Reloop
vsPostmark
Best Postmark Alternative
Transactional email with deliverability focus—plus campaigns, self-hosting, and open-source transparency.
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.
Postmark-grade delivery, more flexibility
Start free and scale to self-hosted when ready.