I’m guessing because this one is open. There are very few self hosted budgeting tools, and a lot of desktop ones. If I’m going through the trouble of self hosting one, it better be open source. I don’t want to get stuck with all my financial data in an app I don’t want to pay anymore or worse, goes out of business.

If the open self hosted app doesn’t suit me, there’s GnuCash. A bit of a learning curve and less sexy, but it’s solid and got my finances stable through college.