head to head
Postmark vs SendGrid
Transactional purist versus all-in-one veteran.
Side by side
| Feature | Postmark | SendGrid |
|---|---|---|
| Tagline | Transactional-only, fast and well-delivered. | Twilio-owned veteran with broad SDK coverage. |
| Free tier | 100/mo developer plan | 60-day free trial only (permanent free tier was removed May 2025) |
| Starts at | $15/mo for 10,000 emails | $19.95/mo for 50,000 emails |
| Pricing model | tiered | tiered |
| API | Yes | Yes |
| SMTP | Yes | Yes |
| SDKs | node, python, go, ruby, php, java, elixir, rust, dotnet | node, python, go, ruby, php, java, dotnet |
| Templates | rich | rich |
| React Email | No | No |
| Webhooks | Yes | Yes |
| Inbound | Yes | Yes |
| Multi-tenant | Yes | Yes |
| Idempotency | No | No |
| Dedicated IP | Yes | Yes |
| Deliverability | Independent tests regularly place Postmark in the top tier for inbox placement and median delivery time. Separate streams for transactional vs broadcast protect sender reputation. | Solid but not exceptional. Independent tests typically place SendGrid behind Postmark and SMTP2GO on inbox placement. The shared-IP pool is large and reputation can swing. |
| DX score | 9/10 | 6/10 |
| Best for | Teams where password resets, receipts, and magic links absolutely cannot miss the inbox. | Enterprises that want a single Twilio-backed vendor for email and SMS. |
Postmark
pros
- ›Top-tier deliverability with median delivery under 10 seconds
- ›Streams cleanly separate transactional and broadcast
- ›Free DMARC monitoring product (dmarc.postmarkapp.com)
- ›Retains full message content and metadata for 45 days for debugging
cons
- ›No idempotency keys
- ›Pricing per email is higher than SES, Mailgun, or SMTP2GO
- ›No drag-and-drop template builder
- ›Marketing automation is intentionally absent
SendGrid
pros
- ›Mature, broad SDK coverage
- ›Twilio backing means long-term operational stability
- ›Marketing platform alongside transactional
- ›Inbound parse webhook is well-documented
cons
- ›Removed the permanent free tier in May 2025
- ›No idempotency keys
- ›No API request logs for debugging
- ›Pricing climbs steeply across plan tiers; many features gated to higher SKUs
- ›Legacy v3 API patterns feel dated next to Resend or MailerSend