OpenSend
6.5#19 in email apisFrom $10 a monthFree planWebAPISelf-hosted
VisitOpenSend vs Postmark
What both publish
| Fact | OpenSend | Postmark |
|---|---|---|
| Integrations | The self-hosting guide documents AWS SES/SNS, PostgreSQL, Redis, S3, Cloudflare DNS automation, and Google OAuth configuration. | Official integrations include Slack, Zapier, Stripe, WordPress, Supabase, Bubble, Craft CMS, Netlify, and Gravity Forms. |
| Security | Dashboard and API routes are tenant-scoped through Better Auth organizations and server-side ownership checks. | Postmark supports TLS and HTTPS, DKIM, SPF, DMARC, two-factor authentication, API permission controls, penetration testing, and DDoS protection. |
| Support | The Free and Lite plans include community support, Starter has email support with a 48-hour response target, and Growth has priority support with a 12-hour target. | Postmark offers support by email, live chat, and one-on-one calls and reports a 95% customer happiness rating. |
OpenSend plans
- Lite$10 a month
- Starter$19 a month
- Growth$99 a month
- Free—
- ScalePriced on request
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 OpenSend 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.