Choose Mailgun if you need
- Integration with n8n, Shopify or HubSpot. We haven't found them on Postmark's website.
- SOC 2, ISO 27001, HIPAA or SSO. We haven't found them on Postmark's website.
At a glance
- Both have a free plan.
- Postmark offers a free trial (length not stated). We haven't confirmed one for Mailgun.
- Mailgun's lowest paid plan is Basic at $15 per month for 10,000 emails, as of October 20, 2026.
- Postmark's lowest paid plan is Basic at $15.00 per month for 10,000 emails, as of October 20, 2026.
- Both are available on API and SMTP.
- Both work with Zapier, Slack and Datadog.
- Both list GDPR.
- Only Mailgun lists SOC 2, ISO 27001, HIPAA and SSO.
- Both have a public API.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Postmark if you need
- Integration with Supabase, Stripe or Netlify. We haven't found them on Mailgun's website.
Mailgun
Nobody has reviewed Mailgun yet. Its rating shows once it has 3 reviews.
Review Mailgun
Postmark
Nobody has reviewed Postmark yet. Its rating shows once it has 3 reviews.
Review PostmarkThe facts
- What it does
- MailgunTransactional email delivery service and API for developers
- PostmarkThe email delivery service that people actually like
- Free plan
- MailgunYes
- PostmarkYes
- Pricing
- MailgunNot confirmed
- PostmarkNot confirmed
- Paid plans from
- Mailgun
What they share
From the platforms and integrations each website lists.
Platforms
Both
- API
- SMTP
Only MailgunNothing else listed
Only PostmarkNothing else listed
Integrations
Both
- Zapier
- Slack
- Datadog
Only Mailgun
- n8n
- Shopify
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Mailgun and Postmark yet.
Used either of them?
Your review makes this comparison better for the next person. Review Mailgun or review Postmark.