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Fizzy — a deliberately simple Kanban for issues and ideas

OSS scale score 245.9OSS health 93Update pace 77 commits/30d
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OSS scale score is an unbounded metric that log-compresses and weights Stars, Watchers, Forks, and Contributors. Discovery score is the current OSS scale score minus the score at discovery. Update pace is commits in the last 30 days, growth momentum is the OSS scale score difference within the recent observation window, and OSS health is a 0–100 rating based on available recency, Community Health, and release data.

Stars
8,212
Primary language
Ruby
License
Not determined
Repository last updated
Sep 19, 2026

Overview

Fizzy is a Kanban tool from 37signals for tracking issues and ideas. Built around Rails and Hotwire, it can be self-hosted through ONCE, Docker, or Kamal.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Organize issues and ideas as Kanban cards

The product emphasizes a simple flow of cards rather than accumulating a large set of project-management features.

Sources: [2][3]

Choose ONCE, Docker, or Kamal for self-hosting

ONCE targets simple single-machine deployment, Docker supports containerized operation, and Kamal is recommended for customized code deployments.

Sources: [2][4]

For teams that want simple shared work state instead of a highly configurable PM suite

It suits teams that want issues and ideas visible in Kanban without designing a complicated project-management process.

Sources: [2]

Review the O'Saasy License restriction on competing SaaS

The license permits broad use and modification but prohibits offering the software as a hosted, managed, or SaaS service that directly competes with the original licensor.

Sources: [2][5]

Official sources

  1. [1]basecamp/fizzy repository(2026-09-20)
  2. [2]Fizzy README(2026-09-20)
  3. [3]Fizzy website(2026-09-20)
  4. [4]Fizzy Docker deployment guide(2026-09-20)
  5. [5]Fizzy O'Saasy License(2026-09-20)
Supplemental curator note

Fizzy's source is available and broadly modifiable, but the O'Saasy License prohibits offering the software to third parties as a hosted, managed, or SaaS product that directly competes with the licensor. It should therefore be distinguished from standard open-source licenses.

Try it in 3 steps

  1. 1

    Get the source

    git clone --depth 1 https://github.com/basecamp/fizzy.git
  2. 2

    Enter the repository

    cd fizzy
  3. 3

    Check the official steps

    Continue with the commands in the README Installation, Quick Start, or Getting Started section.

    find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Check the official README

Growth

Growth trends · Last 30 days

8,212 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
77
Open PRs
61

Development activity is still being collected.

Built with

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Categories

Tags

GitHub data

GitHub dataView detailed GitHub data
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GitHub Topics

  • hotwire
  • kanban
  • rails
  • ruby
Stars
8,212
Forks
1,194
Watchers
35
Open issues
8
Contributors
102
Primary language
Ruby
License
Not determined
Repository last updated
Sep 19, 2026
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