Top 5 Open-Source Alternatives to acme.sh

The top open-source alternatives to acme.sh are Let's Encrypt, Stalwart Labs, and Caddy. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Let's Encrypt Landing Page
1

Let's Encrypt

Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
Pricing:
- Open Source
#Identity And Access Management #Two Factor Authentication #Security & Privacy 312 social mentions
Stalwart Labs Landing Page
2

Stalwart Labs

Modernize your mail server
Pricing:
- Open Source
- Free
#Email #Email Service #Mail Server 3 social mentions
Caddy Landing Page
3

Caddy

The HTTP/2 Web Server with Automatic HTTPS
Pricing:
- Open Source
#Web Servers #HTTP/2 Web Server #Web And Application Servers 226 social mentions
nginx Landing Page
4

nginx

A high performance free open source web server powering busiest sites on the Internet.
Pricing:
- Open Source
#Web And Application Servers #Web Servers #Application Server 46 social mentions
Nginx Proxy Manager Landing Page
5

Nginx Proxy Manager

Docker container and built in Web Application for managing Nginx proxy hosts with a simple, powerful interface, providing free SSL support via Let's Encrypt
Pricing:
- Open Source
#Load Balancers #Proxy #Web Servers 289 social mentions