BaaS Architectural Showdown • 2026 Edition
Supabase vs Firebase: 2026 Production Bill, Architecture & Feature Comparison
Firestore charges $0.06 per 100,000 document reads. Supabase charges for persistent Postgres compute. When does Firebase become 10x more expensive than Supabase?
Direct Answer • The Operations vs Compute Decision
Supabase is significantly cheaper for active SaaS and high-traffic web applications. Because Supabase bills for server compute (starting at $25/mo Pro with unlimited query reads/writes), reading 100 million rows costs $0 extra. In Firebase Firestore, 100 million reads costs $60.00/month on operations alone, plus steep $0.12/GB egress fees. Firebase is only cheaper for dormant apps or tiny hobby MVPs that fit inside the 50k daily free reads.
Monthly Read/Write Bill Simulator
Compare Firebase Firestore operational charges against Supabase Pro compute and storage.
Projected Monthly Invoices
Firebase Firestore:
$23.16
Supabase Pro (Includes Small Addon):
$47.75
Economic Outcome:
Firebase is $24.59 cheaper
At this modest traffic, Firebase operation costs remain low. Scale reads above 50M to see Supabase take the lead.
1. Architecture & Pricing Comparison
The fundamental difference between Supabase and Firebase is relational compute vs serverless document operations:
| Metric | Supabase Pro | Google Firebase (Firestore) |
|---|---|---|
| Database Engine | PostgreSQL 16 (Full SQL, Extensions, pgvector) | Firestore (NoSQL Document Store) |
| Query Read Pricing | Unlimited reads (bounded by CPU/RAM) | $0.06 per 100,000 document reads |
| Write Pricing | Unlimited writes (bounded by IOPS) | $0.18 per 100,000 document writes |
| Monthly Base Subscription | $25 / month | $0 (Pay-as-you-go Blaze plan) |
| Storage Cost | $0.125 / GB (8 GB included) | $0.18 / GB (1 GB included) |
| Data Egress | $0.09 / GB (250 GB included) | $0.12 / GB (10 GB/mo free pool) |
| Self-Hostable / Open Source | 100% Yes (Docker, self-managed) | No (Proprietary GCP lock-in) |
2. Why Developers Flee Firebase for Supabase
The Firebase Pitfalls:
- Unbounded List Queries: Fetching a collection of 5,000 documents to display a dashboard table bills you 5,000 document reads per page refresh.
- No Native Vector Search: Firestore requires external vector extensions or pairing with Vertex AI, complicating RAG pipelines.
- Vendor Lock-in: If Google raises Firestore rates, migrating a deeply coupled NoSQL database to Postgres requires a painful multi-month schema rewrite.
The Supabase Advantages:
- Standard SQL Joins: Aggregate 100,000 rows into a single summary report with
COUNT(*)without paying for 100,000 read operations. - Native pgvector: Store AI embeddings and search nearest neighbors directly inside your primary relational tables.
- Self-Host Portability: If Supabase Cloud gets too expensive, export your Postgres dump and run it on AWS RDS or a $40 Hetzner dedicated box.
Frequently Asked Questions
Is Supabase cheaper than Firebase?
For applications with high read volumes or complex analytical queries, Supabase is significantly cheaper. Supabase does not bill per read or write operation—you pay for server compute and disk storage. In contrast, Firebase Firestore bills $0.06 per 100,000 document reads, which can lead to four-figure monthly bills if a dashboard or search query reads thousands of documents per page load.
When is Firebase cheaper than Supabase?
Firebase is cheaper for hobby projects or low-traffic apps with sparse document access. Firebase's free tier provides 50,000 reads and 20,000 writes daily with no monthly server base fee, whereas Supabase Pro requires $25/month for persistent production workloads.
Can you self-host Supabase to eliminate cloud costs?
Yes. Supabase is 100% open source under Apache 2.0. You can run the entire Supabase stack (Postgres, GoTrue Auth, PostgREST, Realtime, Storage) via Docker on your own VPS or AWS EC2 instance. Firebase is proprietary to Google Cloud and cannot be self-hosted.