MailKite Server
6.4#20 in email apisFree planFree planWebAPISelf-hosted
VisitMailKite Server vs Postmark
What both publish
| Fact | MailKite Server | Postmark |
|---|---|---|
| Integrations | MailKite lists official SDKs for Node.js, Python, Ruby, Go, PHP, Java, C#, and Rust, plus a CLI, an MCP server, and SMTP relay integrations. | Official integrations include Slack, Zapier, Stripe, WordPress, Supabase, Bubble, Craft CMS, Netlify, and Gravity Forms. |
| Security | Server components use HMAC-authenticated HTTP endpoints, and inbound webhook deliveries are signed and retried. | Postmark supports TLS and HTTPS, DKIM, SPF, DMARC, two-factor authentication, API permission controls, penetration testing, and DDoS protection. |
| Support | The self-hosted server page directs users to GitHub discussions and setup documentation; it describes human support as a MailKite Cloud offering. | Postmark offers support by email, live chat, and one-on-one calls and reports a 95% customer happiness rating. |
MailKite Server plans
- MailKite Server (AGPL-3.0)Free
Postmark plans
- FreeFree
- Basic$15 a month
- Pro$16.50 a month
- Platform$18 a month
- Custom activity retention$5 a month
- DMARC monitoring$14 a month
Pick MailKite Server if…
You want what its maker publishes above — check its page for the details.
Pick Postmark if…
Postmark suits developers who need to send application email through an API or SMTP and track delivery events. Its inbound processing and message streams also suit services handling both incoming and different types of outgoing email.