Letsencrypt GitHub Repositories (2026) · Open Source Tools

Yet another WebUI for Nginx

Minimalist and opinionated feed reader

The Cloud Native Application Proxy

High performance, minimalist Go web framework

Automatically provision and manage TLS certificates in Kubernetes

Let's Encrypt/ACME client and library written in Go

A simple cross platform ACME client (for use with Let's Encrypt et al.)

Automated ACME SSL/TLS certificate management built around Azure Key Vault

A modern, high-performance web server and reverse proxy built on Pingora Cloudflare Pingora's raw performance, wrapped in Caddy's minimalist developer experience

PowerShell module and ACME client to create certificates from Let's Encrypt (or other ACME CA)

Dynamic reverse proxy based on NGINX OpenResty with an API

A class to validate SSL certificates

A client implementation for the Automated Certificate Management Environment (ACME) protocol

Self-hosted certificate authority with a web UI: ACME, SCEP, EST, OCSP, CRL, SSH CA, Windows autoenrollment and network discovery.

The Let's Encrypt certificate manager for rails

A small self-hosted web UI to manage an HAProxy configuration, obtain Let's Encrypt certificates, and run an active-passive cluster with Keepalived on a shared virtual IP

Distributed, centrally-controlled Web Application Firewall built on pingap & Cloudflare Pingora. Semantic attack detection, Cloudflare-style rules, CC & Bot defense, automatic TLS, embedded i18n dashboard.