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What is Unicorn?

Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request and response in between Unicorn and slow clients.
Unicorn is a tool in the Web Servers category of a tech stack.
Unicorn is an open source tool with 1.4K GitHub stars and 257 GitHub forks. Here’s a link to Unicorn's open source repository on GitHub

Who uses Unicorn?

Companies
207 companies reportedly use Unicorn in their tech stacks, including Shopify, Instacart, and GitHub.

Developers
266 developers on StackShare have stated that they use Unicorn.

Unicorn Alternatives & Comparisons

What are some alternatives to Unicorn?
Puma
Unlike other Ruby Webservers, Puma was built for speed and parallelism. Puma is a small library that provides a very fast and concurrent HTTP 1.1 server for Ruby web applications.
Unicorns
Live stream your iPhone or iPad screen. Produced by Lookback.
NGINX
nginx [engine x] is an HTTP and reverse proxy server, as well as a mail proxy server, written by Igor Sysoev. According to Netcraft nginx served or proxied 30.46% of the top million busiest sites in Jan 2018.
Apache HTTP Server
The Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server. Originally designed as a replacement for the NCSA HTTP Server, it has grown to be the most popular web server on the Internet.
Microsoft IIS
Internet Information Services (IIS) for Windows Server is a flexible, secure and manageable Web server for hosting anything on the Web. From media streaming to web applications, IIS's scalable and open architecture is ready to handle the most demanding tasks.
See all alternatives

Unicorn's Followers
334 developers follow Unicorn to keep up with related blogs and decisions.