Firebase vs Supabase: Key Differences and When to Use Each

Both Firebase and Supabase are backend platforms that help developers build apps faster with databases and authentication. Firebase is a mature, Google-backed service with real-time syncing and many integrated tools, while Supabase is an open-source alternative built on PostgreSQL offering SQL querying and easier self-hosting.

Quick Comparison

Here is a quick side-by-side look at Firebase and Supabase on key factors.

Feature	Firebase	Supabase
Database Type	NoSQL (Firestore & Realtime DB)	SQL (PostgreSQL)
Real-time Sync	Built-in real-time listeners	Real-time with subscriptions
Authentication	Built-in with many providers	Built-in with many providers
Hosting	Static hosting & functions	Static hosting & edge functions
Open Source	No	Yes
Pricing Model	Pay as you go with free tier	Free tier + usage-based pricing

Key Differences

Firebase uses NoSQL databases like Firestore, which store data in documents and collections, making it flexible but less suited for complex queries. It excels in real-time data syncing with built-in listeners that update apps instantly when data changes.

Supabase uses PostgreSQL, a traditional SQL database, allowing developers to write familiar SQL queries and use relational data models. It supports real-time updates through PostgreSQL's replication features and subscriptions.

Firebase is a proprietary Google service with a large ecosystem including analytics, messaging, and machine learning tools. Supabase is open source, giving developers more control and the option to self-host. Firebase's pricing can grow with usage, while Supabase offers a transparent pricing model with a generous free tier.

Code Comparison

Here is how you add a user record to the database in Firebase using JavaScript.

javascript

import { initializeApp } from 'firebase/app';
import { getFirestore, collection, addDoc } from 'firebase/firestore';

const firebaseConfig = {
  apiKey: 'your-api-key',
  authDomain: 'your-app.firebaseapp.com',
  projectId: 'your-project-id'
};

const app = initializeApp(firebaseConfig);
const db = getFirestore(app);

async function addUser() {
  try {
    const docRef = await addDoc(collection(db, 'users'), {
      name: 'Alice',
      email: '[e-mail]'
    });
    console.log('User added with ID:', docRef.id);
  } catch (e) {
    console.error('Error adding user:', e);
  }
}

addUser();

Output

User added with ID: <generated-document-id>

Supabase Equivalent

Here is how you add a user record to the database in Supabase using JavaScript.

javascript

import { createClient } from '@supabase/supabase-js';

const supabaseUrl = 'https://your-project.supabase.co';
const supabaseKey = 'public-anonymous-key';
const supabase = createClient(supabaseUrl, supabaseKey);

async function addUser() {
  const { data, error } = await supabase
    .from('users')
    .insert([{ name: 'Alice', email: '[e-mail]' }]);

  if (error) {
    console.error('Error adding user:', error);
  } else {
    console.log('User added:', data);
  }
}

addUser();

Output

User added: [{ name: 'Alice', email: '[e-mail]', id: <generated-id> }]

When to Use Which

Choose Firebase when you want a fully managed, scalable backend with strong real-time capabilities and a rich ecosystem of integrated services, especially if you prefer NoSQL and serverless functions.

Choose Supabase if you want an open-source solution with SQL database power, easier complex querying, and the option to self-host or customize your backend. It is great for developers familiar with SQL and relational data.

Key Takeaways

Firebase offers a NoSQL, real-time backend with many integrated Google services.

Supabase provides an open-source SQL backend with real-time features and self-hosting options.

Firebase is best for apps needing serverless functions and a mature ecosystem.

Supabase suits projects requiring complex SQL queries and database control.

Both platforms support easy authentication and hosting for modern apps.