Amplitude if you want to understand how a user interacts with your product. They do behavioral / product analytics. They also have a series of books written on

Amplitude if you want to understand how a user interacts with your product. They do behavioral / product analytics. They also have a series of books written on analytics and user behaviors, which you can find by searching for amplitude playbooks. They do offer a free tier and can ingest from different data sources if you want to provide your own. https://amplitude.com/ https://amplitude.com/ (Disclaimer: My wife works there, but my workplace also uses it to help determine UX issues in our product.)