Postmark
Postmark is a transactional email delivery service built for developers who need reliable, fast inbox placement.
Our verdict
Who it's for
Reliable, fast transactional email delivery for developers
Who should look elsewhere
Not designed for marketing or newsletter campaigns
Pros
- +Sub-second delivery times significantly faster than most competitors
- +Message streams separate transactional from promotional to protect deliverability
- +Premium support included on all plans at no extra cost
- +Generous free tier with 100 emails per month that never expires
- +Clean developer-focused API with SDKs for all major languages
Cons
- −Not designed for marketing or newsletter campaigns
- −Dedicated IPs require minimum 300,000 emails per month
- −Free plan limited to 100 emails which is very low for production use
- −Overage pricing can add up quickly at scale without pre-purchasing volume
- −No built-in drag-and-drop email builder for non-technical users
Key features
- ✓Transactional email delivery via REST API and SMTP
- ✓Separate message streams for transactional and promotional email
- ✓Built-in email templates with dynamic variables and layouts
- ✓Inbound email processing and parsing
- ✓Real-time webhooks for bounces, opens, clicks, and deliveries
- ✓Detailed delivery analytics and engagement tracking
- ✓DMARC monitoring and reporting per domain
- ✓Dedicated IP addresses for high-volume senders
- ✓Custom sending domains with DKIM and SPF authentication
- ✓Bulk email API for large-scale batch sending operations
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Free | $0 | month | 100 emails per month; No overages; Never expires |
| Basic | $15 | month | 10,000 emails per month; $1.80 per 1,000 overage emails; 45-day data retention |
| Pro | $16.5 | month | 10,000 emails per month; $1.30 per 1,000 overage emails; Customizable retention up to 365 days |
| Platform | $18 | month | 10,000 emails per month; $1.20 per 1,000 overage emails; Unlimited custom domains |