Overview
Loops and Postmark serve different parts of the email stack. Loops is a marketing automation platform for SaaS. Postmark is a transactional email delivery service obsessed with speed and deliverability. They're not really competitors - many SaaS companies use both.
Different Problems, Different Tools
This comparison is like comparing a CRM to a payment processor. Loops handles marketing email - onboarding sequences, newsletters, behavioral triggers, campaigns. Postmark handles transactional email - password resets, receipts, notifications. One sends emails you plan, the other delivers emails your product generates.
Postmark's Deliverability Edge
Postmark is laser-focused on transactional email deliverability. They actively refuse marketing email to protect their sending reputation. The result: industry-leading delivery speeds (often under 10 seconds) and exceptional inbox placement. For critical transactional messages, Postmark sets the standard.
Loops' Marketing Strengths
Loops has everything Postmark lacks for marketing. Visual automation workflows, subscriber management, A/B testing, campaign analytics. If you need to send newsletters, build onboarding sequences, or run behavioral campaigns, Loops covers it. Postmark offers none of this.
The Pricing Comparison
Loops charges per contact with unlimited sends starting at $49/month. Postmark charges per email starting at $15/month for 10k emails. For marketing where you email contacts repeatedly, Loops' unlimited model offers predictability. For transactional where volume varies, Postmark's per-email pricing scales with actual usage.
The Stack Decision
Many SaaS teams run both: Loops for marketing, Postmark for transactional. This gives you best-in-class capabilities for each. But it means two integrations, two vendors, and split analytics. For a simpler stack, Sequenzy unifies both in one platform with native Stripe integration.
Making the Choice
Choose Loops for: marketing automation, onboarding sequences, newsletters. Choose Postmark for: critical transactional delivery, inbound email processing, exceptional deliverability. For unified marketing + transactional with Stripe billing integration, consider Sequenzy.