Supabase vs Firebase: Which Backend Fits Your App in India?

Supabase vs Firebase is the first backend decision many Indian developers make, often for a college project or a first startup MVP. Both give you a database, login, file storage and functions without running a server. They differ in one thing that decides almost everything else: the shape of your data. This guide compares them feature by feature, works through what the same app costs on each, and covers the risks that matter from India.

Pricing figures are from the official Firebase pricing page and Supabase’s pricing page, checked on 7 October 2026.

The short answer

• Choose Firebase if your app is mobile-first, must work offline, and its data is naturally a set of documents, such as chat messages or user profiles.
• Choose Supabase if your data is relational, such as users, orders and payments that point at each other, and you want SQL, reports and joins.
• Choose neither if you write your own backend and only need a database. That case is at the end.

SQL tables or JSON documents

Supabase is built on PostgreSQL. Your data lives in tables with foreign keys, and one query joins them:

SELECT u.name, o.total
FROM orders o
JOIN users u ON u.id = o.user_id
WHERE o.created_at > now() - interval '7 days';

Firebase’s main database, Firestore, stores JSON documents in collections and has no joins. To show the same list, you either read each order and then each user, or you copy the user’s name into every order document when you write it. Copying makes reads fast, but every copy must be updated when the name changes.

A practical test: if you can draw your data as boxes with arrows between them, you want SQL.

Feature by feature

Free plans compared

The biggest practical difference is the pause. A free Supabase project that sees too little activity for a week stops answering until someone resumes it. A free Firebase project keeps running. Every Supabase limit is listed in Supabase free tier limits.

What the same app costs on each

Take an app with 10,000 daily users, where each user causes about 30 database reads and 5 writes a day. That is about 300,000 reads and 50,000 writes daily.

On Firebase Blaze, the first 50,000 reads and 20,000 writes each day are free. The rest comes to about 7.5 million reads and 0.9 million writes a month. At the Firestore rates Google listed for its Mumbai location on 7 October 2026, $0.035 per 100,000 reads and $0.104 per 100,000 writes, that is roughly $3.50 a month for the database. Check the current per-location rates before relying on it.

On Supabase Pro, the same app costs $25 a month for the plan, with one Micro compute instance covered by the included credit, and no per-read charge. Our Supabase pricing breakdown shows how that grows with more projects and add-ons.

So for a small, read-light app, Firebase is often cheaper. The picture changes with scale and with mistakes: Firestore charges every read, so a screen that re-reads a large collection on every render, or a function stuck in a loop, multiplies the bill.

Billing risk

Supabase Pro has a spend cap, on by default, that restricts most usage overages instead of billing them. Compute and add-ons are always charged.

Firebase Blaze has no hard spending cap. Google’s own guide to avoiding surprise bills explains that budget alerts send notifications; they do not stop charges. Set alerts on day one, and add limits in your own code for anything that can loop.

Billing currency differs. Firebase runs on Google Cloud billing, and accounts with an Indian billing address are billed in rupees by Google Cloud India, with GST on the invoice. Supabase bills in US dollars, so an Indian card adds a forex markup, and a GST-registered business usually pays the GST itself under reverse charge.

Offline and mobile apps

Firebase was built for mobile. Its SDKs keep a local copy of the data, let the app work with no connection, and sync changes when the network returns. For apps used on patchy mobile networks, this is a real advantage.

Supabase’s realtime works well for web apps with a steady connection. Its offline support on mobile is not built in, so an offline-first app needs extra libraries and more of your own code.

Data in India

Both offer a Mumbai region. Firestore supports asia-south1 (Mumbai), and Supabase offers a Mumbai region. Choose it when you create the project, because moving later means migrating the data.

Region matters for speed as well as compliance. If your app server runs in one region and your database in another, every query crosses that distance.

Lock-in and leaving later

Leaving Supabase is easier for the data, because it is standard PostgreSQL that any Postgres host can import. The harder part is the auth, storage and security policies built around it.

Leaving Firebase is harder. Firestore has no standard export into another database, so moving to SQL means redesigning your data. Firebase Auth users can be exported with their password hashes, but your next auth system must support Firebase’s hashing to keep those passwords working. Our guide to Firebase alternatives walks through the move.

When you need neither

Many apps use their backend platform only as a database. They have their own Node.js, Django or FastAPI server that handles login and business logic, and talks to the database through an ORM.

For that app, a managed PostgreSQL database next to the server is simpler. Voroa’s managed PostgreSQL in Mumbai runs beside a service you deploy from GitHub, billed in rupees with a GST invoice, and the database is reached by your server rather than the browser. Read why teams move off Supabase for the trade-offs.

FAQ

Is Supabase better than Firebase for a college project?

If the project has relational data and you want to learn SQL, yes. A free Supabase project pauses after a week without activity, so open it before your demo or viva. Firebase’s free plan does not pause.

Can Firebase use PostgreSQL?

Firebase Data Connect connects Firebase apps to a Cloud SQL for PostgreSQL instance, which is billed separately as a Google Cloud resource. Firestore itself remains a document database.

Which is cheaper in India?

For a small, read-light app, Firebase often is, because you pay only for operations above the free quota. Supabase’s paid plan starts at $25 but does not charge per read, which is easier to predict as the app grows.

Which is better for a Flutter app?

For an offline-first Flutter app, Firebase, because of its mature offline sync. For a Flutter front end over relational data and a web dashboard, Supabase.

Run PostgreSQL next to your app with Voroa

If your choice comes down to SQL and your own backend, start with a free PostgreSQL database in Mumbai and connect it with one DATABASE_URL. The steps are in creating and connecting a database.