Supabase vs Firebase: Which Backend Should You Build On?
Open Postgres versus Google's managed NoSQL, compared honestly.
Both Supabase and Firebase are solid backends-as-a-service that get you to a working app fast, with auth, storage and an API ready out of the box. The real difference sits underneath: Supabase is built on Postgres, a real relational SQL database you can take anywhere, while Firebase is Google's proprietary NoSQL store that is excellent at what it does but lives inside Google's ecosystem.
Here is how the two compare on the things that matter once an app grows past its first version, and why we reach for Supabase.
| Supabase | Firebase | |
|---|---|---|
| Database model | Postgres, real relational SQL | NoSQL document store |
| Querying | Full SQL, joins, views, transactions | Limited queries, denormalize to scale |
| Lock-in | Standard Postgres, portable anywhere | Proprietary, tied to Google |
| Realtime | Good, built on Postgres changes | Excellent, a core strength |
| Open source | Open source, self-hostable | Closed, fully managed only |
| Mobile and offline | Solid, web-first roots | Mature SDKs, strong offline support |
| Best for | Apps with real data relationships, built to own | Realtime and mobile prototypes on Google |
When Supabase makes sense
Choose Supabase when your data has real relationships, when you want the power of SQL and a database you can move off the platform if you ever need to, or when avoiding lock-in matters. Because it is plain Postgres, it scales further than people expect and stays portable, which is why it is the backend we reach for by default.
When Firebase is a good fit
Firebase shines for realtime-heavy apps, mobile-first products, and quick prototypes, especially if you already live in the Google ecosystem. Its realtime sync and offline support are genuinely excellent, and its mobile SDKs are mature. For a chat app or a fast mobile MVP, it is a strong pick.
Our honest take
Both are good, so the deciding question is your data. If it is realtime and mobile-first and you are happy on Google, Firebase is a fine choice. If you want real relational data, SQL, and a backend you actually own and can move, Supabase wins, and it is what we build on. Tell us what you are making and we will set the foundation up right.
Common questions
Will we get locked into Supabase the way we might with Firebase?
No, that is the point. Supabase is plain Postgres underneath, so your data and schema are standard and portable. You can self-host it or move to any Postgres provider, which is a freedom Firebase's proprietary store does not give you.
We have a Firebase app. Can you work on it or move it?
Yes to both. We are happy to extend a Firebase project, and when a move makes sense we migrate your data to Postgres and Supabase carefully, keeping your auth and workflows intact rather than forcing a rewrite.
Still weighing it up? Tell us your situation and we will show you the fastest path to a product you are proud of, and how we would build it.
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