Amazon SES vs Postmark
A detailed comparison to help you choose between Amazon SES and Postmark.
Quick Verdict
4.0/5
Amazon SES
0 reviews
4.2/5
Postmark
0 reviews
Postmark is rated higher (4.2 vs 4.0). New accounts get up to $200 in AWS Free Tier credits with a 6-month free plan; the old 62,000/month EC2 allowance is no longer listed on the pricing page Postmark is a transactional email service with best-in-class inbox delivery rates. Focuses solely on transactional email (not marketing). Detailed bounce analytics, message streams, and server-side DKIM.
 Amazon SES Cheapest bulk email API — $0.10 per 1,000 emails | Postmark Fastest transactional email delivery — inbox-focused | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (0 reviews) | 4.2 (0 reviews)✓ |
| Pricing model | pay-as-you-go | freemium |
| Starting price | Free tier available | Free tier available |
| Best for | Engineering teams on AWS sending transactional or bulk email at volume who want the lowest per-email cost and can own deliverability operations. | SaaS developers who need dependable delivery for password resets, receipts, and notifications, with the analytics to prove it landed |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Tags | ||
| Tags | free tierapi accessus datacentereu datacenterapac datacenter | free tierapi access |
| Visit Amazon SES → | Visit Postmark → | |
Amazon SES
Pros
- + Lowest published per-email rate: $0.10 per 1,000 emails, no plan required
- + Same-region integration with EC2, Lambda, IAM, and CloudWatch
- + Transparent pricing page covering add-ons and plan bands
- + Global Endpoints for multi-region sending resilience
- + Scales to very high volume without provisioning infrastructure
Cons
- - Sandbox start (200 messages/day to verified recipients) with an opaque production-access review
- - No marketing tooling, templates, or dashboards — it is a pipe, not a suite
- - Dedicated IPs, attachments, and deliverability add-ons inflate the real bill
- - Deliverability and IP warm-up are your responsibility
Postmark
Pros
- + Transactional/broadcast stream separation protects application email reputation
- + Real free tier: 100 emails/month forever, no expiry — good for evaluating deliverability honestly
- + Published, tiered pricing with explicit overage rates and no sales-gated numbers
- + Deep per-message delivery and bounce analytics with sandbox testing mode
- + Boring in the good way: stable SMTP/API since 2010 with the team carried through the 2022 acquisition
Cons
- - Per-email cost is well above SendGrid at volume
- - No marketing campaigns, contact lists, or automation — transactional and broadcast sending only
- - Inbound processing, long retention, and dedicated IPs gated behind higher tiers and volume minimums
- - Owned by ActiveCampaign since 2022; long-term product consolidation is a real, if mild, risk
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