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Reloop
vs
Postmark

Open-Source Postmark Alternative

Transactional email with deliverability focus, plus campaigns, self-hosting, and open-source transparency.

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Why teams switch from Postmark

  • Transactional-first with the same deliverability rigor
  • Marketing campaigns when you outgrow transactional-only
  • Self-hostable for compliance and data residency
  • Open-source codebase for security review

Grow without switching

Add campaigns on the same platform when marketing needs emerge.

Ownership

Postmark is proprietary hosted-only; Reloop gives you the source.

Modern API

Webhooks, SDKs, and sandbox for every major language.

Honest trade-offs

Choose Reloop when…

  • You want source access and a self-host exit ramp.
  • You send 50k+ emails/month and overage stings.
  • You need campaigns, inbound, and agent email in one place.

Stay on Postmark when…

  • Hosted-only simplicity already fits your workflow.
  • Volume is low and migration cost outweighs savings.
  • Your team lives in Postmark-native features.

This page is by Reloop Labs, the team behind Reloop. Pricing is public list prices as of 2026 — verify on reloop.sh/pricing and the competitor's site. Full head-to-head: Reloop vs Postmark.

Postmark-grade delivery, more flexibility

Start free and scale to self-hosted when ready.

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Reloop