Rails: open-source web framework, written in Ruby

Judgement

What it is: Framework or platform
What it does: Ruby on Rails, a full-stack web framework with ActiveRecord, background jobs, mailers, Hotwire front end and conventions for most web app needs.
Adopt it when: A small team wants to build and ship a web product quickly with one cohesive framework.
Watch out: Ruby developers are harder to hire in some markets.
Ready for: Production-ready
Runs as: Library
Built with: Ruby
How established: Established: started 18 years ago, latest release v8.1.4.
What the license allows: You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Ruby V8 Redis Postgres

Follow it down: Rails → Ruby → GCC → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

Built on Rails: 22 projects

1
Huginn huginn
Create agents that monitor and act on your behalf. Your agents are standing by!

Complete system Production-ready You want IFTTT-style monitoring and automations on your own server and are comfortable with Rails.
★ 50k MIT Ruby Active, pushed today
2
Devise heartcombo
Flexible authentication solution for Rails with Warden.

Building block Production-ready You are building a Rails app with conventional email and password accounts.
★ 24k MIT Ruby Active, pushed 27 days ago
3
DocuSeal docusealco
Open source DocuSign alternative. Create, fill, and sign digital documents ✍️

Complete system Production-ready You want DocuSign-style e-signatures without per-envelope fees and can run a Docker container.
★ 19k AGPL-3.0 Ruby Active, pushed today
4
Postal postalserver
📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

Complete system Production-ready You send large volumes of transactional email and want your own Sendgrid-style platform on your own IPs.
★ 17k MIT Ruby Active, pushed 4 days ago
5
OpenProject opf
OpenProject is the leading open source project management software for product, project and portfolio management. A powerful Jira alternative with agile planning, issue tracking, roadmaps, Gantt charts, time tracking, collaboration features, and more. Available on premises or in the cloud. ⭐ Star us on GitHub

Complete system Production-ready An organisation, especially in the public sector or EU, needs classic project management with data sovereignty.
★ 17k GPL-3.0 Ruby Active, pushed 5 days ago
6
Zammad zammad
Zammad is a web based open source helpdesk/customer support system.

Complete system Production-ready A support team wants a mature, self-hostable alternative to Zendesk or Freshdesk.
★ 6k AGPL-3.0 Ruby Active, pushed 7 days ago
7
Doorkeeper doorkeeper-gem
Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape.

Building block Production-ready Your Rails app needs to offer an OAuth API to third-party or mobile clients.
★ 5.5k MIT Ruby Active, pushed today
8
Solidus solidusio
🛒 Solidus, the open-source eCommerce framework for industry trailblazers.

Framework or platform Production-ready A Rails team runs a high-volume store and wants a stable, community-run commerce engine.
★ 5.3k BSD-3-Clause Ruby Active, pushed 6 days ago
9
Blazer ankane
Business intelligence made simple

Integration Production-ready Your product is a Rails app and you want internal SQL reporting with no extra service.
★ 4.8k MIT Ruby Active, pushed 14 days ago
10
Errbit errbit
The open source error catcher that's Airbrake API compliant :ukraine:

Complete system Usable You want free self-hosted error tracking for apps that already use Airbrake clients.
★ 4.3k MIT Ruby Active, pushed today
11
Stringer stringer-rss
A self-hosted, anti-social RSS reader.

Complete system Usable You want a plain personal feed reader and are comfortable deploying a Rails app with Postgres.
★ 4.1k MIT Ruby Active, pushed yesterday
12
Flipper flippercloud
🐬 Beautiful, performant feature flags for Ruby.

Building block Production-ready You run a Ruby or Rails app and want feature flags stored in your own database.
★ 4k MIT Ruby Active, pushed today
13
PasswordPusher pglombardo
🔐 Securely share sensitive information with automatic expiration & deletion after a set number of views or duration. Track who, what and when with full audit logs.

Complete system Production-ready Your team keeps pasting credentials into email or chat and you want a self-destructing link with an audit trail instead.
★ 3.2k Apache-2.0 Ruby Active, pushed today
14
AlchemyCMS AlchemyCMS
Alchemy is the Open Source Rails CMS framework for the component based web that can be used as classic server side rendered or headless CMS.

Framework or platform Production-ready Your site or product is built on Rails and editors need structured, component-based page editing inside it.
★ 905 BSD-3-Clause Ruby Active, pushed today
15
Fae wearefine
CMS for Rails. For Reals.

Framework or platform Usable A Rails team wants generated admin models and views that they will customise heavily.
★ 852 MIT Ruby Active, pushed 2 days ago
16
Cenit cenit-io
:rocket: Cenit IO - 100% open source integration Platform (iPaaS)

Complete system Usable You want a self-hosted integration platform and have Ruby, MongoDB and RabbitMQ skills.
★ 509 MIT Ruby Active, pushed 3 days ago
17
Ekylibre ekylibre
Open source Farm management Information System (FMIS) - Connecting farms to the world

Complete system Usable A French or European farm or agricultural cooperative wants open-source farm records with mapping and accounting.
★ 493 AGPL-3.0 Ruby Active, pushed 8 days ago
18
Motor Admin Rails motor-admin
Low-code Admin panel and Business intelligence Rails engine. No DSL - configurable from the UI. Rails Admin, Active Admin, Blazer modern alternative.

Building block Usable You need back-office CRUD and reports in a Rails app quickly.
★ 839 MIT Ruby Slowing, pushed 9 months ago
19
Miru-web saeloun
Miru | Time Tracking and Invoicing and Employee Benefits. Built using Ruby On Rails and ReactJS

Complete system Usable A services firm wants to replace separate timer, invoicing and expense tools with one self-hosted app.
★ 268 MIT TypeScript Active, pushed 2 days ago
20
EveryDocs Core jonashellmann
A simple Document Management System for private use with basic functionality to organize your documents digitally

Complete system Usable You want a very basic personal document store and prefer Rails.
★ 421 GPL-3.0 Ruby Slowing, pushed 3 months ago

Open-source alternatives to Rails

1
React react
The library for web and native user interfaces.

Framework or platform Production-ready You build interactive front ends and want the largest ecosystem and hiring pool.
★ 252k MIT JavaScript Active, pushed 2 days ago
2
Flutter flutter
Flutter makes it easy and fast to build beautiful apps for mobile and beyond

Framework or platform Production-ready You want one team to ship polished apps on mobile and desktop from a shared codebase.
★ 181k BSD-3-Clause Dart Active, pushed today
3
FastAPI fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production

Framework or platform Production-ready You build JSON APIs or ML services in Python and want typed, async code with free docs.
★ 104k MIT Python Active, pushed today
4
Angular angular
Deliver web apps with confidence 🚀

Framework or platform Production-ready You build large enterprise web apps and want a complete, opinionated framework with long-term support.
★ 101k MIT TypeScript Active, pushed today
5
Django django
The Web framework for perfectionists with deadlines.

Framework or platform Production-ready You are building a data-driven web app in Python and want batteries included.
★ 91k BSD-3-Clause Python Active, pushed today
6
Svelte sveltejs
web development for the rest of us

Framework or platform Production-ready You want small bundles and simple component code for a new front end.
★ 89k MIT JavaScript Active, pushed today
7
Flask pallets
The Python micro framework for building web applications.

Framework or platform Production-ready You want a minimal Python web framework where you choose your own database and components.
★ 75k BSD-3-Clause Python Active, pushed 3 days ago
8
Express expressjs
Fast, unopinionated, minimalist web framework for node.

Framework or platform Production-ready You want the most widely known, unopinionated Node.js server framework.
★ 70k MIT JavaScript Active, pushed today