-
Plausible Analytics
Simple, open source, lightweight (< 1 KB) and privacy-friendly web analytics alternative to Google Analytics.
-
SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
I think a single Google Analytics alternative is pretty hard to pick considering that GA can be used to very much varying extents.
For simple and "detailed enough" insights, I enjoyed using Plausible (https://plausible.io/) in the past.
For more in depth analytics that give you a detailed view into your own product, PostHog.com seems to be by far the best and most popular option out there.
Another open source alternative similar to Plausible is https://umami.is/