Supabase vs Firebase: Which Backend is Right for Your Next App?

# Entry

Choosing a backend is one of the most essential decisions you will make when building a up-to-date web or mobile application. Over the years Firebase is a great choice for developers who want to run software quickly without having to manage servers. But recently Supabase has become a powerful open source alternative.

If you are a developer familiar with APIs and databases and create, read, update, and delete (CRUD) operations, this article will provide a clear, neutral comparison of these two leading backend as a service (BaaS) platforms. At the end, you’ll know which one is right for your next project.

# Firebase at a glance

Firebase is an end-to-end application development platform launched in 2011 and acquired by Google in 2014. Provides a set of tools, including: Firestore Cloud – database beyond SQL (NoSQL) – authentication, serverless capabilities and cloud storage.

Firebase is well known for real-time synchronization; when data changes, it is instantly updated on all connected clients, whether they are web, iOS or Android applications. This makes it ideal for chat applications, live collaboration tools, and real-time dashboards.

# Supabase at a glance

Supabase is an open source Firebase alternative that launched in 2020. Instead of a NoSQL database, it relies on PostgreSQLone of the most advanced and trusted relational databases in the world.

Supabase provides a real-time engine, authentication, storage, and edge capabilities while also allowing you to work with tables, rows, and structured query language (SQL). It is a favorite among developers who love SQL but don’t want to manage database infrastructure. Since it’s open source, you can even self-host it if you need to.

# Comparison of basic functions

To decide which backend is right for you, let’s look at the key pillars of any BaaS platform.

1. Database: SQL vs NoSQL. This is the biggest difference between them.
   • Firebase (Cloud Firestore) uses a document-oriented NoSQL model. Data is stored in sets of documents and there is no set pattern. This provides a lot of flexibility for quick iteration, but if you’re not careful it can lead to sophisticated queries and data duplication. Firestore is optimized for massive and real-time updates.
   • Supabase (PostgreSQL) uses a relational SQL database. You define tables, columns, and relationships – such as foreign keys. This structure ensures data integrity and is ideal for sophisticated data relationships, including e-commerce orders, user profiles, and inventory. PostgreSQL is a mature, feature-rich database with support for views, functions, and triggers.

   Verdict: If you like spreadsheets and structured relationships, choose Supabase. If you prefer JSON documents and want to get things done quickly without designing a schema, choose Firebase.

2. Real-time opportunities. Both platforms offer real-time functionality, but they work differently.
   • Firebase: Real-time functionality is built into the core. Every customer listening to a document or collection receives instant updates. It runs smoothly and requires minimal configuration.
   • Supabase: Added real-time feature uses PostgreSQL replication. You enable replication on specific tables, and Supabase broadcasts changes to connected clients. It’s powerful, but requires a bit more setup.

   Verdict: Firebase has a slight advantage in ease of real-time configuration, but the Supabase approach gives you the full power of PostgreSQL under the hood.

3. Authentication. Both provide reliable authentication via email/password, social logins (Google, GitHub), and magic links.
   • Firebase Auth is mature and deeply integrated with Google Cloud services. It is effortless to configure and manage.
   • Supabase Auth is built directly on top of PostgreSQL. User data can be found in auth.users table, which makes connecting user profiles to other tables in the database straightforward – a huge advantage for relational data modeling.

   Verdict: Both are excellent. Supabase’s tight integration with PostgreSQL is a win if you’re already using SQL.

4. Pricing model.
   • Firebase: Offers a generous free tier (“Spark” plan). However, as your application scales, costs can become unpredictable, especially if you have a gigantic number of reads/writes. Since it is privately owned, you are circumscribed by Google Cloud pricing.
   • Supabase: also has a very generous free tier. Since it’s open source, you have options: stay hosted in the cloud or self-host on your own infrastructure – e.g. Amazon Web Services (AWS) Relational Database Service (RDS) — control costs.

   Verdict: Supabase offers greater cost flexibility and transparency, especially for large-scale applications.

5. Ecosystem and supplier dependence.
   • Firebase: You’re buying the Google ecosystem. Moving from Firestore to another database requires a major rewrite of the application logic.
   • Supabase: Because it’s built on PostgreSQL, you’re never really locked in. You can export your data and migrate to any other PostgreSQL provider – such as AWS or Google Cloud SQL – without changing your application’s data structure.

   Verdict: Supabase wins in terms of long-term flexibility and open source freedom.

# Choosing between Firebase and Supabase

Choose Firebase if:

• You’re building a real-time collaboration application where instant synchronization is crucial
• You already employ Google Cloud services or want tight integration with them
• You prefer a NoSQL, schema-less approach and want to iterate quickly
• You want a huge community with tons of tutorials and third-party integrations

When to choose Firebase | Photo by the author

Choose Supabase if:

• You need sophisticated relational data – such as financial applications or inventory systems
• You love SQL and want the full power of PostgreSQL – including views, functions, and triggers
• You are concerned about vendor lock-in and prefer open source software that you can host yourself
• You want row-level security (RLS) directly in the database, which Supabase elegantly handles with PostgreSQL policies

When to choose Supabase | Photo by the author

# Summary

Neither Firebase nor Supabase are objectively “better”. The right choice depends on the application requirements and your comfort zone.

• Choose Firebase if you want the fastest path to a real-time minimum viable product (MVP) and are novel to NoSQL data modeling.
• Choose Supabase if you have experience in SQL, build applications with sophisticated data relationships, or value the freedom of open source software.

Both platforms allow you to skip server management and make the application available to users faster. The best way to decide? Try a straightforward prototype on both and see which workflow feels more natural.

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Shittu Olumid is a software engineer and technical writer with a passion for using cutting-edge technology to create compelling narratives, with an eye for detail and a knack for simplifying sophisticated concepts. You can also find Shittu on Twitter.