Warming up
Every account now comes with a free mailbox — warmed automatically, no domain to buy. See how it works
Transactional email API
Every account now comes with a free mailbox — warmed automatically, no domain to buy. See how it works
Choose Amazon SES if you send a lot, have engineers, and want the lowest per-email price; choose Mailgun if you want webhooks, templates, logs and inbound routing already built. On list prices as of September 2026: at 10,000 Amazon SES lists lower ($1 against $15); at 50,000 Amazon SES lists lower ($5 against $35); at 100,000 Amazon SES lists lower ($10 against $90). The 500,000 row is left open because a plan at that size is not priced here. Prices are the cheapest published monthly plan that covers each volume, with overage left out.
What each one lists for the same monthly volume, from their own pricing pages.
| Emails a month | Amazon SES | Mailgun | Warmerly |
|---|---|---|---|
| 10,000 | $1$0.10 per 1,000 | $15Basic 10k | $15Starter |
| 50,000 | $5$0.10 per 1,000 | $35Foundation 50k | $15Starter |
| 100,000 | $10$0.10 per 1,000 | $90Scale 100k | $29Growth |
| 500,000 | $50$0.10 per 1,000 | see vendor site | $279Scale 500k |
List prices, monthly billing, USD: the cheapest published plan that includes that many emails, overage left out. Prices from aws.amazon.com/ses and mailgun.com as of September 2026; check their sites for current rates. Shaded cells are the cheaper of the two; Warmerly is shown for reference.
What each one does today. Warmerly is a third option for API-only app email; where it says "not yet", it means it.
| Feature | Amazon SES | Mailgun | Warmerly |
|---|---|---|---|
| API shape | AWS SDK or signed HTTPS API (SendEmail v2); AWS credentials | REST, form-encoded POST to /v3/{domain}/messages, HTTP Basic auth with your API key | REST, JSON over HTTPS, bearer key, Idempotency-Key header |
| SMTP relay | Yes | Yes | Not yet (on the roadmap) |
| Delivery webhooks | Events go to SNS, EventBridge or Firehose; you build the consumer | Yes | Not yet. Read each email's delivery timeline from GET /emails/{id} |
| Templates | Yes (SES templates) | Yes, from the Foundation plan | Not yet. You send your own HTML and text |
| Dedicated IP | $24.95/mo per IP; managed IPs $15/mo plus a per-email fee | One included on Scale; $59/mo for each extra IP | $29/mo on Scale plans |
| Suppression list | Account-level suppression list; anything per app is yours to build | Bounces, complaints and unsubscribes are suppressed automatically | Automatic on hard bounce and spam complaint, shared with Warmerly outreach |
| Free tier | Up to $200 in AWS Free Tier credits for new AWS customers, for 6 months | 100 emails a day, with 1 day of logs | 5,000 a month (200 a day), no time limit, no card |
| Log retention | No message log to browse by default; you store the events you want | 1 day on Free and Basic, 5 on Foundation, 30 on Scale | Content 30 days; the email record and its delivery events are kept |
| SDKs | Every AWS SDK | Official libraries for several languages (see mailgun.com) | None. One HTTP request from any language |
| Support | AWS Support plans (technical support needs a paid plan) | See mailgun.com | Email (support@warmerly.com), plus a 99.9% monthly uptime commitment with service credits |
Neither is right for everyone. These are the cases that decide it.
Warmerly sends through Amazon SES and keeps transactional mail apart from cold outreach. It has a free plan of 5,000 emails a month, but it is REST only today: no SMTP relay, delivery webhooks or templates yet. If an API is all you need, see how it compares on the Amazon SES alternative and Mailgun alternative pages.
On list prices as of September 2026: at 10,000 Amazon SES lists lower ($1 against $15); at 50,000 Amazon SES lists lower ($5 against $35); at 100,000 Amazon SES lists lower ($10 against $90). The 500,000 row is left open because a plan at that size is not priced here. Overage rates and plans larger than those compared are not included, so check each vendor's pricing page for your exact volume.
Amazon SES: Up to $200 in AWS Free Tier credits for new AWS customers, for 6 months. Mailgun: 100 emails a day, with 1 day of logs.
Amazon SES: Yes. Mailgun: Yes.
Amazon SES: No message log to browse by default; you store the events you want. Mailgun: 1 day on Free and Basic, 5 on Foundation, 30 on Scale.
Warmerly is a transactional email API that sends through Amazon SES. It lists $15 a month for 50,000 emails and a free plan of 5,000 emails a month, but it is REST only and has no SMTP relay, webhooks or templates yet. Compare it on the Amazon SES alternative and Mailgun alternative pages.
Create a free account, verify a sending domain and send a test from the dashboard. 5,000 emails a month free, no card.
