Overview

Mailjet and Postmark take fundamentally different approaches. Mailjet is an all-in-one email platform combining transactional and marketing. Postmark is a transactional email specialist with industry-leading deliverability but no marketing features.

The Fundamental Difference

Mailjet: One platform for all email. Campaigns, automation, transactional, SMTP relay.

Postmark: Transactional only. Password resets, receipts, notifications. No marketing allowed.

This isn't a feature gap. It's a deliberate choice. Postmark's deliverability is exceptional because they don't allow bulk marketing email that can hurt IP reputation.

Deliverability

Postmark is famous for 99%+ inbox placement. They achieve this by:

• Only allowing transactional email
• Strict content policies
• Clean IP reputation
• Speed-optimized infrastructure

Mailjet has good deliverability but serves mixed traffic. Their deliverability is solid but not at Postmark's specialized level.

When Unified Makes Sense

If you need both marketing and transactional email, Mailjet gives you one platform, one integration, one price.

Using Postmark means adding a separate marketing tool. Mailchimp, ConvertKit, or similar. Two platforms, two integrations, two bills. More complexity.

Real-Time Collaboration

Mailjet's Passport editor allows multiple people to edit emails simultaneously. It's unique in the email space. Postmark doesn't need this since it's focused on transactional templates, not marketing design.

Pricing Reality

• Postmark: $15/10k emails for transactional only
• Mailjet: $17/15k emails for transactional + marketing

If you need both email types, Mailjet is the clear value. If you truly only need transactional, Postmark's specialization may justify the separate purchase.

For SaaS Companies

Both can work for SaaS, but with different tradeoffs. Postmark for mission-critical notifications. Mailjet for unified email.

If you're SaaS with Stripe billing, consider Sequenzy. We combine transactional and marketing with native Stripe integration for payment-triggered emails neither platform offers.

Making the Choice

Choose Mailjet for unified marketing + transactional at a good price. Choose Postmark for mission-critical transactional where deliverability is paramount. For SaaS with Stripe, consider Sequenzy.