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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 teams choosing a transactional API

Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.

Applied to Elixir SDKs, that means weighing idempotency keys, webhook coverage, event stream, and operating track record ahead of the rest, against high-frequency programmatic sends where a missed delivery is a product failure.