Resend is an email API for developers: it sends your app's transactional emails, such as sign-up confirmations, password resets and receipts. It's for founders building a SaaS or app who want sending set up quickly. The free plan sends 3,000 emails a month with a limit of 100 a day, on up to 3 domains, with SMTP, SDKs and React Email for building templates in code. Pro is $20 a month.
What it can do for you
Wire up your app's emails in an afternoon, design them as React components, and see delivery and opens in a clean dashboard. Scheduled and batch sending, inbound email and webhooks are included. For an early app, the free plan covers launch-day volumes.
What people like
Reviewers consistently praise the developer experience: clean docs, good SDKs and React Email. It's become a popular default for new SaaS projects.
The honest downsides
- 100 a day on free. Sending pauses when you hit the cap rather than billing you, which is safe for your wallet but not for a busy launch day.
- Delivery delays. Resend's own incident report describes delays of around two hours on 15 February 2026, and reviewers flag latency as a recurring issue.
- Less mature deliverability tooling. Reviewers say it trails Postmark here.
- 30-day data retention on free.
Skip it if
- you need newsletters or marketing email (use a marketing tool)
- login codes must arrive instantly every time and you can't test first
Alternatives
There's nothing we list that's better for developer experience.
- Postmark is the pick when deliverability of critical emails matters most; its free tier is for testing only.
Some links may be affiliate links. They help keep WebTools.directory running at no extra cost to you.
Comments