down in the last 7 days:14,730#67,957by RicheyWeb4 months ago
Invisible Proof-of-Work CAPTCHA. No checkboxes, no image grids, no Google, no tracking. Just spam protection that gets out of the way.
- Installs
- <10
- Rating
- –
- Downloads
- 2/day
Anonympins Bot Mitigation with Proof-of-Work
Down in the last 7 days:2,797#71,943by anonympins26 days ago
High-performance client-side anti-bot protection and Proof-of-Work challenge verification for WordPress without third-party CAPTCHA.
- Installs
- <10
- Rating
- –
- Downloads
- 0/day