tinysend vs Postmark
Postmark is a transactional-email specialist with a strong deliverability reputation, message streams, and inbound parsing that posts incoming mail to a webhook. tinysend sends transactional email too, and adds a hosted inbox so replies land somewhere you can read and search — not just a webhook you have to build against — plus newsletters, subscribers, and agent self-signup.
Both are solid for sending. The difference is what happens around the send.
| capability | postmark | tinysend |
|---|---|---|
| send transactional email | yes | yes |
| inbound email | webhook only | hosted inbox + webhook |
| newsletters + subscribers | no | yes |
| public archive + RSS | no | yes |
| open/click tracking | yes | yes |
| custom domains | yes | yes |
| REST API | yes | yes |
| agent self-signup (auth.md) | manual key only | yes |
Pick Postmark if you want a focused, battle-tested transactional service with message streams and great deliverability, and you are happy handling inbound mail in a webhook.
Pick tinysend if you want replies to land in a real inbox, want newsletters and subscribers alongside transactional email, or want an agent to register and send on its own.
Plenty of people use both: Postmark for high-stakes transactional mail, tinysend for the newsletter, the inbox, and agent sends. See managing subscribers and custom domains.