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Let’s Encrypt uses the ACME protocol to verify that you control a given domain name and to issue you a certificate. To get a Let’s Encrypt certificate, you’ll need to choose a piece of ACME client software to use.

Recommended: Certbot

We recommend that most people start with the Certbot client. It can simply get a cert for you or also help you install, depending on what you prefer. It’s easy to use, works on many operating systems, and has great documentation.

Other Clients

If certbot does not meet your needs, or you’d simply like to try something else, there are many more clients to choose from, listed on the main Let’s Encrypt website grouped by the language or environment they run in.

These ACME clients are offered by third parties. Let’s Encrypt does not control or review third party clients and cannot make any guarantees about their safety or reliability.

If you’d like to add a client to the list, please open a pull request on GitHub.

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Clients
Aerys: https://github.com/kelunik/aerys-acme

Libraries
PHP: https://github.com/kelunik/acme

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Here’s mine:

letsencrypt-win-simple

It uses this library that also has a powershell client:

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Here’s mine - is technically a client if i just integrate the official LE client into my web stack’s Nginx vhost shell based wizard ?

Client:

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And another python one (< 200 lines): https://github.com/diafygi/acme-tiny/

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Clients
PHP (via Webroot): https://github.com/kelunik/acme-client

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Here’s mine. Can also be used as a library.

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No code there https://github.com/hlandau/acme.t

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It’s the build environment. The source is here: https://github.com/hlandau/acme

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Web-based ACME w/ OpenSSL Commands: -

  1. https://letsgetssl.com/
  2. https://letsgetssl.net/
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Shell script version (with a little Perl) at https://github.com/lukas2511/letsencrypt.sh

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Go version at https://github.com/xenolf/lego

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isn’t that already on the list ? :slight_smile:

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Based upon the Ruby library acme-client, i’ve created a command line tool:

letsencrypt-cli

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Ruby on Rails plug-in with handling chalenge-response (http01) and storing certificates to given directory

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There’s also apparently https://github.com/hlandau/acme (called acmetool and written in Go).

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Hello, I wrote another shell script:

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found letsencrypt wordpress plugin https://github.com/tollmanz/lets-encrypt-wp

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Hi, I wrote simplified PHP class https://github.com/analogic/lescript

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