Open source letsencrypt projects
Every project in the registry tagged letsencrypt, ranked by real GitHub adoption.
The Cloud Native Application Proxy
🛡️ Open-source and cloud-native Web Application Firewall (WAF)
Limited DNS server with RESTful HTTP API to handle ACME DNS challenges easily and securely.
Industry-leading free, high-performance, AI and semantic technology Web Application Firewall and API Security Gateway (WAAP) - UUSEC WAF.
Automatically create and renew website certificates for free using the Let's Encrypt certificate authority.
Production NGINX made simple: secure defaults, terminal‑first, performance‑obsessed. The production standard for modern PHP and Web developers. Elevating the ec
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Frequently asked questions
How many open source letsencrypt projects are there?
This registry tracks 6 projects tagged letsencrypt, with 82,951 GitHub stars between them. The most-adopted is traefik at 65,431 stars.
Are these letsencrypt projects free to use?
Yes — 6 of the 6 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which letsencrypt project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these letsencrypt projects still maintained?
5 of the 6 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.