acme.sh is a pure Unix shell ACME protocol client that automates issuing, renewing and installing SSL/TLS certificates from CAs like ZeroSSL and Let's Encrypt, with no Python dependency and support for many DNS APIs and web servers.
Developer toolsSelf-hostedCLI & terminal
Certimate is a free, open-source self-hosted ACME tool that automates the full SSL certificate lifecycle—issuance, deployment, renewal, and monitoring—through a visual workflow, with support for 70+ DNS providers and 160+ deployment destinations.
Self-hostedAutomationServer management