defunkt/unicorn

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1479 stars · 269 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Unicorn is a Rack HTTP server for Ruby applications, designed for fast clients on low-latency, high-bandwidth Unix connections. It manages worker processes with kernel-based load balancing and requires a reverse proxy like nginx in front of it for slow clients.

Use cases

• serve a rack application in production
• run a ruby web app behind nginx
• host a rails app with multiple worker processes
• deploy a ruby app with zero-downtime upgrades
• serve http requests from a unix socket
• manage ruby app worker processes automatically

When to choose

• you need a battle-tested rack server for fast clients on a unix system
• your app is not thread-safe and you want isolated worker processes
• you want zero-downtime binary upgrades and systemd socket activation
• you already have nginx or another fully buffering reverse proxy

When to avoid

• clients connect directly without a buffering reverse proxy
• you need to serve slow clients or long-lived connections like websockets
• you want a threaded or async server model
• you are not on a unix-like operating system

Facets

service · maturity maintenance

http-server web-framework middleware web-development backend developer-tools bsd ruby rack ruby-http-server unix process-management reverse-proxy-required forking-server linux macos web-server

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