Postmark vs SendGrid
as AI assistants see them, week of 2026-09-28
Postmark edges SendGrid in how AI assistants talk about transactional email. Postmark scores 63 overall (62 ChatGPT, 64 Claude, 65 Perplexity) and is named in 49 of 62 answers, versus SendGrid's 47 overall (44, 53, 44) and 45 of 62. Both show up in every answer for best transactional email APIs, best developer experience, webhooks for bounces and opens, deliverability, and Next.js or serverless apps. Head-to-head, Postmark is named more often in 6 questions, SendGrid in 3, with 11 ties. Neither is mentioned for testing and previewing emails before sending, and Postmark is also absent from the EU data hosting question.
Head to head
| metric | Postmark | SendGrid |
|---|---|---|
| score | 63 | 47 |
| questions won | 18 | 19 |
By assistant
Postmark
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 62 | 75% of answers | #2.4 |
| Claude | 64 | 85% of answers | #3.2 |
| Gemini | not sampled this week | ||
| Perplexity | 65 | 75% of answers | #2.1 |
SendGrid
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 44 | 65% of answers | #4.2 |
| Claude | 53 | 85% of answers | #5.1 |
| Gemini | not sampled this week | ||
| Perplexity | 44 | 65% of answers | #4.1 |
Where they differ
Only Postmark gets named for
nothing exclusive
Only SendGrid gets named for
- What's the best email API for a European company that needs EU data hosting?
More comparisons
- Postmark vs Resend
- Amazon SES vs Postmark
- Mailgun vs Postmark
- Brevo vs Postmark
- Mailgun vs SendGrid
- Amazon SES vs SendGrid
Not sold on either?
Scores count how often each assistant names a product, weighted by position. How the score works · Full Transactional email APIs leaderboard