Every side project needs a reliable way to send auth emails, password resets, and notifications. If you’re looking for a service with a solid developer experience and a generous free plan, here are the best options:
Resend
The modern favorite for many developers. It has a fantastic API, excellent documentation, and first-class support for React Email.
Free Tier: 3,000 emails/month (100/day limit).Postmark
Known for having some of the best deliverability rates in the industry. It’s a "developer-first" platform that strictly separates transactional and marketing streams.
Free Tier: 100 emails/month (no expiration, no credit card).Mailjet
A solid choice if you need a higher monthly volume for a small user base.
Free Tier: 6,000 emails/month (200/day limit).MailerSend
Built by the team behind MailerLite, this is a highly intuitive transactional service with a focus on simplicity.
Free Tier: 500 emails/month (100/day limit).SendGrid
The industry standard. While the free tier is modest, it’s a great way to learn the platform that many enterprise companies use.
Free Tier: 100 emails/day.Mailgun
A powerful engine for teams that need deep tracking and complex routing.
Free Tier: 100 emails/day.
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