Monitoring your Firebase usage, cost projections, and getting budget alerts it key to not being caught off guard and getting that large bill. However, Firebase really is reasonably priced if you are wise about your network egress, storage, and reads/writes. Also the free tier is quite generous.

If you do want to monitor your Firebase costs check out my app that was built specifically to stop these surprise bills.

Co-Founder of — an API-first platform to automate your social media posts with a few lines of code.