Supabase vs Firebase: Which Database Works Best for Your AI Project in 2026?

Navigating the landscape of databases for AI projects can feel overwhelming, especially with so many options. As a solo founder or indie hacker, you want a solution that’s not just feature-rich but also cost-effective and easy to implement. In 2026, Supabase and Firebase are two of the most popular choices, but they cater to different needs. So, which one should you choose for your AI project? Let’s break it down.

Understanding Supabase and Firebase

What is Supabase?

Supabase is an open-source alternative to Firebase that provides a suite of tools for building applications quickly. It offers a PostgreSQL database, real-time subscriptions, authentication, and storage.

What is Firebase?

Firebase, owned by Google, is a comprehensive app development platform that includes a NoSQL database, real-time data synchronization, authentication, and hosting. It’s especially popular for mobile and web applications.

Feature Comparison

| Feature | Supabase | Firebase | |-----------------------|----------------------------------|----------------------------------| | Database Type | PostgreSQL (SQL) | Firestore (NoSQL) | | Real-Time Capabilities | Yes (via subscriptions) | Yes (real-time updates) | | Authentication | Built-in with JWT | Integrated with Google Services | | Pricing | Free tier + $25/month pro | Free tier + $24.99/month pro | | Scalability | Good up to ~10,000 users | Excellent, scales automatically | | Open Source | Yes | No |

Pricing Breakdown

Supabase

• Free Tier: Limited to 500 MB of database space and 2 GB file storage.
• Pro Plan: $25/month, which includes 8 GB of database space and additional features like backups and monitoring.

Firebase

• Free Tier: Limited to 1 GB of storage and 50,000 reads, 20,000 writes per day.
• Blaze Plan: Pay as you go, with base costs around $24.99/month for small projects but can scale up quickly based on usage.

Best Use Cases

Supabase

• Best For: Developers looking for a SQL database with real-time capabilities.
• Limitations: Less mature than Firebase, fewer integrations available.

Firebase

• Best For: Projects needing seamless integration with Google services and flexible NoSQL data structures.
• Limitations: Costs can escalate quickly with usage; not ideal for complex queries.

Our Experience with Each

We’ve used both Supabase and Firebase in various projects. For our AI project focused on structured data and complex queries, Supabase worked out better due to its SQL capabilities. However, for a mobile app that required real-time updates without complex data structures, Firebase was the better fit.

Decision Framework: Choose Based on Your Needs

• Choose Supabase if:

  • You need SQL capabilities and complex querying.
  • You prefer open-source solutions.
  • Your project is likely to stay under 10,000 users.

• Choose Firebase if:

  • You’re building a mobile app that requires real-time updates.
  • You want easy integration with Google services.
  • You are prepared for potentially higher costs as you scale.

What We Actually Use

In our experience, we currently use Supabase for our AI projects because of its SQL capabilities and cost-effectiveness. We find it easier to handle datasets that require complex relationships and queries. However, we keep Firebase in our toolkit for projects that demand real-time data syncing and are more mobile-focused.

Conclusion: Start Here

If you’re just starting out on your AI project, I recommend giving Supabase a try, especially if you prefer SQL. It’s cost-effective and has a solid feature set for most indie projects. However, if your focus is on mobile and real-time data, Firebase can be a great choice, but keep an eye on your budget as you scale.