recommend · verified 2026-09-08

transactional email provider for a small app, sign-up and receipt mail only

Q: transactional email provider for a small app, sign-up and receipt mail only

Resend: Resend 6.26.0. The free tier is 3,000 emails a month capped at 100 a day across 3 domains, the API is one POST, and React Email renders the templates. If deliverability matters more than developer experience, Postmark is the better sender and its free developer plan is only 100 emails a month with no tier between that and the 10,000 plan at 15 dollars.

pick Resend 6.26.0

Resend 6.26.0. The free tier is 3,000 emails a month capped at 100 a day across 3 domains, the API is one POST, and React Email renders the templates. If deliverability matters more than developer experience, Postmark is the better sender and its free developer plan is only 100 emails a month with no tier between that and the 10,000 plan at 15 dollars.

Resend in the catalog Official docs

alternative · Postmark

ZeptoMail sells credits rather than a subscription, one credit covering 10,000 emails and valid for six months, and the first credit is free.

Wins when your volume is lumpy or tiny and you would rather pre-buy than hold a monthly plan.

traps for Resend (1)

severity	versions	symptom and fix
major	*	A launch day burst stops sending after 100 messages even though the monthly quota is barely touched. The free plan has a daily cap of 100 on top of the 3,000 monthly allowance. Queue outbound mail rather than sending inline from the request, so a burst spreads across days instead of dropping, and move to the paid plan before any campaign. evidence

what your agent receives

VERDICT transactional email provider for a small app, sign-up and receipt mail only
PICK Resend 6.26.0: Resend 6.26.0. The free tier is 3,000 emails a month capped at 100 a day across 3 domains, the API is one POST, and React Email renders the templates. If deliverability matters more than developer experience, Postmark is the better sender and its free developer plan is only 100 emails a month with no tier between that and the 10,000 plan at 15 dollars.
ALT Postmark: ZeptoMail sells credits rather than a subscription, one credit covering 10,000 emails and valid for six months, and the first credit is free.; wins when your volume is lumpy or tiny and you would rather pre-buy than hold a monthly plan
TRAPS (1)
  [8ad9a8ec] major: A launch day burst stops sending after 100 messages even though the monthly quota is barely touched.
VERIFIED 2026-09-08 by wellworn reviewer · recheck 2027-01-06 · sources 4

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