Top 13 Ruby Concurrency Projects

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1. Concurrent Ruby

   1 17 5,829 6.2 Ruby

   Modern concurrency tools including agents, futures, promises, thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala, Go, Java, JavaScript, and classic concurrency patterns.

   

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. EventMachine

   2 3 4,283 8.7 Ruby

   EventMachine: fast, simple event-processing library for Ruby programs

   

4. JRuby

   3 28 3,911 9.9 Ruby

   JRuby, an implementation of Ruby on the JVM

   

   Project mention: Presentation Slides for RubyConf Austria 2026 Talk "Frontend Ruby on Rails with Glimmer DSL for Web" | dev.to | 2026-06-02

   Charles Nutter had me help him with his JRuby workshop afterwards by showcasing my other Glimmer project, Glimmer DSL for SWT, which runs on JRuby. In about 1 minute, I scaffolded a Hello World desktop app from scratch and then packaged it as a native executable on the Mac. Attendees were impressed. So, I’ve participated in presenting 2 events at this conference.

5. Celluloid

   4 2 3,873 0.0 Ruby

   Actor-based concurrent object framework for Ruby

   

6. Async Ruby

   5 25 2,451 8.5 Ruby

   An awesome asynchronous event-driven reactor for Ruby. (by socketry)

   

   Project mention: Telegem v3.4.0 is out – Bot API 9.6, Redis store, and looking back at 4.5 months of building | dev.to | 2026-05-06

   Full async architecture (built on Async, not threads)

7. render_async

   6 1 1,076 2.2 Ruby

   render_async lets you include pages asynchronously with AJAX

   

8. sidekiq-throttled

   7 2 798 5.2 Ruby

   Concurrency and rate-limit throttling for Sidekiq

   

9. kino

   8 1 168 6.7 Ruby

   A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front-end and Ractor-parallel Ruby workers and threaded fallback mode. (by yaroslav)

   

   Project mention: Kino, a high-performance Ractor web server for Ruby 4.0 | news.ycombinator.com | 2026-06-16

10. paralines

    9 2 46 0.0 Ruby

    Nice output to console/file from concurrent threads

    

11. concurrent_rails

    10 3 42 5.1 Ruby

    🕹 Small library to make concurrent-ruby and Rails play nice together

    

12. distributed-lock-google-cloud-storage-ruby

    11 3 18 0.0 Ruby

    Ruby implementation of a distributed lock based on Google Cloud Storage

    

13. Opal-Async

    12 0 9 3.3 Ruby

    Non-blocking tasks and enumerators for Opal.

    

14. ruby-fiber-showcase

    13 1 3 4.0 Ruby

    Ruby Fiber Showcase - HTTP Servers and Web Crawlers

    

Ruby Concurrency related posts

• Telegem v3.4.0 is out – Bot API 9.6, Redis store, and looking back at 4.5 months of building

  1 project | dev.to | 6 May 2026

• Async Ruby is the Future of AI Apps (And It's Already Here)

  2 projects | dev.to | 9 Jul 2025

• Building a Multi-Connection Redis Server with Ruby's Async Library [Part 1]

  1 project | dev.to | 26 Feb 2025

• Ruby, Rails, Multi-threading e Puma: Como tudo isso se conecta?

  2 projects | dev.to | 11 Feb 2025

• Rack for Ruby: Socket Hijacking

  1 project | dev.to | 4 Dec 2024

• Persistent Redis Connections in Sidekiq with Async::Redis: A Deep Dive.

  4 projects | dev.to | 18 Jul 2024

• Concurrent-ruby (async) S3 files download

  1 project | dev.to | 17 May 2024
• A note from our sponsor - SaaSHub
  www.saashub.com | 12 Jul 2026

  SaaSHub helps you find the best software and product alternatives Learn more →

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