Amazon SES vs Postmark
Amazon SES and Postmark are both popular choices in the transactional email service space. Amazon SES starts at free versus $15/1,000 emails for Postmark. Both offer free plans to get started.
Quick Verdict
Amazon SES wins on integrations.
Postmark wins on deliverability, rating.
Best for most users: Postmark (saas applications).
Amazon SES
Cheapest email at scale on AWS infrastructure
Amazon SES is AWS's cloud-based email sending service that processes over a trillion emails annually for customers like Netflix and Duolingo. At just $0.10 per 1,000 emails with no minimum commitments, it is the most cost-effective option for developers and businesses already in the AWS ecosystem who need raw transactional email infrastructure at massive scale.
Postmark
Transactional email with exceptional deliverability, now by ActiveCampaign
Postmark, originally built by Wildbit and acquired by ActiveCampaign in 2022, is a transactional email service laser-focused on deliverability and speed. It consistently achieves near-99% inbox placement rates and processes emails in sub-second times, making it the top choice for developers who refuse to compromise on email reaching the inbox.
Feature Comparison
| Feature | Amazon SES | Postmark |
|---|---|---|
| Rating | 4.4/5 | 4.6/5 |
| Starting Price | Usage-based | $15/mo |
| Free Plan | 3,000 emails/month for first 12 months | 100 emails/month, never expires, test integration and side projects |
| Founded | 2011 | 2009 |
| Email Templates | 0 | 20 |
| Integrations | 50 | 30 |
| Deliverability Rate | 95% | 98.7% |
| Marketing Automation | ✕ | ✕ |
| A/B Testing | ✕ | ✕ |
| Landing Pages | ✕ | ✕ |
| Segmentation | ✕ | ✕ |
| Drag & Drop Editor | ✕ | ✕ |
| SMS Marketing | ✕ | ✕ |
| Ecommerce Features | ✕ | ✕ |
| API Access | ✓ | ✓ |
| Multi-Language | ✕ | ✕ |
| Web Push Notifications | ✕ | ✕ |
| Live Chat | ✕ | ✕ |
| Advanced Analytics | ✓ | ✓ |
Amazon SES: Pros & Cons
Pros
- +Extremely low cost at $0.10 per 1,000 emails, making it the cheapest option for high-volume sending
- +Native integration with AWS ecosystem including Lambda, SNS, CloudWatch, and IAM
- +Handles over a trillion emails per year with enterprise-grade reliability and uptime
- +Built-in support for SPF, DKIM, and DMARC email authentication out of the box
- +Flexible IP options including shared, dedicated ($24.95/mo), and managed dedicated IPs
Cons
- −Steep learning curve requiring AWS expertise for domain verification, DKIM, SPF, and IAM setup
- −No visual drag-and-drop email editor or built-in template builder included
- −Limited customer support; no phone support and documentation can be hard to navigate
- −Strict sending limits initially; requires a production access request to leave the sandbox
- −Advanced analytics like click tracking require additional services like Amazon Pinpoint at extra cost
Postmark: Pros & Cons
Pros
- +Industry-leading deliverability rates — 98.7% inbox placement confirmed in third-party tests by Hackceleration (2026)
- +Extremely fast email delivery with sub-second processing times for transactional messages
- +Clean, intuitive dashboard with detailed delivery analytics including bounce tracking, spam complaints, and open rates
- +Pre-built responsive HTML templates for common transactional emails (welcome, password reset, receipts, invoices)
- +Simple, volume-based pricing with no hidden fees — free tier never expires and is great for testing
Cons
- −Very limited free tier at only 100 emails/month compared to competitors offering thousands
- −No marketing email features — strictly transactional and broadcast; no automation, sequences, or segmentation
- −Some users report customer service quality declined after the ActiveCampaign acquisition in 2022
- −No built-in drag-and-drop email editor; templates require HTML knowledge to customize
- −Overage rates ($1.20-$1.80 per 1,000) can add up quickly for unpredictable sending volumes
The Verdict
Amazon SES and Postmark are closely matched — both score within 0.2 points of each other in our overall rating. Your decision should come down to specific needs rather than overall quality. On deliverability, Postmark reports 98.7% compared to 95% for Amazon SES — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Amazon SES | Postmark |
|---|---|---|---|
| Starting Price | 30% | Free | $15/mo |
| Deliverability | 25% | 95% | 98.7% |
| Rating | 25% | 4.4/5 | 4.6/5 |
| Integrations | 10% | 50 | 30 |
| Free Tier | 10% | Yes | Yes |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose Amazon SES if…
- + You're a aws native developers
- + You're a high volume transactional senders
- + Extremely low cost at $0.10 per 1,000 emails, making it the cheapest option for high-volume sending
Choose Postmark if…
- + You're a saas applications
- + You're a transactional email senders
- + Industry-leading deliverability rates — 98.7% inbox placement confirmed in third-party tests by Hackceleration (2026)