Supabase vs Firebase: The Ultimate AI Coding Tool Battle (2026)

As indie hackers and solo founders, we often find ourselves at a crossroads when it comes to choosing the right backend solution for our projects. Do we go with Firebase, the established giant, or switch to Supabase, the rising star? Both platforms offer powerful tools for building applications, but the differences can make or break your project.

In this post, I'll break down the key features, pricing, and our honest experiences with both tools to help you make an informed decision.

Feature Comparison: Database, Authentication, and Storage

Database Capabilities

| Feature | Supabase | Firebase | |---------------|------------------------------------|-------------------------------------| | Type | SQL (PostgreSQL) | NoSQL (Firestore) | | Real-time | Yes | Yes | | Querying | SQL queries | JSON-based queries | | Scalability | Works well for structured data | Great for unstructured data | | Pricing | Free tier + $25/mo for pro | Free tier + $24/mo Blaze plan |

Our Take: We prefer Supabase for structured projects due to its SQL capabilities, which allow for complex queries. Firebase's NoSQL structure can be limiting for certain use cases.

Authentication

| Feature | Supabase | Firebase | |---------------|------------------------------------|-------------------------------------| | Social Login | Yes | Yes | | Email/Password| Yes | Yes | | Multi-Factor | Yes | Yes | | Custom Auth | Limited | Very flexible |

Our Take: Firebase wins here if you need a highly customizable authentication system. Supabase's offerings are solid but less flexible.

Storage Solutions

| Feature | Supabase | Firebase | |---------------|------------------------------------|-------------------------------------| | File Storage | Yes (with PostgreSQL integration) | Yes (Cloud Storage) | | Pricing | $0 for 1GB, $0.01 per additional GB| Free tier + $0.026/GB after |

Our Take: Firebase's storage is more mature, but for most indie projects, Supabase's offering is sufficient.

Pricing Breakdown

Both platforms offer free tiers, which is essential for indie builders. However, as your project grows, costs can add up.

| Tool | Free Tier | Paid Plans | |--------------|---------------------------------|-------------------------------------| | Supabase | Up to 500MB storage | $25/mo for 2GB storage | | Firebase | Up to 1GB storage | $24/mo for Blaze plan |

Limitations: Supabase's free tier is limited in terms of storage and API requests, while Firebase's costs can escalate quickly with high usage.

Performance and Scalability

Speed

Both tools offer real-time capabilities, but performance may vary based on your data structure and usage patterns.

Our Experience: In our tests, Supabase performed better for applications with structured data, while Firebase excelled in handling large amounts of unstructured data.

Scalability

Both platforms can handle a significant number of users, but we found Firebase to be more resilient under heavy loads due to its mature infrastructure.

Choose Supabase If...

• You prefer SQL databases for structured data.
• You want a straightforward pricing model.
• Your application requires real-time features without complex data structures.

Choose Firebase If...

• You need advanced authentication options.
• You’re building an application that relies heavily on unstructured data.
• You can handle potentially higher costs as your app scales.

What We Actually Use

In our experience at Built This Week, we lean towards Supabase for most of our projects due to its SQL capabilities and straightforward pricing. However, we've used Firebase for specific features like authentication and storage when needed.

Conclusion

Ultimately, the choice between Supabase and Firebase depends on your specific use case and project requirements. If you're building something that requires structured data and straightforward pricing, start with Supabase. If you need advanced authentication and can handle the potential costs, Firebase might be the way to go.