Postmark Pricing (2026)
Transactional email with exceptional deliverability, now by ActiveCampaign. Volume-based pricing. Overage rates decrease on higher plans. High-volume custom pricing available..
Prices verified March 2026
Starting price
$15/mo
Free plan
Yes
100 emails/month, never expires, test integration and side projects
Plans
4
Free tier included
Pricing Analysis
Postmark starts at $15/mo, which is in line with other transactional email services (average ~$13/mo). The free plan (100 emails/month, never expires, test integration and side projects) lets you test the platform before committing. It's a reasonable starting point for very small lists, though you'll likely outgrow it once your subscriber count passes the limit.
Free
Up to 100 subscribers
- ✓ 100 emails/month
- ✓ Industry-leading deliverability
- ✓ Full API access
- ✓ Never expires
- ✓ Perfect for testing and side projects
Best for: testing Postmark or lists under 100.
Basic
Up to 10,000 subscribers
- ✓ 10,000 emails/month
- ✓ Overage at $1.80/1,000 emails
- ✓ 45-day data retention
- ✓ 5 custom sending domains
- ✓ Unlimited emails/day
- ✓ Detailed analytics
Best for: growing businesses with up to 10,000 subscribers.
Pro
Up to 10,000 subscribers
- ✓ 10,000 emails/month
- ✓ Overage at $1.30/1,000 emails
- ✓ Customizable retention up to 365 days
- ✓ 10 custom sending domains
- ✓ Unlimited emails/day
- ✓ Inbound email processing
Best for: scaling businesses that need more capacity.
Platform
Up to 10,000 subscribers
- ✓ 10,000 emails/month
- ✓ Overage at $1.20/1,000 emails
- ✓ Customizable retention up to 365 days
- ✓ Unlimited custom sending domains
- ✓ Unlimited emails/day
- ✓ Inbound email processing
Best for: agencies, large lists, and teams needing advanced features.
Prices shown are for the base subscriber count. Cost scales as your list grows.
Free plan available — no credit card required
What's Included in Each Plan
| Feature | Free | Basic | Pro | Platform |
|---|---|---|---|---|
| Price | Free | $15/mo | $16.5/mo | $18/mo |
| Subscribers | 100 | 10,000 | 10,000 | 10,000 |
Feature availability may vary. Check Postmark's website for the latest plan details.
Compare Postmark Pricing to Alternatives
| Tool | Free Plan | Starts At | Rating |
|---|---|---|---|
| Postmark (this tool) | Yes | $15/mo | 4.6/5 |
| Amazon SES | Yes | Usage-based | 4.4/5 |
| Plunk | Yes | $1/mo -$14 | 3.7/5 |
| Mailtrap | Yes | $15/mo | 4.8/5 |
| Mailgun | Yes | $15/mo | 4.2/5 |
| Elastic Email | Yes | $19/mo | 4.4/5 |
| Resend | Yes | $20/mo | 4.2/5 |