tinysend vs SMTPKit
SMTPKit is a low-cost transactional SMTP relay — cheap per-message sending and little else. If all you need is to push transactional email out at a low price, it does that. tinysend sends transactional email too, and adds receiving with a hosted inbox, newsletters and subscribers, and an agent-friendly API with auth.md self-signup.
SMTPKit is send-only and priced for it. tinysend is the layer above: receiving, newsletters, and agents.
| capability | smtpkit | tinysend |
|---|---|---|
| send transactional email | yes | yes |
| receive email + hosted inbox | no | yes |
| newsletters + subscribers | no | yes |
| open/click tracking | no | yes |
| REST API + webhooks | SMTP relay | yes |
| agent self-signup (auth.md) | no | yes |
Pick SMTPKit if you only need to push transactional email at the lowest possible per-message price and nothing else.
Pick tinysend if you need to receive mail, run newsletters, or give agents an API — not just a cheap send pipe.
SMTPKit is send-only. If you outgrow “just send,” tinysend adds receiving, newsletters, and agent access on top. See managing subscribers and custom domains.