A session is a period of activity from a single user in your app or website. It can include many pageviews or events. For web, a session ends after 30 minutes of inactivity from the user. For iOS, a session ends after your app has entered the background.
Also, 4 server-side events are priced the same as a single session. Server-side events are counted differently because they aren't associated with any sessions.
Don't worry - we will not drop or throttle your data!
Once you exceed your plan's monthly limit, you'll receive an email asking you to upgrade to the appropriate tier. You'll need to do this before you can view your data again.
You can get 50,000 sessions per month for free! Just add the Heap badge to your website to unlock the Startup plan (value of $249/month) at zero extra cost.