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Elixir email SDKs

The Phoenix ecosystem leans on Swoosh adapters. Native SDKs are less common.

Most Elixir teams should pick the provider with a maintained Swoosh adapter rather than a custom HTTP wrapper.

what to evaluate

Considerations

Use these lenses when comparing the picks below.

  • Swoosh adapter availability.
  • Telemetry events for observability.
  • Hex package maintenance.

top picks

  1. 01

    Postmark

    Transactional

    Maintained Swoosh adapter.

    100/mo developer plan · $15/mo for 10,000 emails
  2. 02

    Mailgun

    Transactional

    Swoosh adapter present.

    100/day permanent free plan · $15/mo for 10,000 emails (Basic)
  3. 03

    Amazon SES

    Transactional

    Swoosh SES adapter via ExAws.

    Up to $200 in AWS Free Tier credits for new accounts · $0.10 per 1,000 emails
also available

Other providers shipping a Elixir SDK

Resend Transactional

Email API tightly coupled to React Email.
Mailtrap Transactional

Originally a staging inbox, now a sender too.
Knock Notifications

Notification infrastructure with workflow engine.
Framework integrations →

reading this as early-stage startups

At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.

Applied to Elixir SDKs, that means weighing free tier, best published rate per 1,000, entry price, and developer experience ahead of the rest, against a waitlist, a launch announcement, onboarding email, and the first transactional sends.