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37 signals released the source code for their latest Rails SaaS called Fizzy. I did a source code read through video and wrote about it. I think I found 2 potential security issues along the way too. Enjoy! beautifulruby.com/code/fizzy

beautifulruby.com37 Signals Fizzy Kanban boardI walk through the source code of the latest Rails application open-sourced by 37 Signals

2/12/25, 9:48 pm0 reposts3 likes

BeautifulRuby.com

@beautifulruby.com

2 Dec 2025

Here’s the video if you want to skip the article. youtu.be/pDyF0l7JnNU?...

youtu.be37 Signals Fuzzy Kan-Ban board Rails App: Read The Friendly Source CodeYouTube video by BeautifulRuby․com