Code.

Tracking errors and exceptions that occur.

Feature requests.

A/B testing.

Tracking users. Messaging users.

Chatting to users for instant feedback. Support.

Sending emails. Sharing lists.

Track events and what users are doing.

Alerts when/if site goes down.

Metrics and insights.

Hosting and sharing code.

When I pushed Codeshare it was very much (and still is) MVP. UserVoice gave me a quick and free way to gather feedback from active users and helped prioritize feature requests.

Using Mixpanel to track events tells me what language users are switching to, what the most popular themes are and how often users are starting video chats. It also gives me a tool to experiment quickly with "fake" buttons and see if users click them. This enables me to validate the need for new features before fully building them out.

This was my first Node.js app. You could call it experimental. I also used Express.

Firebase made it really easy to do two things. 1) Store the shared code developers were sharing 2) Make it real-time simply by including some of their JS libraries. The reason I built CodeShare was to try out Firebase.

Heroku makes it easy to deploy in minutes and it's free for one dyno.

Instead of going back and forth integrating 3rd party scripts, Segment let me set up tracking once then I could switch all other tools on from their control panel. Made it easier to get Mixpanel, Intercom, Olark etc. up and running without touching code.

Hosting. Easy to deploy.