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Head-to-Head Specification Audit
Supabase vs Postmark
Open Source Firebase Alternative · Global
Specification Matrix
| Metric | Supabase | Postmark |
|---|---|---|
| Starting Price | $25/mo | $15/moBetter |
| API Rate Limit | 500 req/min | N/A |
| Target Country | Global | Global |
| Category | Database & Backend | Email API |
| Compliance | SOC2, GDPR, HIPAA-Enterprise | GDPR, SOC2 |
| Hosting Regions | EU-West, US-East, AP-Southeast | US-East, EU-West |
| Native Integrations | 6 listedBetter | 6 listed |
Supabase — Key Specs
- ✓PostgreSQL with RLS, Edge Functions, Realtime, Auth, Storage
- ✓pgvector extension: vector similarity search without Pinecone
- ✓SOC 2 Type II, GDPR DPA (EU data residency available)
- ✓Free tier: 500MB database + 2GB storage forever
Postmark — Key Specs
- ✓Average delivery time of 3.2 seconds — fastest transactional delivery benchmarked
- ✓Message Streams separate transactional from bulk email — protects domain reputation
- ✓GDPR-compliant EU-only sending available for EU data residency requirements
- ✓10-year email storage and retrieval via Message Retention add-on
Frequently Asked Questions
What is cheaper, Supabase or Postmark?+
Postmark starts at $15/mo, which is lower than Supabase at $25/mo.
Which tool is better for compliance — Supabase or Postmark?+
Both support SOC2, GDPR. Supabase additionally supports HIPAA-Enterprise.
Which tool is better suited for Global?+
Supabase is evaluated for Open Source Firebase Alternative in Global with hosting regions: EU-West, US-East, AP-Southeast. Postmark has hosting regions: US-East, EU-West. For data residency in Global, check each vendor's data processing agreements.
Data last verified: 26 June 2026
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