Postmark
Fast, high-deliverability transactional email service for web applications
pricingfree tierapichecked 22 Aug 2026
What Postmark is
Postmark specializes in fast, reliable delivery of transactional emails such as password resets, receipts, and user notifications. By physically separating transactional and promotional email sending streams, Postmark maintains pristine sender reputations, providing developers with lightning-fast delivery speeds and 45 days of searchable message history for troubleshooting.
Pricing
| Plan | Price | Annual | What you get |
|---|---|---|---|
| Developer | Free | — | 100 free test emails/mo, full REST API, webhooks, 45 days history |
| 10k Sends | $15/mo | — | 10,000 emails/mo, 45 days full content retention, inbound processing |
| 50k Sends | $55/mo | — | 50,000 emails/mo, full analytics, subaccounts, dedicated deliverability |
| 125k Sends | $115/mo | — | 125,000 emails/mo, dedicated IP add-on available, priority support |
Part of ActiveCampaign; focuses strictly on rapid transactional delivery.
Free access: Free developer account with 100 monthly test emails
read from the vendor pricing page · 22 Aug 2026 · how we verify
Best for
- SaaS application developers requiring sub-second transactional delivery
- Product teams needing comprehensive 45-day email event troubleshooting logs
Not for
- Scraped cold outbound sales email campaigns
Integrations
Postmark alternatives
All 4 alternatives to Postmark, compared Get the Toolvern badge for Postmark
Mailgun by Sinch Developer-first transactional email API and deliverability service 
Twilio SendGrid Cloud-based transactional and marketing email delivery infrastructure 
MailerSend Transactional email and SMS messaging service for developers 
Mailhardener Email domain security, DMARC, DKIM, and SPF validation suite Head to head: Postmark vs Mailgun by Sinch Postmark vs Twilio SendGrid Postmark vs MailerSend Postmark vs Mailhardener
Compiled by Stepan Noianov from the vendor's own site and pricing page. Something wrong? Report an inaccuracy.