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Head-to-Head Specification Audit
Postmark vs Supabase
SaaS Developers · Global
Specification Matrix
| Metric | Postmark | Supabase |
|---|---|---|
| Starting Price | $15/moBetter | $25/mo |
| API Rate Limit | N/A | 500 req/min |
| Target Country | Global | Global |
| Category | Email API | Database & Backend |
| Compliance | GDPR, SOC2 | GDPR, SOC2, HIPAA |
| Hosting Regions | US-East, EU-West | US-East, EU-West, AP-Southeast |
| Native Integrations | 6 listed | 7 listedBetter |
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
Supabase — Key Specs
- ✓Full PostgreSQL — no proprietary query language lock-in
- ✓Built-in Auth, Realtime, and Storage in a single project dashboard
- ✓Row Level Security (RLS) policies enforce data access at the database layer
- ✓REST and GraphQL APIs auto-generated from your schema — zero boilerplate
Frequently Asked Questions
What is cheaper, Postmark or Supabase?+
Postmark starts at $15/mo, which is lower than Supabase at $25/mo.
Which tool is better for compliance — Postmark or Supabase?+
Both support GDPR, SOC2. Supabase additionally supports HIPAA.
Which tool is better suited for Global?+
Postmark is evaluated for SaaS Developers in Global with hosting regions: US-East, EU-West. Supabase has hosting regions: US-East, EU-West, AP-Southeast. For data residency in Global, check each vendor's data processing agreements.
Data last verified: 12 June 2026
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