Transactional email APIs · #7 of 16 · ↑ Brevo · ↓ MailerSend
Mailtrap
Mailtrap ranks #7 of 16 in transactional email apis in the week of 28 September 2026, with a visibility score of 13 across ChatGPT, Claude, Gemini and Perplexity. It was named in 18% of the answers we sampled.
sampled: 3 of 4 assistants this week
Mailtrap shows up in 11 of 62 answers across Transactional email APIs questions, landing an overall score of 13 out of 100. Perplexity rates it highest at 28, with ChatGPT at 7 and Claude at 3. Its strongest showing is on testing and previewing emails before sending, where it's named in all 3 answers, and it also appears in 2 of 3 answers about free tiers. It shows up less for webhooks and deliverability questions, and isn't mentioned at all for high-volume, low-cost, self-hosted, Next.js, or general developer-focused email API questions.
this is mine claim it, free, forever. We also check whether ChatGPT and Claude can read mailtrap.io.
Who's talking about you
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 7 | 10% of answers | #4.0 |
| Claude | 3 | 5% of answers | #5.0 |
| Gemini | not sampled this week | ||
| Perplexity | 28 | 40% of answers | #4.0 |
Questions you win
| question | named in | best spot |
|---|---|---|
| What's the best tool to test and preview emails before sending? | 3 of 3 | #4 |
| Which email API has the best free tier? | 2 of 3 | #4 |
| Which email API has the best deliverability? | 1 of 3 | #2 |
| What's the best email service for sending receipts and order confirmations? | 1 of 3 | #2 |
| What's the best SMTP service for an app? | 1 of 3 | #4 |
| What's the best email API with webhooks for bounces and opens? | 1 of 3 | #4 |
| Which transactional email provider has the best developer experience? | 1 of 4 | #3 |
| What are the best transactional email APIs? | 1 of 4 | #7 |
Questions you lose
| question | who got named instead |
|---|---|
| What's the best email API for developers? | Resend, Postmark, Mailgun |
| What's the best alternative to SendGrid? | Postmark, Amazon SES, Resend |
| What's the cheapest way to send transactional email at scale? | Amazon SES, MailerSend, Elastic Email |
| Which transactional email service is best for a startup? | Postmark, Resend, Amazon SES |
| What's the best email API in 2026? | Resend, Postmark, Amazon SES |
| What's the best way to send password reset and verification emails from my app? | Postmark, Amazon SES, Resend |
| What's the best email API for a Next.js or serverless app? | Resend, Postmark, SendGrid |
| What's the best email API with React or JSX email templates? | Resend, Postmark |
| What's the best open-source or self-hosted transactional email server? | Postal |
| What's the best transactional email provider for high volume at low cost? | Amazon SES, Resend, Elastic Email |
| What's the best email API that also handles marketing campaigns? | SendGrid, Brevo |
| What's the best email API for a European company that needs EU data hosting? | Brevo, Mailgun, Mailjet |
Assistants cited 10 pages for questions in this category that name your rivals and not you. Claim to see them. See all sources for Transactional email APIs.
In their words
- ChatGPT“Mailtrap — best for developers/transactional emails”
- Claude“Mailtrap — hosted version of the same idea, less setup, free tier available.”
- Perplexity“| Mailtrap | Testing plus production email | Delivered, opened, bounced, and other events, with webhook retry support |”
Closest rivals
- Mailtrap vs MailerSend10
- Mailtrap vs Mailjet9
- Mailtrap vs Postal7
- Mailtrap vs Elastic Email5
- Mailtrap vs Loops4
All Mailtrap alternatives · Full Transactional email APIs leaderboard · Sources