Mailgun alternatives
Providers that compete with Mailgun on at least one of: Transactional
Developer-leaning email infra, owned by Sinch.
Switching as developers picking email infrastructure
The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.
Mailgun does not cover idempotency keys, operating track record, and best published rate per 1,000. Resend is the only option below that closes that gap. The order below weighs this audience's priorities first, so it differs from a general popularity ranking.
ranked for developers picking email infrastructure
- 01
Resend
TransactionalEmail API tightly coupled to React Email.
Adds idempotency keys over Mailgun, 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.
Matches Mailgun on every priority weighed here, so the decision is price and preference.
100/mo developer plan · $15/mo for 10,000 emails - 03
Loops
Marketing TransactionalModern lifecycle and broadcast email for SaaS.
Matches Mailgun on every priority weighed here, so the decision is price and preference.
1,000 contacts and 4,000 sends/mo on the Free plan · $49/mo for 5,000 contacts - 04
Mailtrap
Transactional TestingOriginally a staging inbox, now a sender too.
Matches Mailgun on every priority weighed here, so the decision is price and preference.
4,000/mo (sending), free testing tier · $15/mo for 10,000 sending - 05
MailerSend
TransactionalModern transactional API with a clean UI.
Matches Mailgun on every priority weighed here, so the decision is price and preference.
500/mo permanent · $7/mo for 5,000 emails - 06
Brevo
Transactional MarketingAll-in-one with a generous daily free tier.
Matches Mailgun on every priority weighed here, so the decision is price and preference.
300/day permanent · $9/mo for 5,000 emails - 07
SMTP2GO
TransactionalReliable SMTP relay with strong deliverability.
Matches Mailgun on every priority weighed here, so the decision is price and preference.
1,000/mo permanent · $10/mo for 10,000 emails - 08
Cloudflare Email Service
Inbound TransactionalFree routing, programmable inbound via Workers, sending in beta.
Gives up webhook coverage against Mailgun and adds nothing on these priorities.
Email Routing free; Email Workers on Workers Free plan · Sending: $0.35 per 1,000 messages (Workers Paid required, $5/mo)
Mailgun and its alternatives, side by side
Columns are the priorities developers picking email infrastructure weigh, in order. Mailgun is the first row so the trade in each direction is readable at a glance.
| Provider | DX score | SDKs | Idempotency keys | Operating since | Event stream | Best published rate per 1,000 | Webhooks |
|---|---|---|---|---|---|---|---|
| Mailgun | 7/10 | node, python, go, ruby, php, java | No | 2010 | Yes | $0.70 | Yes |
| Resend | 8/10 | node, python, go, ruby, php, rust, java, elixir, cli | Yes | 2023 | Yes | $0.35 | Yes |
| Postmark | 9/10 | node, python, go, ruby, php, java, elixir, rust, dotnet | No | 2010 | Yes | $1.50 | Yes |
| Loops | 9/10 | node, python, go, ruby, php | No | 2022 | Yes | Tiers not published in comparable form | Yes |
| Mailtrap | 8/10 | node, python, go, ruby, php, elixir | No | 2014 | Yes | Tiers not published in comparable form | Yes |
| MailerSend | 8/10 | node, python, go, ruby, php | No | 2020 | Yes | Tiers not published in comparable form | Yes |
| Brevo | 7/10 | node, python, go, ruby, php, java, dotnet | No | 2012 | Yes | Tiers not published in comparable form | Yes |
| SMTP2GO | 7/10 | node, python, go, ruby, php | No | 2006 | Yes | Tiers not published in comparable form | Yes |
| Cloudflare Email Service | 8/10 | node | No | Not published | Yes | Tiers not published in comparable form | No |
Resend adds capability without giving anything up on these priorities. The rest trade one thing for another.
before you switch
Mailgun pricing, tier by tier
All 3 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.