Postmark Plans Pricing
Postmark's four published tiers, priced by monthly email volume. Every tier except Free is metered: the listed price is the FLOOR at 10,000 emails/month and rises with the volume slider, with overages billed per 1,000 extra emails at a rate that gets cheaper as the tier gets more expensive.
Postmark Plans Pricing is the machine-readable pricing-plan profile for Postmark on the APIs.io network, conforming to the API Commons Plans specification.
It defines 4 plans, covering freemium and paid tiers, with named plans including Free, Basic, Pro, Platform.
Tagged areas include Email and Transactional.
Plans
Developer tier — 100 emails/month, never expires, no overages permitted.
- 100 emails/month, no expiry
- REST API and SMTP
- Sandbox Mode
- Unlimited emails/day
- Suitable for testing an integration and evaluating deliverability
For solo developers and smaller teams. $15.00/month at 10,000 emails.
- Industry-leading deliverability rates & speed
- 45-day data retention
- 5 custom sending domains
- Unlimited emails/day
- Detailed analytics and insights
For start-ups and small businesses. $16.50/month at 10,000 emails.
- Industry-leading deliverability rates & speed
- Customizable data retention up to 365 days (45-day default)
- 10 custom sending domains
- Unlimited emails/day
- Detailed analytics and insights
- Inbound email processing
- Eligible for the Dedicated IPs and Custom retention add-ons
For agencies and larger teams. $18.00/month at 10,000 emails.
- Industry-leading deliverability rates & speed
- Customizable data retention up to 365 days (45-day default)
- Unlimited custom sending domains
- Unlimited emails/day
- Detailed analytics and insights
- Inbound email processing
- Unlimited users, servers and message streams
Sources
Work with this as data
Every plan here is available over the APIs.io API and to AI agents over MCP.