Postmark vs MailerSend
Comparing pricing tiers, deliverability architectures, and feature support for transactional and marketing senders.
Editorial Verdict
MailerSend undercuts Postmark on entry cost ($7/mo Hobby incl 5k vs $15/mo incl 10k, then $1.50/1k vs $1.25/1k overage) and adds a friendlier all-in-one dashboard; Postmark counters with 45-day history, deeper deliverability pedigree, and a self-serve dedicated IP (MailerSend reserves IPs for Enterprise). Pick MailerSend for budget + UX; Postmark for mission-critical transactional trust.
Cost Benchmark Across Typical Workloads
Starter SaaS 10,000 emails/mo (95% tx)
Postmark $15.00/mo
vs
MailerSend $13.04/mo
Active Product 75,000 emails/mo (80% tx)
Postmark $77.40/mo
vs
MailerSend $47.48/mo
Scale Broadcast 500,000 emails/mo (50% tx)
Postmark $364.94/mo
vs
MailerSend $294.68/mo
Detailed Architectural Comparison
Postmark
Visit Postmark →Key Strengths
- Lower overage beyond included volume ($1.25 vs $1.50 per 1k)
- 45-day searchable message retention (both default to 30)
- Self-serve dedicated IP at $50/mo
- Two decades of transactional-only deliverability focus
Trade-offs & Gotchas
- Pricier entry point for very small senders
- No marketing features whatsoever
MailerSend
Visit MailerSend →Key Strengths
- Entry plan half the price: $7/mo incl 5k emails
- Modern, approachable dashboard for non-developer teammates
- Suppression management and split testing built in
- Free tier of 500 emails/month (Postmark: 100 test sends)
Trade-offs & Gotchas
- Dedicated IP gated behind Enterprise (>100k/week), not self-serve
- Shorter track record in hard-deliverability niches
Feature Matrix Comparison
| Feature Capability | Postmark | MailerSend |
|---|---|---|
| Webhooks Event Dispatch | ✓ Included | ✓ Included |
| React Email / Modern SDKs | ✓ Native Support | ✓ Native Support |
| Inbound Email Routing / Parsing | ✓ Supported | ✓ Supported |
| Visual Drag & Drop Template Builder | ✓ Included | ✓ Included |
| Standard SMTP Relay | ✓ Supported | ✓ Supported |
| Sub-account / Multi-tenant Hierarchy | ✓ Supported | ✓ Supported |
| Activity & Search Retention | 45 Days | 30 Days |
| Dedicated IP Monthly Fee | $50/mo | N/A |
| EU Sovereign Data Residency (GDPR) | US Cloud | US Cloud |
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