Cloud Cost Sense

Firebase vs Cloud Run

A practical guide to choosing Firebase or Cloud Run for early app backends, including cost behavior and operational tradeoffs.

Start with the product shape

Firebase is strongest when the app needs authentication, simple document data, push notifications, and quick iteration. Cloud Run is stronger when the app needs custom APIs, background jobs, webhooks, AI workflows, or stricter backend control.

Cost behavior

Firebase and Firestore can stay inexpensive at small scale, but list screens with many document reads can grow quickly. Cloud Run scales with requests, CPU, memory, and response time, so efficient API design matters.

Decision rule

Choose Firebase-first when speed and app convenience are the top priority. Choose Cloud Run when backend logic, integrations, or future migration control matter more than the fastest first launch.