Amazon SES vs Postmark
Amazon SES
aws.amazon.com
Postmark
postmarkapp.comSide by side
| Figure | Amazon SES | Postmark |
|---|---|---|
| Price from | — | $5/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 8 |
| Spec score · Email APIs | 7.8 (#19) | 8.6 (#6) |
| Spec score · Transactional Email Software | 7.8 (#30) | 8.7 (#7) |
| Spec score · Transactional email services | 7.1 (#38) | 9.2 (#1) |
| Integrations | AWS documentation describes integrations with EC2, Elastic Beanstalk, SNS, Route 53, IAM, S3, Lambda, KMS, CloudTrail, CloudWatch, Data Firehose, Redshift, and OpenSearch Service. | Official integrations include Slack, Zapier, Stripe, WordPress, Supabase, Bubble, Craft CMS, Netlify, and Gravity Forms. |
| Sending methods | Email can be sent through the SES console, SMTP interface, or SES API, accessed with the AWS CLI or an AWS SDK. | Applications can integrate with Postmark through its REST API or SMTP. |
Plans
Amazon SES
- À la carte pricingPrice not published
- EnterprisePrice not published
- EssentialsPrice not published
- ProPrice not published
Postmark
- FreeFree
- Basic$15 a month
- Pro$16.50 a month
- Platform$18 a month
- Custom activity retention$5 a month
- DMARC monitoring$14 a month
- Dedicated IP$50 a month
- High-volume plansPriced on request
In their own words
Amazon SES
Amazon SES has no write-up on Specifiction yet; its figures are above.
Postmark
Postmark delivers and tracks application email as an alternative to SMTP or Sendmail. It separates transactional and broadcast messages into different Message Streams and IP infrastructure. Developers can send through REST API, SMTP, or multi-region SMTP routing, with official libraries for Node.js, Python, Rails, Ruby, PHP, and.NET. Inbound messages can be converted to JSON and sent to a webhook URL. Tracking includes delivery, bounces, spam, opens, and links, with event webhooks. Editable responsive templates cover transactional messages such as password resets, receipts, and invitations. The free Developer plan costs nothing, provides 100 emails per month, permits no overages, and does not expire. Basic starts at $15 a month for 10,000 emails per month; extra emails cost $1.80 per 1,000 and are calculated at the end of the billing cycle. Unused emails do not roll over. Postmark lists API and web access. Its iOS app was sunset in June 2025 and is no longer supported.