Fizzy is a lightweight, open-source Kanban board from 37signals, free for up to 1,000 cards or $20/month unlimited, with self-hosting available.
Fizzy is a Kanban board application released by 37signals, the company founded by Jason Fried and David Heinemeier Hansson that also created Basecamp and HEY. Announced by Jason Fried as the company's newest product, Fizzy is designed to strip Kanban boards back to the essentials: cards, columns, and clear workflow tracking, without the sprawling feature set of tools like Jira, Asana, or Monday.com.
37signals has framed Fizzy as an open-source alternative to those larger project management platforms, releasing the source code publicly so it can be self-hosted on infrastructure like Railway, in addition to offering it as a hosted product directly from the company.
Fizzy focuses on a clean, minimal Kanban board experience: cards move through customizable columns representing workflow stages, with an interface designed around 37signals' well-known preference for simplicity over configuration sprawl. It supports unlimited team members even on the free tier, which is unusual among Kanban competitors that often gate user seats behind paid plans.
Because the software is open source, technically inclined teams can self-host Fizzy using common deployment tools, giving them full control over their data and infrastructure instead of relying on 37signals' hosted version. This dual hosted-or-self-hosted model mirrors 37signals' approach with other products like ONCE.
The hosted version of Fizzy is free for up to 1,000 cards with unlimited users, and unlimited cards cost $20 per month. According to 37signals, Fizzy's free and low-cost pricing is subsidized by the company's other paid products, Basecamp and HEY, rather than needing to be profitable on its own.
Because it is open source, there is also a no-cost path: teams uncomfortable paying for the hosted product, or who need to keep data on their own infrastructure, can self-host Fizzy for free using standard deployment platforms.
Yes, Fizzy is free for up to 1,000 cards with unlimited users; unlimited cards cost $20 per month on the hosted version.
Fizzy is made by 37signals, the company behind Basecamp and HEY, founded by Jason Fried and David Heinemeier Hansson.
Yes, Fizzy is open source, so teams can deploy and run their own instance instead of using the hosted version.
No, pricing is based on card volume, not the number of users; team size is unlimited even on the free tier.
Fizzy intentionally offers a smaller, simpler feature set focused on core Kanban tracking, rather than the extensive project management features found in larger competitors.