# Sinatra

Ruby DSL for building web applications with a small set of route definitions, run on a Rack server.


Source: https://findsoftware.frbit.cloud/sinatra/
Last reviewed: 2026-10-26
Listed since: 2026-10-26

## Record

### Links

- home: https://sinatrarb.com
- repository: https://github.com/sinatra/sinatra
- docs: https://sinatrarb.com/documentation.html
- discord: https://discord.gg/ncjsfsNHh7
- forum: https://groups.google.com/forum/#!forum/sinatrarb

### Identity

- status: active
- maintainer: Blake Mizerany, Ryan Tomayko, Simon Rozet, Konstantin Haase
- maintainerType: unknown
- parent: unknown
- firstRelease: 2007
- hqCountry: unknown

### Kind

- category: framework
- hosting: ruby
- language: ruby
- runtime: ruby
- runtimeMin: ruby 2.7
- basedOn: unknown

### Content

- contentStore: unknown
- databases: unknown
- adminUi: unknown
- headlessApi: unknown
- templating: erb, haml, builder, nokogiri, sass, scss, liquid, markdown, rdoc, asciidoc, markaby, rabl, slim, yajl
- i18n: unknown

### Rendering and deploy

- runsAs: always-on
- renderingModes: unknown
- installMethod: RubyGems, gem install

### License

- licenseModel: open-source
- license: MIT

### Releases

- currentMajor: 4
- latestReleaseDate: 2025-10-10

### Adoption

- githubStargazers: 12456
- packagistDownloads: not applicable
- npmWeeklyDownloads: not applicable
- contributors: 361
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: unknown
- dependentPackages: unknown

### Sources

- urls: https://sinatrarb.com/ (read 2026-10-26)
- urls: https://api.github.com/repos/sinatra/sinatra (read 2026-10-26)
- urls: https://sinatrarb.com/documentation.html (read 2026-10-26)
- maintainer: https://rubygems.org/api/v1/gems/sinatra.json (read 2026-10-26)
- language: https://api.github.com/repos/sinatra/sinatra (read 2026-10-26)
- category: https://sinatrarb.com/ (read 2026-10-26)
- runtime: https://github.com/sinatra/sinatra/blob/main/README.md (read 2026-10-26)
- runtimeMin: https://github.com/sinatra/sinatra/blob/main/README.md (read 2026-10-26)
- templating: https://github.com/sinatra/sinatra/blob/main/README.md (read 2026-10-26)
- installMethod: https://github.com/sinatra/sinatra/blob/main/README.md (read 2026-10-26)
- runsAs: https://github.com/sinatra/sinatra/blob/main/README.md (read 2026-10-26)
- license: https://api.github.com/repos/sinatra/sinatra (read 2026-10-26)
- licenseModel: https://raw.githubusercontent.com/sinatra/sinatra/main/LICENSE (read 2026-10-26)
- firstRelease: https://api.github.com/repos/sinatra/sinatra/git/refs/tags/0.0.1 (read 2026-10-26)
- currentMajor: https://api.github.com/repos/sinatra/sinatra/tags (read 2026-10-26)
- latestReleaseDate: https://rubygems.org/api/v1/gems/sinatra.json (read 2026-10-26)
- githubStargazers: https://api.github.com/repos/sinatra/sinatra (read 2026-10-26)
- contributors: https://api.github.com/repos/sinatra/sinatra/contributors (read 2026-10-26)

## Notes

Sinatra is a Ruby DSL for building web applications: routes are declared in blocks and the application runs as a Ruby program. It is installed as a gem next to a Rack server such as Puma, and its templates can be written in many engines, among them ERB, Haml, Slim, Liquid, Markdown and Builder. The MIT-licensed project is maintained by Blake Mizerany, Ryan Tomayko, Simon Rozet and Konstantin Haase.

## Worth knowing

The [README](https://github.com/sinatra/sinatra/blob/main/README.md) says code changes take effect only after the server restarts, so a Sinatra application is a running server process.

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Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0