Prompt
best email service for developers
Latest observation
If you mean email API/service for developers—password resets, verification emails, receipts, notifications, etc.—my 2026 shortlist is:
| Service | Best for | My take |
|---|---|---|
| Resend | Modern apps / startups | 🥇 Best overall developer experience |
| Postmark | Critical transactional email | 🥇 Best for deliverability |
| Amazon SES | High volume / low cost | 🥇 Best price at scale |
| SendGrid | Transactional + marketing | Best mature all-rounder |
| Mailgun | Advanced email infrastructure | Best API/tooling flexibility |
My recommendation
Pick Resend unless you have a specific reason not to. It has a clean API, strong TypeScript/React ecosystem, and is particularly well suited to modern web/SaaS applications. Current comparisons consistently put it at or near the top for developer experience. APIScout+1
Pick Postmark if email delivery is mission-critical—for example, authentication codes, password resets, billing receipts, or security alerts. Its product is deliberately focused on transactional email rather than mixing transactional and marketing traffic. Hack'celeration+1
Pick Amazon SES if you're sending hundreds of thousands or millions of emails and cost matters most. AWS's current Essentials pricing starts at $0.16 per 1,000 emails for the first 10M/month, with lower marginal rates at higher volumes, although you take on more infrastructure/deliverability work yourself. Amazon Web Services, Inc.+1
If I were starting a SaaS today
Next.js / TypeScript → Resend Rails/Python/Go/etc. → Resend or Postmark 100k+ emails/month → compare Resend/Postmark vs SES on actual volume 1M+ emails/month → seriously consider SES Marketing campaigns + transactional → SendGrid/Mailgun or a dedicated marketing platform
If you tell me your stack (e.g. Next.js, Python, Laravel), monthly email volume, and whether it's transactional or marketing, I can give you a single recommendation and estimated monthly cost.
Citations
- https://apiscout.dev/guides/best-email-apis-for-developers-2026
- https://apiscout.dev/guides/best-email-apis-2026
- https://www.hackceleration.com/labs/best/transactional-email-developers
- https://www.courier.com/blog/best-email-api-providers-for-developers
- https://aws.amazon.com/es/ses/pricing/
- https://aws.amazon.com/about-aws/whats-new/2026/07/amazon-ses-pricing-plans/
- https://aws.amazon.com/blogs/messaging-and-targeting/introducing-amazon-simple-email-service-ses-pricing-plans/
- https://meisa.io/blog/best-transactional-email-service
- https://coldletter.com/blog/transactional-email-api/
- https://resend.com/handbook/company/how-we-make-money
- https://stackbriefly.com/blog/transactional-email-apis-2026-resend-postmark-sendgrid-mailgun-amazon-ses
- https://dreamlit.ai/blog/best-email-api-providers
Observation history
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