Overview

Resend and Postmark are both laser-focused on transactional email, which makes them direct competitors. Postmark has been the deliverability champion since 2010, famously strict about who can use their service to protect their IP reputation. Resend launched in 2023 with a focus on modern developer experience.

Deliverability

Postmark's biggest advantage is deliverability. They're known for near-zero spam rates and sub-second delivery times. They achieve this by being selective about customers and separating transactional from broadcast emails. Resend has good deliverability but doesn't have Postmark's 14-year track record.

Developer Experience

Resend wins on modern DX. The React Email integration is excellent if you're building with React or Next.js. Postmark's API is clean and well-documented, but their Mustache templates feel dated compared to writing emails as React components.

Inbound Email

Postmark supports inbound email parsing, which is useful for things like reply processing or support ticket systems. Resend doesn't offer this feature.

Pricing

Postmark is slightly cheaper at low volumes ($15/mo for 10k emails vs Resend's $20/mo for 50k). However, Resend's free tier (3k emails) is more generous than Postmark's (100 emails). At higher volumes, pricing is comparable.