Hey IH š
I'm happy to show you my side project, Fugu.
Fugu is a product analytics software that focuses on privacy and simplicity. Oh, and itās open source, too!
How it works
At its core, Fugu allows you to track events along with properties by calling the Fugu API. You can then analyze your events by looking at different time ranges, time aggregations, property breakdowns and creating conversion funnels.
Here's a screenshot from the event overview:

Hereās an example request body of an API call you might make to track an event:
{
"api_key": "very_secret",
"name": "Fun event",
"properties": {
"color": "Blue",
"type": "Oak"
}
}
Fugu doesnāt track unique users, not even anonymously. I believe that you can get enough insights without doing that, and that the incremental insights you get by tracking unique users is not worth the privacy trade-off. You can read more about my thinking in this post linked in the footnotes.
Pricing
You can host the open-source version yourself for free, forever, without any feature restrictions. Additionally, I offer a managed cloud version and charge $9/month for it. You can try the cloud version for free - you donāt need to pay as long as you only track events in test mode (itās meant for testing, and those events are deleted after 14 days).
Tech
Fugu is a Ruby on Rails monolith. I use Postgres for the database and Stimulus for the little JavaScript I need. For the charts, I use the awesome Chart.js library. It's hosted with DigitalOcean in their Frankfurt, Germany data center.
I currently have have two paying customers (revenue $18/month), 56 stars and 4 forks on GitHub. I'm unsure how many self-hosters there are, but I'm hoping a few.
I'm looking forward to any questions or feedback you might have. Also, feel free star Fugu on GitHub āļø
Futher links:
Looks good!
Thanks!