Prompt
email API for SaaS
Latest observation
Sep 24, 2026
OpenAI APIWeb search: off
If you mean “an email API I can plug into a SaaS product,” the usual choices are:
- SendGrid — popular, easy to integrate, good deliverability tools
- Mailgun — developer-friendly, good for transactional email
- Postmark — excellent for transactional emails, very reliable
- Amazon SES — cheapest at scale, more setup complexity
- Resend — modern API, great DX, especially for app emails
A typical SaaS email API should support:
- Transactional emails: signups, password resets, alerts
- Template management
- Deliverability tools: SPF, DKIM, DMARC
- Webhooks: delivered, bounced, opened, clicked
- Suppression lists: unsubscribes, complaints
- Multi-tenant support if you send email on behalf of your customers
- Rate limiting and retries
If you want, I can also give you:
- a side-by-side comparison of the best email APIs for SaaS, or
- a sample implementation in Node.js, Python, or PHP.