The email API for developers
Send transactional and marketing emails at scale. Lower cost than the major email APIs. Built for reliability and developer experience.
curl -X POST https://api.poststack.dev/api/emails \
-H "Authorization: Bearer sk_live_..." \
-H "Content-Type: application/json" \
-d '{
"from": "hello@yourdomain.com",
"to": "user@example.com",
"subject": "Welcome aboard!",
"html": "<h1>Welcome!</h1>"
}'Everything you need to send email
Built so you can focus on your product, not your email infrastructure
Developer Friendly
Clean REST API with TypeScript SDK and guides for popular languages. Webhooks for real-time events. Get started in minutes.
Deliverability
Automated SPF, DKIM, and DMARC setup. Bounce and complaint handling. Domain reputation monitoring.
Analytics
Real-time open and click tracking. Delivery metrics, engagement reports, and webhook event streams.
Templates
React Email support. Variable substitution with Handlebars syntax. Version history and previews.
Contacts
Audience management with segments. Broadcast campaigns with scheduling. Unsubscribe handling.
Affordable
Pay less than industry standard rates. Generous free tier with 3,000 emails per month. No hidden fees.
Simple, transparent pricing
Start free and scale as you grow. No surprises on your bill.
Free
Perfect for getting started
- 3,000 emails/month
- 1 domain
- 2 API keys
- 7-day log retention
- Email support
Pro
For growing businesses
- 50,000 emails/month
- 10 domains
- 50 API keys
- 30-day log retention
- Webhooks
- Email support