Certbot

By Electronic Frontier Foundation ยท SSL and certificates

About Certbot

EFF's ACME client that gets and renews Let's Encrypt certificates and can configure Apache or NGINX.

Details

  • Free plan or free to use

    Yes

  • Open source

    Yes

  • Runs on your own server

    Yes

Not enough info yet on has an API, built for WordPress sites. Check the tool's own site.

Listing written by HostMomentum, checked 2026-11-03. Report a correction or request removal. Back to ssl and certificates.

More tools in ssl and certificates

Let's Encrypt

by Internet Security Research Group

Free, automated certificate authority that issues TLS certificates through the ACME protocol.

  • Free plan or free to use

acme.sh

Shell-script ACME client that issues and renews certificates, with many DNS provider APIs for wildcard certificates.

  • Free plan or free to use
  • Open source
  • Runs on your own server

cert-manager

Kubernetes add-on that issues and renews certificates from ACME and other issuers for cluster workloads.

  • Free plan or free to use
  • Open source
  • Runs on your own server

ZeroSSL

Certificate authority offering free and paid certificates, with ACME support and a dashboard for manual issuance.

  • Free plan or free to use
  • Has an API

Caddy

Open-source web server that gets and renews HTTPS certificates automatically for the sites it serves.

  • Free plan or free to use
  • Open source
  • Runs on your own server

Sectigo

Commercial certificate authority selling DV, OV and EV certificates, with management tools for large estates.