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Best Email APIs for Developers
Transactional and marketing email services for developers. Compare features, pricing, and find the right tool for your project.
Quick Comparison
All Email APIs Tools
Resend
Email for developers
Resend is the best email API for React developers. The DX is unmatched and React Email makes templating a joy.
Best for:
React developersTransactional emailModern stacks
SendGrid
Email delivery at scale
SendGrid is the reliable choice for high-volume email. More features than competitors but the DX shows its age.
Best for:
High-volume sendersMarketing + transactionalEnterprise
Postmark
Transactional email that delivers
Postmark is the best for critical transactional emails where speed and deliverability matter most. No marketing bloat.
Best for:
Critical transactional emailPassword resetsNotifications
Mailgun
Powerful email APIs
Mailgun is powerful for advanced use cases like inbound processing and validation. Overkill for simple transactional email.
Best for:
Inbound email processingEmail validation needsComplex routing
Head-to-Head Comparisons
Guides for Email APIs
14 min read
Best Email API for Developers in 2026
Compare Resend, SendGrid, Postmark, and AWS SES for transactional email. Real pricing, deliverability, and developer experience breakdown.
12 min read
Resend vs SendGrid in 2026: Email APIs Compared
Resend is a modern email API with great DX, while SendGrid is a mature enterprise platform. Compare tradeoffs for SaaS teams.