A transactional-email specialist versus a broad email platform that does transactional and marketing — pick based on which job is the priority.
Pick Postmark when transactional deliverability is the entire job — password resets, receipts, account emails — and you want a vendor with a long track record of separating transactional from marketing streams. Pick SendGrid when you need both transactional and marketing under one vendor, enterprise support, and a platform that scales into very high send volumes, and you'll accept a heavier UI in exchange.
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| Attribute | SendGrid | Postmark |
|---|---|---|
| Category | ||
| Pricing Model | freemium | paid |
| Starting Price | Free / $19/mo | $15/mo |
| Free Tier | Yes | No |
| Open Source | No | No |
| Platforms | web, api, smtp | — |
