What is Sure used for?

Sure is a self-hostable personal finance app, maintained by the community as a continuation of the abandoned Maybe Finance project. It is a good fit for tracking personal net worth privately and continuing with Maybe Finance after its shutdown.

Yes. Sure is open source under the AGPL-3.0 licence. Its source code is on GitHub at we-promise/sure and is written mainly in Ruby.

Yes. Sure is open source, so the software itself is free to use. Paid plans are also available, starting at $5 per month.

Can I self-host Sure?

Yes. Sure can be self-hosted on your own server or infrastructure.

What is Sure an alternative to?

Sure is an open-source alternative to Monarch, YNAB, Copilot Money and Quicken. Other open-source alternatives to Monarch include Actual Budget, Firefly III and Paisa.

Is Sure actively maintained?

Yes. The most recent commit to Sure was on 2 October 2026, and the latest release is v0.7.5-hotfix.1, published on 1 October 2026. The project has 10k stars on GitHub.

Sure: open-source alternative to Monarch, YNAB

About Sure

Sure is a personal finance application that can be self-hosted with Docker. It is a community-maintained fork of Maybe Finance, a project whose team built a full-featured personal finance and wealth management app and then stopped development after the business did not work out. Sure keeps that codebase alive.

The app can be accessed from a browser, a macOS desktop app, a mobile app, API clients and LLM agents, and the README points to an overview of Sure Clients. It is a fully working finance app for tracking money, and the maintainers invite contributors to join through Discord, GitHub issues and the project website. The README is translated into several languages.

Sure is written in Ruby and released under the AGPL-3.0 license. Anyone may fork it under that license, but forks are asked to include the original license and state that they are based on Maybe Finance and not affiliated with it, to stay compliant and avoid trademark problems.

Key features

Personal finance tracking
Self-hosting with Docker
Browser, macOS and mobile access
API access for clients and LLM agents
Community fork of Maybe Finance

Good fit for

→Tracking personal net worth privately
→Continuing with Maybe Finance after its shutdown

Built with: Ruby
Tags: personal-finance; budgeting; self-hosted; maybe-finance; ruby; docker; net-worth

Sure: questions and answers

What is Sure used for?: Sure is a self-hostable personal finance app, maintained by the community as a continuation of the abandoned Maybe Finance project. It is a good fit for tracking personal net worth privately and continuing with Maybe Finance after its shutdown.
Is Sure open source?: Yes. Sure is open source under the AGPL-3.0 licence. Its source code is on GitHub at we-promise/sure and is written mainly in Ruby.
Is Sure free?: Yes. Sure is open source, so the software itself is free to use. Paid plans are also available, starting at $5 per month.
Can I self-host Sure?: Yes. Sure can be self-hosted on your own server or infrastructure.
What is Sure an alternative to?: Sure is an open-source alternative to Monarch, YNAB, Copilot Money and Quicken. Other open-source alternatives to Monarch include Actual Budget, Firefly III and Paisa.
Is Sure actively maintained?: Yes. The most recent commit to Sure was on 2 October 2026, and the latest release is v0.7.5-hotfix.1, published on 1 October 2026. The project has 10k stars on GitHub.