Getting Started with Supabase: A Complete Guide to the Open-Source Firebase Alternative

Reviewed and verified by FeiYueh · Last verified 2026-05-23

Supabase is an open-source Backend-as-a-Service platform built on PostgreSQL. "In April 2024, it completed an $80 million Series D funding round at a $2 billion

Supabase is an open-source Backend-as-a-Service platform built on PostgreSQL. "In April 2024, it completed an $80 million Series D funding round at a $2 billion valuation" (Source: Supabase Official Blog) . It provides real-time database, authentication, storage, and edge functions on par with Firebase, while preserving full SQL control and data portability. For developers who need relational data models, complex queries, or want to avoid Google Cloud lock-in, Supabase is the most pragmatic choice in 2026. Core Differences Between Supabase and Firebase The most critical difference lies in the data model: Supabase uses a PostgreSQL relational database, while Firebase Firestore uses a NoSQL document database. This determines that the two are suited for entirely different use cases. PostgreSQL is "the most loved database in the 2024 Stack Overflow Developer Survey, with a 49% usage rate, surpassing MySQL for the second consecutive year" (Source: Stack Overflow Developer Survey 2024) . Supabase is built directly on top of it, meaning any SQL knowledge, ORM tools, or data analysis skills can transfer seamlessly. Firebase, on the other hand, requires learning its proprietary query API and does not support JOINs or complex aggregation queries. Another key difference is open source and licensing. Supabase uses the Apache 2.0 license and can be fully self-hosted on any cloud or on-premises server. Firebase is Google's proprietary service, with extremely high migration costs. Feature Comparison Database : Supabase = PostgreSQL (relational, SQL); Firebase = Firestore (NoSQL, document-based) Real-time subscriptions : Both support it; Supabase implements it via PostgreSQL logical replication Authentication : Supabase Auth (GoTrue) supports OAuth, Magic Link, SAML, MFA; Firebase Auth has similar features File storage : Supabase Storage is based on S3-compatible protocol; Firebase Storage is tied to Google Cloud Storage Function compute : Supabase Edge Functions are based on Deno;

Reviewed and verified by FeiYueh · Last verified 2026-05-23. Independently maintained — not AI-generated boilerplate.