Amplitude & Mixpanel are the main players for product analytics. Amplitude is a bit better for B2B products as you can potentially setup group properties for companies. Also their pricing is different: - Mixpanel charges per tracked users - Amplitude charges per tracked event So depending on your product one can be cheaper. I would also advice you to check out Smartlook. They are getting more and more product analytics features like event analytics and retention tables. Plus it also give you some qualitative data like user recording and heatmap

Amplitude is always indispensable.

For my early stage, using Google Analytics. I find it easy to use and straight forward and free. Is yours an app or website?

I have used Google Analytics and Mixpanel previously in my career. However the numbers are inflated especially when you are looking for Daily Active Visitors on your website since their concept of session time for each user is quite small. So, we started building a simple logging system and count DAU, WAU, MAU or Conversion rates using simple SQL queries. For visualizations, you can directly connect the database to tableau or simply use google sheets to see trends or drop off rates or retention rates.

Use this one https://appfigures.com/r/aaw3e

for UpStamps I am using Simple Analytics

For prospercircle.org, we use mixpanel and hotjar.

Google analytics, as far as we have application on Cloud Firestore