Firebase vs Supabase

Firebase and Supabase provide integrated Backend-as-a-Service environments where the monthly cost covers a bundled stack including a database, authentication services, object storage, and edge API runtimes. Firebase maintains a strict $0.00/mo pricing model, effectively acting as a fixed-resource sandbox that caps storage at 1 GB and egress at 10 GB. Supabase offers a broader spectrum, starting at $0.00/mo but scaling up to $7460.00/mo for enterprise-grade workloads. While Firebase keeps auth limits at 0.05 M users, Supabase allows for expansion up to 0.1 M users on higher tiers.

• Supabase offers more competitive overage rates, charging $0.13/GB for additional storage compared to Firebase’s $0.18/GB tax.
• Excess egress bandwidth on Supabase costs $0.09/GB, which undercuts the $0.12/GB fee found on the Firebase platform.
• Storage capacity on Supabase scales from 0.5 GB up to 8 GB within the base package, providing more flexibility than the static 1 GB limit on Firebase.
• Neither provider offers granular control over underlying hardware like AMD EPYC or ARM-based chips, as these are black-box abstractions designed to hide the complexity of Postgres and object storage management.

Firebase is built for developers who need a predictable, zero-cost entry point for small-scale applications and are willing to accept rigid resource ceilings. Supabase serves as a viable alternative for projects that expect to grow beyond basic constraints and prioritize lower per-gigabyte overage fees. The choice depends on whether the project requires the long-term scalability of the Postgres ecosystem or the simplicity of a fixed-cost environment. Teams should monitor egress patterns closely, as these are the most common triggers for unexpected billing spikes on both platforms.