Open source alternatives to Postmark
One project on starwire does the same job. Ranked by how much of what Postmark does each one covers, read from its README and website. Ties go to the most active.
What Postmark does
- Transactional email APIcore
- SMTP relaycore
- Message streams for broadcasts
- Templates
- Delivery and bounce tracking
- Inbound email processing
- Webhooks for events
Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this
| Project | Covers | Stars | Commits, 12 weeks | Last release | Closed vs opened | Setup | License |
|---|---|---|---|---|---|---|---|
 useSendOpen source email sending platform with an SES dashboard, alternative to Resend |
Replaces it94% | 4.8k+22 | 7 days ago | 57% | Hosted, paid | AGPL-3.0 | |
Covers all 2 core jobs. Partly: Inbound email processing.See the evidence
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