Transactional email APIs · #8 of 16 · ↑ Mailtrap · ↓ Mailjet
MailerSend
MailerSend ranks #8 of 16 in transactional email apis in the week of 28 September 2026, with a visibility score of 10 across ChatGPT, Claude, Gemini and Perplexity. It was named in 17% of the answers we sampled.
sampled: 3 of 4 assistants this week
MailerSend shows up in 10 of 62 answers across AI assistants, landing an overall score of 10 out of 100. Claude rates it highest at 21, Perplexity gives it 11, and ChatGPT doesn't mention it at all, scoring 0. It gets named most often for budget-minded questions, appearing in 2 of 3 answers for "cheapest way to send transactional email at scale" and "best transactional email service for a startup." It fares worse elsewhere, never showing up for questions about webhooks, self-hosted servers, deliverability, serverless apps, or developer-focused picks.
this is mine claim it, free, forever. We also check whether ChatGPT and Claude can read mailersend.com.
Who's talking about you
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 0 | 0% of answers | |
| Claude | 21 | 35% of answers | #5.7 |
| Gemini | not sampled this week | ||
| Perplexity | 11 | 15% of answers | #3.7 |
Questions you win
| question | named in | best spot |
|---|---|---|
| What's the cheapest way to send transactional email at scale? | 2 of 3 | #2 |
| Which transactional email service is best for a startup? | 2 of 3 | #3 |
| What's the best transactional email provider for high volume at low cost? | 1 of 3 | #3 |
| Which email API has the best free tier? | 1 of 3 | #4 |
| What's the best alternative to SendGrid? | 1 of 3 | #6 |
| What's the best email API for a European company that needs EU data hosting? | 1 of 3 | #6 |
| What's the best email API in 2026? | 1 of 3 | #7 |
| 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 |
| Which email API has the best deliverability? | Postmark, Amazon SES, Mailtrap |
| What's the best SMTP service for an app? | Postmark, Resend, Amazon SES |
| Which transactional email provider has the best developer experience? | Resend, Postmark, SendGrid |
| 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 tool to test and preview emails before sending? | nobody in particular |
| What's the best email service for sending receipts and order confirmations? | Postmark, Resend, Amazon SES |
| What's the best email API with webhooks for bounces and opens? | Postmark, Resend, Mailgun |
| What's the best email API that also handles marketing campaigns? | SendGrid, Brevo |
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
- Claude“MailerSend — Lithuanian (MailerLite), developer-friendly, reasonable pricing.”
- Perplexity“MailerSend — good for startups that need affordable sending plus collaborative template management.”
- Claude“| MailerSend | ~$24/mo for 50k | Cheap with a real UI and templating |”
Closest rivals
- MailerSend vs Mailjet9
- MailerSend vs Mailtrap13
- MailerSend vs Postal7
- MailerSend vs Elastic Email5
- MailerSend vs Loops4
All MailerSend alternatives · Full Transactional email APIs leaderboard · Sources