Postmark alternatives
Providers that compete with Postmark on at least one of: Transactional
Transactional-only, fast and well-delivered.
Switching as SaaS product teams
A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.
Postmark does not cover operating track record, scheduling, and best published rate per 1,000. MailerSend, Mailgun, and Loops close that gap. The order below weighs this audience's priorities first, so it differs from a general popularity ranking.
ranked for SaaS product teams
- 01
MailerSend
TransactionalModern transactional API with a clean UI.
Adds scheduling over Postmark, with nothing given up on these priorities.
500/mo permanent · $7/mo for 5,000 emails - 02
Mailgun
TransactionalDeveloper-leaning email infra, owned by Sinch.
Adds scheduling over Postmark, with nothing given up on these priorities.
100/day permanent free plan · $15/mo for 10,000 emails (Basic) - 03
Mailtrap
Transactional TestingOriginally a staging inbox, now a sender too.
Matches Postmark 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 - 04
SMTP2GO
TransactionalReliable SMTP relay with strong deliverability.
Matches Postmark on every priority weighed here, so the decision is price and preference.
1,000/mo permanent · $10/mo for 10,000 emails - 05
Cloudflare Email Service
Inbound TransactionalFree routing, programmable inbound via Workers, sending in beta.
Gives up webhook coverage against Postmark 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) - 06
Loops
Marketing TransactionalModern lifecycle and broadcast email for SaaS.
Adds scheduling, gives up multi-tenant support.
1,000 contacts and 4,000 sends/mo on the Free plan · $49/mo for 5,000 contacts - 07
Resend
TransactionalEmail API tightly coupled to React Email.
Adds scheduling, gives up multi-tenant support.
3,000/mo permanent, capped at 100/day, one domain · $20/mo for 50,000 emails - 08
Brevo
Transactional MarketingAll-in-one with a generous daily free tier.
Adds scheduling, gives up multi-tenant support.
300/day permanent · $9/mo for 5,000 emails
Postmark and its alternatives, side by side
Columns are the priorities SaaS product teams weigh, in order. Postmark is the first row so the trade in each direction is readable at a glance.
| Provider | Multi-tenant | Event stream | Suppressions API | Operating since | Scheduling | Best published rate per 1,000 | Webhooks |
|---|---|---|---|---|---|---|---|
| Postmark | Yes | Yes | Yes | 2010 | No | $1.50 | Yes |
| MailerSend | Yes | Yes | Yes | 2020 | Yes | Tiers not published in comparable form | Yes |
| Mailgun | Yes | Yes | Yes | 2010 | Yes | $0.70 | Yes |
| Mailtrap | Yes | Yes | Yes | 2014 | No | Tiers not published in comparable form | Yes |
| SMTP2GO | Yes | Yes | Yes | 2006 | No | Tiers not published in comparable form | Yes |
| Cloudflare Email Service | Yes | Yes | Yes | Not published | No | Tiers not published in comparable form | No |
| Loops | No | Yes | Yes | 2022 | Yes | Tiers not published in comparable form | Yes |
| Resend | No | Yes | Yes | 2023 | Yes | $0.35 | Yes |
| Brevo | No | Yes | Yes | 2012 | Yes | Tiers not published in comparable form | Yes |
MailerSend and Mailgun add capability without giving anything up on these priorities. The rest trade one thing for another.
before you switch
Postmark 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.