Supabase vs Firebase
Two popular backend-as-a-service platforms for web and mobile apps. Here's an honest comparison across database, auth, real-time, pricing, and lock-in.
Last updated: June 2026
The short answer
Choose Supabase if you want a relational Postgres database with SQL, open-source portability, and less vendor lock-in. Choose Firebase for a mature, fully managed platform with deep Google integration and strong mobile SDKs, especially for document-style data. Both offer auth, real-time, storage, and serverless functions.
Supabase vs Firebase at a glance
| Criterion | Supabase | Firebase |
|---|---|---|
| Best for | Apps that want SQL/Postgres and open-source portability | Mobile-first apps and rapid prototyping in the Google ecosystem |
| Database | PostgreSQL (relational, full SQL) | Firestore / Realtime DB (NoSQL document store) |
| Querying | Full SQL, joins, views, and Postgres extensions | Document queries; joins and complex queries are limited |
| Real-time | Real-time subscriptions on Postgres changes | Real-time is a core, mature strength |
| Auth | Built-in auth with row-level security policies | Mature auth with many providers and tight SDK integration |
| Functions | Edge Functions (Deno/TypeScript) | Cloud Functions (Node, Python, and more) |
| Open source & portability | Open-source; self-hostable on standard Postgres | Proprietary; data and logic are tied to Google Cloud |
| Pricing model | Predictable tiers; Postgres-based usage | Pay-as-you-go on reads, writes, and storage |
| Maturity & ecosystem | Younger, growing fast; standard SQL tooling works | Very mature, large ecosystem, deep Google integration |
When to choose Supabase
- You want a relational database and full SQL.
- Open-source and the option to self-host matter to you.
- You want to minimise vendor lock-in.
- Your data is relational with meaningful joins and constraints.
When to choose Firebase
- You're building mobile-first and want mature, polished SDKs.
- Your data fits a document model and needs heavy real-time sync.
- You're already invested in Google Cloud and its services.
- You want a battle-tested platform with a large ecosystem.
How we decide
We ship production apps on both. At SummationWorks we often reach for Supabase when an app benefits from relational data, SQL, and portability, and Firebase when a project is mobile-first or already in the Google ecosystem. We recommend based on your data model and product, not a default. See our web development services or tell us about your project.
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Frequently asked questions
Is Supabase better than Firebase?
Neither is universally better. Supabase gives you a relational Postgres database, full SQL, and open-source portability with less lock-in. Firebase is a more mature, fully managed platform with excellent mobile SDKs and real-time, especially for document-style data. The right choice depends on your data model and stack.
Is Supabase a true Firebase alternative?
Yes. Supabase offers the same core building blocks — database, authentication, real-time subscriptions, storage, and serverless functions — which is why it's positioned as an open-source Firebase alternative. The main difference is a relational Postgres database instead of a NoSQL document store.
Which is cheaper, Supabase or Firebase?
It depends on usage. Firebase's pay-as-you-go billing on reads, writes, and storage can grow unpredictably at scale, while Supabase's Postgres-based tiers tend to be more predictable. Model your real workload before deciding, as either can be cheaper for a given app.
Can I self-host Supabase or Firebase?
Supabase is open-source and can be self-hosted on standard PostgreSQL infrastructure. Firebase is proprietary and runs only on Google Cloud, so you cannot self-host it — that's a key consideration if avoiding vendor lock-in matters to you.
Which should I choose for a mobile app?
Firebase has long been a strong default for mobile thanks to its mature SDKs and real-time database, especially for document-style data. Supabase is fully capable for mobile too and is the better fit when you want relational data and SQL. Pick based on your data model.
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