Documentation-based comparison
Amazon SES versus Postmark
Compare documented scope and conditions. Unknowns remain unknown; different billing units do not establish a cost winner.
What the evidence answers
A reading of reviewed official documentation for Amazon SES and Postmark. It is not a hands-on test, a ranking or a recommendation of one product.
Price
- Amazon SES From $0.16 per 1,000 emails, first 10 million a month
- Essentials: $0.16 per 1,000 emails, first 10 million a month, no monthly base charge
- Pro: $105.00 monthly
- Enterprise: $500.00 monthly
- À la carte: $0.10 per 1,000 outbound emails, no monthly base charge
- Postmark From $15/mo
- Free: no subscription charge
- Basic: $15.00 monthly
- Pro: $16.50 monthly
- Platform: $18.00 monthly
- High volume: Vendor quotation required
Both list prices on the same basis. Compare what each plan includes; the lower amount alone does not make the better choice.
Documented for both
- Sending volume
- Amazon SES Quotas count recipients. In the sandbox: 200 emails per 24 hours and 1 per second; production quotas depend on your use case and can be raised.
- Postmark Unused emails do not roll over to the next billing period.Free: 100 emails per monthBasic: 10,000 emails per monthPro: 10,000 emails per monthPlatform: 10,000 emails per month
- Sender domains
- Amazon SES 10,000 verified identities per AWS Region
- Postmark Free: 10 custom sending domainsBasic: 5 custom sending domainsPro: 10 custom sending domainsPlatform: Unlimited custom sending domains
- Log retention
- Amazon SES Archiving is a paid add-on: USD 2 per GB ingested plus USD 0.19 per GB a month for storage and search.
- Postmark Custom activity retention starts at USD 5 a month and is only available on Pro plans or higher; statistics are kept indefinitely.Basic: 45 daysPro: Customizable up to 365 days; 45 days by defaultPlatform: Customizable up to 365 days; 45 days by default
- Webhooks and events
- Amazon SES Sending events (sends, deliveries, opens, clicks, bounces, complaints, rejections, rendering failures and delivery delays) can be published to CloudWatch, Data Firehose, Pinpoint, SNS or EventBridge.
- Postmark Inbound email is converted to JSON and posted to your webhook URL.Pro: Inbound email processing includedPlatform: Inbound email processing included
- Dedicated IP
- Amazon SES Essentials: Managed dedicated IPs are an add-onPro: Managed dedicated IPs included; SES warms them up and scales themEnterprise: Managed dedicated IPs included; SES warms them up and scales themÀ la carte: Standard dedicated IPs cost USD 24.95 per IP a month; managed dedicated IPs cost USD 15 a month per account plus USD 0.08 per 1,000 emails up to 10 million a month.
- Postmark From USD 50 a month per IP, for accounts sending 300,000 or more emails a month on Pro or higher.
- Support
- Amazon SES Production-access requests get an initial response from AWS Support within 24 hours.
- Postmark Support requests are handled by the customer success team through support tickets.
- Overage charges
- Amazon SES Outbound email is charged per recipient, and tier rates apply marginally: each rate covers only the emails within its tier.
- Postmark Extra emails on paid plans are calculated at the end of the billing cycle and added to the next month's charge.Free: No overages are allowed on Free.
Limits to check
- Amazon SES New accounts start in the sandbox in each AWS Region: verified recipients only, at most 200 messages per 24 hours and 1 per second, until production access is granted.
- Postmark There is no tier between the free 100 emails a month and the 10,000-email paid tier.
Not verified yet
Every compared requirement has evidence for at least one.
Not verified means our reviewed sources do not establish it. It does not mean a product lacks the capability or that it costs nothing.
Next steps
| Requirement | Amazon SES | Postmark |
|---|---|---|
| Pricing | From $0.16 per 1,000 emails, first 10 million a month | From $15/mo |
| Who it is for | Pay-as-you-go email on AWS, sent through the SES API, the SMTP interface or an AWS SDK. Verified Oct 11, 2026 · Amazon SES: official product and plan documentation | Sends transactional email and keeps bulk or broadcast email on separate Message Streams. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
| Coverage limits | New accounts start in the sandbox in each AWS Region: verified recipients only, at most 200 messages per 24 hours and 1 per second, until production access is granted. Verified Oct 11, 2026 · Amazon SES developer guide: moving out of the sandbox | There is no tier between the free 100 emails a month and the 10,000-email paid tier. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
| Sending volume | Quotas count recipients. In the sandbox: 200 emails per 24 hours and 1 per second; production quotas depend on your use case and can be raised. Quotas apply per AWS Region. Verified Oct 11, 2026 · Amazon SES developer guide: service quotas | Unused emails do not roll over to the next billing period. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Sender domains | 10,000 verified identities per AWS Region An identity is a domain or an email address. Verified Oct 11, 2026 · Amazon SES developer guide: service quotas |
|
| Log retention | Archiving is a paid add-on: USD 2 per GB ingested plus USD 0.19 per GB a month for storage and search. Listed as an add-on on Essentials, Pro and Enterprise. Verified Oct 11, 2026 · Amazon SES: official product and plan documentation | Custom activity retention starts at USD 5 a month and is only available on Pro plans or higher; statistics are kept indefinitely. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Webhooks and events | Sending events (sends, deliveries, opens, clicks, bounces, complaints, rejections, rendering failures and delivery delays) can be published to CloudWatch, Data Firehose, Pinpoint, SNS or EventBridge. Set up through configuration sets. Verified Oct 11, 2026 · Amazon SES developer guide: event publishing | Inbound email is converted to JSON and posted to your webhook URL. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Dedicated IP |
| From USD 50 a month per IP, for accounts sending 300,000 or more emails a month on Pro or higher. Fully managed by Postmark. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
| Support | Production-access requests get an initial response from AWS Support within 24 hours. Verified Oct 11, 2026 · Amazon SES developer guide: moving out of the sandbox | Support requests are handled by the customer success team through support tickets. The pricing page lists no support level per plan. Verified Oct 11, 2026 · Postmark support centre |
| Overage charges | Outbound email is charged per recipient, and tier rates apply marginally: each rate covers only the emails within its tier. Attachment data is charged on top at USD 0.12 per GB. Verified Oct 11, 2026 · Amazon SES: official product and plan documentation | Extra emails on paid plans are calculated at the end of the billing cycle and added to the next month's charge. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Coverage note | Starting tier; unlimited emails per day. Not listed on the Basic card. |