Mailgun vs Postmark

Focused on transactional email delivery with similar API features

Which to pick

Transactional email delivery and validation
Email API with tracking
Integrations with HTTP API, Webhooks or Email template builder (on Mailgun's list, not Postmark's)

Mailgun: Offers email sending, receiving and tracking with a different pricing model and no message-stream separation.

What it is: Mailgun:Mailgun provides APIs for sending, receiving, validating and tracking transactional emails.; Postmark:Postmark is an email delivery service for sending transactional and marketing emails via API or SMTP.
Best for: Mailgun:Transactional email delivery and validation; Postmark:Fast, reliable transactional email
Who it’s for: Mailgun:Developers building email-enabled applications and services.; Postmark:Developers and teams needing reliable email delivery.
Pricing: Mailgun:Freemium; Postmark:Freemium
Plans: Mailgun:Free $0/mo · Basic $15/mo per month · Foundation $35/mo per month · Scale $90/mo per month; Postmark:Free $0.00/mo · Basic $15.00/mo per month · Pro $16.50/mo per month · Platform $18.00/mo per month
Works with: Mailgun:HTTP API, SMTP, Webhooks, Email template builder; Postmark:Python, Ruby, PHP, cURL, SMTP

RESTful Email API & SMTP relay. Send emails via HTTP API or SMTP with high reliability.
Email validation service. Real-time API and bulk upload to remove invalid addresses.
Analytics, tracking & webhooks. Detailed delivery, open, click data and event webhooks.
Inbox preview & accessibility checks. Preview emails before sending to ensure compliance and deliverability.
Dedicated IPs & IP pools. Control reputation with dedicated IPs, included in higher plans.
SAML SSO & multi-user access. Enterprise-grade security and role-based access control.
Log and message retention. Retention up to 30 days for logs and up to 7 days for messages.
Email template builder. Create and manage reusable email templates via API.

Industry-leading deliverability. Ensures emails reach inboxes quickly with vetted IPs and strict spam controls.
Message Streams. Separates transactional and marketing emails on parallel infrastructures.
Inbound email processing. Converts inbound emails to JSON and forwards via webhooks.
Detailed analytics. Provides bounce data, open/link tracking, and activity retention.
Official SDKs. Libraries for many languages (Node, Python, Ruby, PHP, .NET, etc.) for easy integration.
Sandbox mode. Test email sending without affecting real recipients.

Is Mailgun or Postmark free?+

Mailgun has a free plan; paid plans start at $15/month (Basic). Postmark has a free plan; paid plans start at $15/month (Basic).

Which is cheaper, Mailgun or Postmark?+

They start at the same price: Mailgun's Basic plan ($15/month) and Postmark's Basic plan ($15/month) cost the same.

Do Mailgun and Postmark integrate with the same tools?+

Partly. Both list SMTP. Mailgun also lists HTTP API, Webhooks and Email template builder; Postmark also lists Python, Ruby, PHP and cURL.

Mailgun

Listed by DevHunt

Postmark

Listed by DevHunt

Based on each tool's website and DevHunt data. Details may change; check the official sites.