Freedom251 › Web Server Software
Puma
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Puma | Open-source Ruby/Rack web server · BSD 3-Clause license | Free |
As puma.io lists them, read 7 Oct 2026. The maker's own page has the final word.
Facts from Puma's own pages
- Concurrency
- Puma serves requests in separate threads and can use pre-forked worker processes in cluster mode. · puma.io, 7 Oct 2026
- Deployment
- The deployment guide says Puma can be used as a development server, though most users run it in production deployments. · puma.io, 7 Oct 2026
- Founded
- 2011 · puma.io, 28 Sept 2026
- Frameworks
- Puma is the default server for Ruby on Rails and can also run Sinatra applications. · puma.io, 7 Oct 2026
- Integrations
- The documentation lists community plugins for exporting metrics to Prometheus and sending metrics to StatsD. · puma.io, 7 Oct 2026
- License
- Puma is licensed under the BSD 3-Clause license. · puma.io, 7 Oct 2026
- Monitoring
- Puma includes a built-in status and control app, and its docs describe using process monitors such as systemd or rc.d. · puma.io, 7 Oct 2026
- Product
- Puma is a fast, concurrent HTTP 1.1 server designed for Ruby/Rack applications. · puma.io, 7 Oct 2026
- Ruby implementations
- Puma works with MRI Ruby and JRuby, and the documentation also names TruffleRuby as a truly parallel Ruby implementation. · puma.io, 7 Oct 2026
- Security support
- The security policy supports the latest release in the 8.x and 7.x series and marks all other releases unsupported. · github.com, 7 Oct 2026
- SSL requirement
- Puma supports SSL sockets when OpenSSL development files are installed; without them, it installs but does not allow SSL connections. · puma.io, 7 Oct 2026
- Standalone
- Puma supports SSL, zero-downtime rolling restarts, and a built-in request bufferer, allowing deployment without a reverse proxy. · puma.io, 7 Oct 2026
- Vulnerability reporting
- The security policy directs vulnerability reports to GitHub or Evan Phoenix. · github.com, 7 Oct 2026
- Windows limitation
- Cluster mode is not supported on Windows because it lacks fork(2). · puma.io, 7 Oct 2026
Where Puma stands on Freedom251
- Web Server Software#23 of 36