Comparison
ZidiMail vs Postmark
Postmark is beloved for its deliverability — but it doesn't have a free plan. If you're building a side project, startup, or indie app, ZidiMail gives you production-grade deliverability at $0/month.
ZidiMail
Free forever
3,000 emails/month, your own domain, no credit card. Upgrade only when you grow.
Postmark
Paid-only
Starts at $15/month after a 100-email trial. No free plan for ongoing use.
| Feature | ZidiMail | Postmark |
|---|---|---|
| Free plan | ✅ 3,000 emails/mo | ❌ No free plan (trial only) |
| Credit card to start | ✅ Never required | ❌ Required after trial |
| Custom domain | ✅ Yes | ✅ Yes |
| SPF / DKIM / DMARC | ✅ Auto-configured | ✅ Auto-configured |
| Deliverability focus | ✅ Yes | ✅ Industry leading |
| Email templates | ❌ No | ✅ Yes (Postmark templates) |
| Message streams | ❌ No | ✅ Yes (transactional + broadcast) |
| Bounce suppression | ✅ ZidiGuard | ✅ Yes |
| Webhooks | ✅ Pro+ | ✅ All plans |
| Sandbox mode | ✅ Yes | ✅ Yes (test server) |
| Starting price | $0 (free plan) | $15/mo (no free plan) |
Choose ZidiMail if you…
- ✓Need a genuinely free plan (not just a trial)
- ✓Are in early stage and can't justify $15+/month
- ✓Want sandbox mode to test before going live
- ✓Need a clean REST API with no SDK required
- ✓Are fine without email templates (you write your own HTML)
Choose Postmark if you…
- →Need the absolute best deliverability reputation in the industry
- →Use Postmark's managed email templates
- →Need message streams to separate transactional from broadcast
- →Are at a well-funded startup and budget isn't a concern
- →Want best-in-class email support from a dedicated team
Why pay $15/mo when you can start free?
ZidiMail gives you production-grade deliverability on the free plan. No trial limits, no credit card.
Start for free →