Supabase vs Firebase — Which Backend-as-a-Service in 2026?

Last updated: April 6, 2026 · 8 min read

TL;DR Verdict

Pick Supabase if you want an open-source, PostgreSQL-based backend you can self-host, with SQL power, row-level security, and zero vendor lock-in. It's the top choice for indie hackers, startups, and teams that value data ownership.

Pick Firebase if you need a battle-tested Google ecosystem with best-in-class mobile SDKs, Crashlytics, ML Kit, and you're fine with a proprietary NoSQL model. It's still unmatched for rapid mobile prototyping and Google Cloud integration.

Both are excellent. Your choice depends on database philosophy (SQL vs NoSQL), open-source preference, and target platform.

Side-by-Side Feature Comparison

Feature	Supabase	Firebase
Database Type	PostgreSQL (relational)	Firestore (NoSQL document) + Realtime DB
SQL Support	Full SQL — joins, views, stored procedures, extensions	No SQL. Query via SDK filters only
Auth	Email, OAuth, magic link, phone, SAML. Row-level security (RLS) built-in	Email, OAuth, phone, anonymous, multi-factor. Firebase Auth + Identity Platform
Realtime	Postgres changes via websockets (listen to row inserts/updates/deletes)	Native realtime sync (Firestore & Realtime DB). Offline-first with local caching
Storage	S3-compatible object storage with RLS policies	Cloud Storage for Firebase (backed by GCS). Security rules
Functions	Edge Functions (Deno runtime, globally distributed)	Cloud Functions (Node.js, Python). 2nd gen on Cloud Run
Pricing Model	Usage-based. Free tier → Pro $25/mo → Team $599/mo	Usage-based (pay-as-you-go). Spark free → Blaze (pay per use)
Open Source	Yes — Apache 2.0. Fully open	No. SDKs are open source; backend is proprietary
Self-Hostable	Yes — Docker Compose, Kubernetes, any cloud	No (Firebase Emulator for local dev only)
Vendor Lock-in Risk	Low — standard Postgres. Migrate data with pg_dump	High — Firestore data model is proprietary. Deep Google coupling
Community / Ecosystem	Fast-growing. 75K+ GitHub stars. Strong indie/startup community	Massive. 10+ years. Huge plugin ecosystem, tutorials, StackOverflow answers
Extra Services	Vector embeddings (pgvector), cron jobs, database branching	Crashlytics, Analytics, ML Kit, Remote Config, A/B Testing, App Check
Best For	Web apps, SaaS, startups, AI/vector workloads, data ownership	Mobile apps, rapid prototyping, Google ecosystem, analytics-heavy apps

Pricing Comparison (2026)

Tier	Supabase	Firebase
Free	500 MB database 1 GB storage 50K monthly active auth users 500K edge function invocations 2 projects	1 GB Firestore storage 5 GB Cloud Storage 10K auth verifications/month 125K Cloud Function invocations 10 GB hosting transfer
Pro / Pay-as-you-go	$25/mo per project 8 GB database 100 GB storage 100K MAU auth 2M edge function invocations Daily backups (7 day retention)	Blaze — pay per use $0.108/GB Firestore storage $0.026/GB Cloud Storage $0.01/10K Firestore reads $0.40/M Cloud Function invocations No fixed monthly fee
Scale / Enterprise	Team: $599/mo SOC2, SSO/SAML Priority support Database branching 28 day backup retention Enterprise: custom pricing	Enterprise (custom) Committed use discounts Premium support SLAs Advanced security rules audit Google Cloud credits bundled

Prices as of April 2026. Check official sites for the latest rates.

Migrating from Firebase to Supabase

Supabase provides official migration tooling. Here is the general path:

Export Firestore data — Use firebase export or the Firestore REST API to dump collections as JSON.
Design relational schema — Map Firestore documents/subcollections to Postgres tables with proper foreign keys and indexes.
Import into Supabase — Use the Supabase dashboard CSV import, psql COPY, or the migration scripts from supabase/firebase-to-supabase repo.
Migrate Auth users — Supabase provides a Firebase Auth migration tool that preserves password hashes so users don't need to reset passwords.
Migrate Storage — Transfer files from Cloud Storage to Supabase Storage (S3-compatible). Use gsutil to export, then upload via Supabase SDK or CLI.
Update client code — Replace Firebase SDK calls with Supabase client. The API surface is intentionally similar, so many patterns map 1:1.
Set up Row-Level Security — Translate Firebase Security Rules to Postgres RLS policies. This is the biggest conceptual shift.

Heads up: The hardest part is restructuring nested Firestore documents into normalized relational tables. Budget extra time for schema design and data transformation.

When to Pick Each

Choose Supabase when…

+ You need relational data with joins, views, and complex queries
+ Data ownership and avoiding vendor lock-in matter to you
+ You want to self-host for compliance, latency, or cost reasons
+ You're building a SaaS product, dashboard, or internal tool
+ You need vector search / AI embeddings (pgvector)
+ You prefer open-source and want to inspect/contribute to the code
+ You want edge functions with Deno for low-latency global compute
+ You're an indie hacker or startup that values predictable pricing

Choose Firebase when…

+ You're building a mobile-first app (iOS/Android) with offline sync
+ You need Crashlytics, Analytics, Remote Config, or A/B Testing
+ Your data is naturally document-shaped (social feeds, chat, IoT events)
+ You want ML Kit for on-device machine learning
+ Your team already lives in the Google Cloud ecosystem
+ You need static hosting with a CDN baked in
+ You prefer a mature platform with a decade of battle-testing
+ You need pay-per-use with no fixed monthly cost at small scale

The Bottom Line

In 2026, Supabase has closed the gap significantly and is now the default BaaS for new web projects, especially in the startup and indie hacker space. Firebase remains the stronger choice for mobile-heavy apps and teams deep in the Google ecosystem. If you're starting fresh and value open source, SQL, and portability, Supabase is the safer long-term bet. If you need the broadest mobile toolkit with offline-first sync, Firebase still leads.