Supabase vs Firebase: Choosing the Best Database for AI Projects in 2026

As we dive deeper into 2026, the landscape for building AI projects continues to evolve. One of the most critical decisions you'll face is choosing the right database. Supabase and Firebase are two popular options, each with unique strengths and weaknesses. If you're like many indie hackers and solo founders, you want to avoid the hype and make a decision based on practical experience. Let’s break down these two databases to see which one might be the best fit for your AI project.

Overview: What They Are

Supabase

Supabase is an open-source alternative to Firebase that provides a suite of backend services, including a PostgreSQL database, authentication, and real-time subscriptions. It's designed for developers looking for a robust SQL database with a familiar relational structure.

Firebase

Firebase, owned by Google, offers a NoSQL database, real-time data synchronization, and a host of other features tailored for mobile and web app development. Its Firestore database is particularly popular for applications needing real-time updates.

Feature Comparison

We built a simple AI-driven app using both databases to see how they stack up against each other. Here’s what we found:

| Feature | Supabase | Firebase | |------------------------|---------------------------------------|---------------------------------------| | Database Type | SQL (PostgreSQL) | NoSQL (Firestore) | | Real-time Capabilities | Yes | Yes | | Authentication | Built-in, supports social logins | Built-in, supports social logins | | Pricing | Free tier + starts at $25/mo | Free tier + starts at $24.99/mo | | Scalability | Works well until ~1000 users | Designed to scale beyond 1000 users | | AI Integration | Supports SQL queries for AI models | Good for real-time data handling |

Pricing Breakdown

When it comes to pricing, both platforms offer a free tier, but the costs can rise quickly as you scale.

Supabase Pricing:

• Free Tier: Limited to 500 MB storage, 2 concurrent connections.
• Pro Plan: Starts at $25/mo for 8 GB storage and 100 concurrent connections.
• Business Plan: Starts at $200/mo for 100 GB storage.

Firebase Pricing:

• Free Tier: Limited to 1 GB storage, 50,000 reads, 20,000 writes.
• Blaze Plan: Pay as you go, with costs around $24.99/mo for basic usage scaling up based on reads/writes.
• Fixed Plan: Starts at $50/mo for higher limits.

Best For Specific Use Cases

Supabase

• Best for: Developers who prefer SQL databases and need complex queries for AI applications.
• Limitations: Might not be the best choice for real-time applications where data changes frequently.

Firebase

• Best for: Mobile developers needing real-time data synchronization and easy integration with other Google services.
• Limitations: The NoSQL structure can make complex queries cumbersome.

Our Take: What We've Used

In our experience, we use Supabase for projects that require complex SQL queries and data integrity, especially when building AI models that rely on relational data. However, for mobile apps where real-time updates are paramount, Firebase has proven its worth.

What We Actually Use

For our recent AI project, we opted for Supabase due to its SQL capabilities and the ability to run complex queries directly against the database. Firebase was a close contender, especially for its ease of integration and real-time features, but we found the limitations in SQL querying to be a dealbreaker for our needs.

Conclusion: Start Here

If you're building an AI project in 2026 and need a database, start with Supabase if you require SQL and complex queries. Choose Firebase if your application needs real-time capabilities and you prefer a NoSQL setup.

Ultimately, your choice will depend on your specific use case, but understanding these trade-offs will help you make a more informed decision.