| Firebase | Google Cloud | |
|---|---|---|
| Maintainer | ||
| First release | 2011 | 2008 |
| License | proprietary | proprietary |
| Learning curve | The easiest backend on this list, sDK-first, no servers to manage, and an app can be talking to a database within an hour. | The gentlest console and cleanest project model of the big three; there are simply fewer services to learn. |
| Performance | Serverless infrastructure on Google Cloud with realtime data sync built-in; performance is excellent until query patterns outgrow Firestore's model. | Excellent global network and best-in-class data and AI services; third in market share behind AWS and Azure. |
Firebase is Google Cloud's app-developer layer. The same infrastructure wrapped in SDKs that remove all operations. Start on Firebase for mobile and small web products; reach into Google Cloud (Cloud Run, Cloud SQL, BigQuery) as the backend grows, since both share projects, billing and IAM, making the graduation unusually smooth.