I need a simple email API and good docs. What are my options?

If you want a simple email API with good documentation, your best options usually fall into two buckets:

1. Transactional email services — for app emails like password resets, receipts, alerts
2. Marketing email services — for newsletters, campaigns, list management

For most “simple API + good docs” needs, these are strong choices:

Best simple email APIs

1. SendGrid

• Good for: transactional + marketing
• Why choose it: very widely used, lots of examples, decent docs, easy API
• Pros: mature platform, SDKs, templates, webhooks, good deliverability
• Cons: docs can feel a bit broad because the product is large

2. Mailgun

• Good for: transactional email
• Why choose it: clean API, developer-focused, strong docs
• Pros: easy sending, logs, routing, webhooks, good for engineers
• Cons: UI is not as polished as some competitors

3. Postmark

• Good for: transactional email only
• Why choose it: extremely simple, excellent docs, very easy to get started
• Pros: great developer experience, high deliverability, clear API
• Cons: not meant for bulk marketing campaigns

4. Resend

• Good for: modern app email, especially with React/Next.js
• Why choose it: very simple API, strong DX, modern docs
• Pros: easy setup, nice developer experience, good for product emails
• Cons: newer than the others, fewer advanced enterprise features

5. Amazon SES

• Good for: low-cost high-volume email
• Why choose it: cheap and scalable
• Pros: cost-effective, reliable
• Cons: docs and setup are more complex; not the best if you want “simple”

If you want the easiest choice

• Postmark if you only need transactional email
• Resend if you want a modern, simple API
• SendGrid if you want a more all-in-one platform

Quick recommendation by use case

• Password resets / receipts / alerts: Postmark or Resend
• Transactional + some marketing: SendGrid or Mailgun
• Lowest cost at scale: Amazon SES
• Best docs + simplest developer experience: Postmark or Resend

If you want, I can also give you:

• a comparison table
• recommendations based on your stack (Node, Python, PHP, etc.)
• or a top 3 shortlist based on your budget and feature needs