Puma VS falcon

Compare Puma vs falcon and see what are their differences.


A Ruby/Rack web server built for parallelism (by puma)


A high-performance web server for Ruby, supporting HTTP/1, HTTP/2 and TLS. (by socketry)
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Puma falcon
40 8
7,600 2,509
0.3% 2.4%
8.7 8.5
7 days ago 6 days ago
Ruby Ruby
BSD 3-clause "New" or "Revised" License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of Puma. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-02-21.
  • Breaking the 300 barrier
    3 projects | dev.to | 21 Feb 2024
    As we use Puma as our webserver for our rails application, I quickly went to Puma's config file which typically resides in config/puma.rb. The config was set as
  • Would you consider Rails as stable nowadays ?
    2 projects | /r/rails | 8 Dec 2023
    They do! It's in the first section of the readme on the repo:
  • Hosting Rails App on AWS
    2 projects | /r/rails | 27 Jun 2023
    Start with service with systemd
  • Recommended way to implement Puma plugin configuration
    1 project | /r/ruby | 2 Jun 2023
  • Could not detect rake tasks
    6 projects | /r/rails | 3 May 2023
    # Use the Puma web server [https://github.com/puma/puma] gem "puma", "~> 5.0" # Build JSON APIs with ease [https://github.com/rails/jbuilder] # gem "jbuilder" gem 'rack-cors' gem "devise" gem "jsonapi-serializer" gem 'devise-jwt' gem 'active_model_serializers' gem 'followability' gem 'dotenv-rails', groups: [:development, :test, :production] gem 'sprockets' # Use Redis adapter to run Action Cable in production # gem "redis", "~> 4.0" # Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis] # gem "kredis" # Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword] # gem "bcrypt", "~> 3.1.7" # Windows does not include zoneinfo files, so bundle the tzinfo-data gem gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ] # Reduces boot times through caching; required in config/boot.rb gem "bootsnap", require: false # Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images] # gem "image_processing", "~> 1.2" # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible # gem "rack-cors" group :development, :test do # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem gem "debug", platforms: %i[ mri mingw x64_mingw ] end group :development do gem "sqlite3", "~> 1.4" # Speed up commands on slow machines / big apps [https://github.com/rails/spring] # gem "spring" end group :production do gem 'pg' end
  • Dusting off my rails knowledge, need some tips / guidance on rails 7 and production
    10 projects | /r/rails | 7 Apr 2023
    source "https://rubygems.org" git_source(:github) { |repo| "https://github.com/#{repo}.git" } ruby "3.1.0" # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main" gem "rails", "~> 7.0.4", ">=" # The original asset pipeline for Rails [https://github.com/rails/sprockets-rails] gem "sprockets-rails" # Use sqlite3 as the database for Active Record gem "sqlite3", "~> 1.4" # Use the Puma web server [https://github.com/puma/puma] gem "puma", "~> 5.0" # Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails] gem "importmap-rails" # Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev] gem "turbo-rails" # Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev] gem "stimulus-rails" # Build JSON APIs with ease [https://github.com/rails/jbuilder] gem "jbuilder" gem "mongoid" gem "mongoid-grid_fs" gem 'bootstrap', '~> 5.2.2' #sourced from https://github.com/twbs/bootstrap-rubygem gem 'rack-cors' # Windows does not include zoneinfo files, so bundle the tzinfo-data gem gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ] # Reduces boot times through caching; required in config/boot.rb gem "bootsnap", require: false
  • Write your own Domain Specific Language in Ruby
    2 projects | dev.to | 6 Feb 2023
    That doesn't mean one excludes the other. Gems like Puma use the instance_eval method for their configuration file.
  • Welcome to Puma 6: Sunflower
    1 project | /r/hypeurls | 22 Oct 2022
    1 project | news.ycombinator.com | 22 Oct 2022
  • puma 6.0 released
    2 projects | /r/ruby | 21 Oct 2022
    Anyway I did it: https://github.com/puma/puma/issues/3003 It's quite more complicated: https://github.com/puma/puma/issues/2999 A fix is in progress: https://github.com/puma/puma/pull/3002


Posts with mentions or reviews of falcon. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-10-12.
  • Pitchfork: Rack HTTP server for shared-nothing architecture
    8 projects | news.ycombinator.com | 12 Oct 2022
    Could you command on any projects within Shopify that are helping Ruby's concurrency story? I'm aware of Ractors (https://docs.ruby-lang.org/en/master/ractor_md.html) and Fibers, but it's unclear to how feasible these primitives currently are to build the necessary abstractions on top of them that would make Rails more concurrent.

    https://github.com/socketry/falcon is an interesting project, but again, it's not clear how difficult it would be deploying a Rails app on top of this.

    There's a lot of really great projects happening and plenty to be hopeful about, but when that stuff will land or the changes the rest of the community and ecosystem should think about making still isn't clear.

  • Java's Cultural Problem
    1 project | /r/programming | 19 Sep 2022
    HOWEVER HAD, not all of these problems (in Java) are due to some corporation going bulldozer-mode. Several problems seem to come primarily from bad technical decisions. The import-situation annoys me in Java. I think it is really bad that I can not easily require add-ons or files, without being forced into a specific, nonsensical directory structure. In ruby I just do require, or load (I could do require_relative but this is a pretty pointless addition; It even leads to bugs such as the author of https://github.com/socketry/falcon assuming that everyone uses a hardcoded filesystem, so code such as https://github.com/socketry/falcon/blob/main/bin/falcon at: require_relative '../lib/falcon/command' not working unless the assumption that the directory BELOW the bin/ one must contain a lib/ which is not always the case. I am not sure he understood the problem domain though. If he would have simply used require instead, that would not be an issue, but no, he thinks one has to use hardcoded path assumptions into require_relative, which means it'll break when you relocatethe bin/ executable file there. It's trivial to fix of course, just replace the require_relative with require, but I think he did not understand the explanation so ...)
  • Ho would you go on about creating async rest api in rails
    1 project | /r/rails | 21 Mar 2022
    This doesn't have much to do with Rails, more with the web server that serves the Rails app. Take a look at Falcon.
  • The time is right for Hotwire
    7 projects | /r/ruby | 8 Dec 2021
  • Using RequestStore with asynchronous I/O in Rails apps
    4 projects | dev.to | 22 Nov 2021
    You can use the Async gem and the Falcon web server to take advantage of this capability. And starting in Ruby 3.0, async I/O is even more automatic because inside the Ruby runtime, all socket operations will automatically yield the current fiber by default. It’s fully transparent to the developer. Your I/O calls appear to be blocking so they are easy to understand, consistent with Ruby’s “programmer happiness” philosophy.
  • Where is Ruby Headed in 2021?
    14 projects | news.ycombinator.com | 18 Nov 2021
    There seem to a lot of ruby pieces falling into place for Rails 7.

    The Achilles Heel of Hotwire apps has previously been the low number of supported websocket connections and high memory usage when using ActionCable and Puma but I have high hopes that Falcon[1] will take care of that.

    That along with Github's View Components[2] and Tailwind make me really please with the way Rails is heading right now.

    1. https://github.com/socketry/falcon

    2. https://github.com/github/view_component

  • Async Ruby
    3 projects | news.ycombinator.com | 30 Oct 2021
    This is all new to me as well, but the project mentioned the Falcon web server(https://github.com/socketry/falcon).

    The documentation for Falcon mentions using it with rails: https://socketry.github.io/falcon/guides/rails-integration/i...

    I imagine something more "native" to rails will happen eventually though. But would need to be after this makes its way into core ruby(which has not happened yet apparently).

  • Ask HN: Coming back to Web/Ruby/Rails since 2012. Help?
    1 project | news.ycombinator.com | 5 Mar 2021
    Welcome back.

    It's still the best choice in the Ruby world, well maintained, responsive and new features added. Shopify and github use it, you might want to look at the Rails 6 annoucements what these companies added for scalability features. There've been changes to the asset pipeline since version 3 but you'll still recognize it. You can run Rails as API-only and there's subprojects/tutorials for combining a frontend-heavy React,Vue with a Rails backend. You can still ignore the webpack based asset setup unless you use React,Vue I think. Ruby-3 works fine though I'm still waiting for some less-maintained gems to finally merge PRs, maybe you want to use Ruby-2.7 first.

    I use https://puma.io/ , that scales well enough for me. https://github.com/socketry/falcon#readme is faster with build-in HTTP/2 support but harder to setup in my opinion, e.g. requires SSL certificate even on localhost.

What are some alternatives?

When comparing Puma and falcon you can also consider the following projects:

Thin - A very fast & simple Ruby web server

Phusion Passenger - A fast and robust web server and application server for Ruby, Python and Node.js

Goliath - Goliath is a non-blocking Ruby web server framework

Iodine - iodine - HTTP / WebSockets Server for Ruby with Pub/Sub support

Roda - Routing Tree Web Toolkit

Unicorn - Unofficial Unicorn Mirror.

Rack - A modular Ruby web server interface.

AnyCable - AnyCable for Ruby applications