Amazon SES alternatives
Providers that compete with Amazon SES on at least one of: Transactional
Cheapest at scale, most setup work.
Best AWS SES alternatives: a hand-picked, ranked list with rationale per position.
Switching as teams building autonomous agents
An agent stack treats email as a two-way primitive. Inbound has to arrive as structured JSON a tool call can consume, sends have to be safe to retry when a model loop repeats itself, and every action needs an audit trail. A provider without inbound parsing only solves half the problem.
Amazon SES does not cover idempotency keys, webhook coverage, operating track record, best published rate per 1,000, and multi-tenant support. Resend, Postmark, and MailerSend close that gap. The order below weighs this audience's priorities first, so it differs from a general popularity ranking.
ranked for teams building autonomous agents
- 01
Resend
TransactionalEmail API tightly coupled to React Email.
Adds idempotency keys and webhook coverage over Amazon SES, with nothing given up on these priorities.
3,000/mo permanent, capped at 100/day, one domain · $20/mo for 50,000 emails - 02
Postmark
TransactionalTransactional-only, fast and well-delivered.
Adds webhook coverage and multi-tenant support over Amazon SES, with nothing given up on these priorities.
100/mo developer plan · $15/mo for 10,000 emails - 03
MailerSend
TransactionalModern transactional API with a clean UI.
Adds webhook coverage and multi-tenant support over Amazon SES, with nothing given up on these priorities.
500/mo permanent · $7/mo for 5,000 emails - 04
Mailgun
TransactionalDeveloper-leaning email infra, owned by Sinch.
Adds webhook coverage and multi-tenant support over Amazon SES, with nothing given up on these priorities.
100/day permanent free plan · $15/mo for 10,000 emails (Basic) - 05
Brevo
Transactional MarketingAll-in-one with a generous daily free tier.
Adds webhook coverage over Amazon SES, with nothing given up on these priorities.
300/day permanent · $9/mo for 5,000 emails - 06
Cloudflare Email Service
Inbound TransactionalFree routing, programmable inbound via Workers, sending in beta.
Adds multi-tenant support over Amazon SES, with nothing given up on these priorities.
Email Routing free; Email Workers on Workers Free plan · Sending: $0.35 per 1,000 messages (Workers Paid required, $5/mo) - 07
Mailtrap
Transactional TestingOriginally a staging inbox, now a sender too.
Adds webhook coverage and multi-tenant support, gives up inbound parsing.
4,000/mo (sending), free testing tier · $15/mo for 10,000 sending - 08
Loops
Marketing TransactionalModern lifecycle and broadcast email for SaaS.
Adds webhook coverage, gives up inbound parsing.
1,000 contacts and 4,000 sends/mo on the Free plan · $49/mo for 5,000 contacts
Amazon SES and its alternatives, side by side
Columns are the priorities teams building autonomous agents weigh, in order. Amazon SES is the first row so the trade in each direction is readable at a glance.
| Provider | Inbound parsing | Idempotency keys | Webhooks | Operating since | Event stream | Best published rate per 1,000 | Batch sending | SDKs | Multi-tenant |
|---|---|---|---|---|---|---|---|---|---|
| Amazon SES | Yes | No | No | 2011 | Yes | $0.10 | Yes | node, python, go, ruby, php, java, rust, dotnet | No |
| Resend | Yes | Yes | Yes | 2023 | Yes | $0.35 | Yes | node, python, go, ruby, php, rust, java, elixir, cli | No |
| Postmark | Yes | No | Yes | 2010 | Yes | $1.50 | Yes | node, python, go, ruby, php, java, elixir, rust, dotnet | Yes |
| MailerSend | Yes | No | Yes | 2020 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php | Yes |
| Mailgun | Yes | No | Yes | 2010 | Yes | $0.70 | Yes | node, python, go, ruby, php, java | Yes |
| Brevo | Yes | No | Yes | 2012 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, java, dotnet | No |
| Cloudflare Email Service | Yes | No | No | Not published | Yes | Tiers not published in comparable form | Yes | node | Yes |
| Mailtrap | No | No | Yes | 2014 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php, elixir | Yes |
| Loops | No | No | Yes | 2022 | Yes | Tiers not published in comparable form | Yes | node, python, go, ruby, php | No |
Resend, Postmark, and MailerSend add capability without giving anything up on these priorities. The rest trade one thing for another.
before you switch
Amazon SES pricing, tier by tier
All 4 paid tiers with effective cost per 1,000 emails. Worth checking whether the cost curve, rather than the feature set, is what is prompting the switch.