Mailtrap vs Resend:Which is more popular?
In September 2026, Resend had more branded searches than Mailtrap among email API platforms worldwide. Resend had about 50,900 branded searches, while Mailtrap had 40,800. Resend made up 8.8% of all email API platform searches we track, and Mailtrap accounted for 7.1%. When we asked ChatGPT and Google AI Overviews about email API platforms, Resend appeared in four of the five answers and Mailtrap in one. Resend was mentioned before Mailtrap in every answer that named either.
Who do people search for more?
Resend, about 25% more searches than Mailtrap
Who does AI mention more?
Resend, mentioned in 4 of 5 answers, Mailtrap in 1
Who does AI recommend more?
Resend, named ahead of Mailtrap in 4 of 4 answers
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Top email API platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Resend was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Mailtrap was mentioned in one out of five: not in any of the three ChatGPT answers, but in one of the two Google AI Overviews. Resend was listed before Mailtrap in every answer that named either.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Postmark1st- Resend2nd
Amazon SES3rd
Mailgun4th
Twilio SendGrid5th
Mailtrap6th
Mailjet–
MailerSend–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Postmark5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Mailgun4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Resend4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Amazon SES4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Twilio SendGrid3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Mailtrap1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Mailjet0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- MailerSend0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about email API platforms
5 answers
Asked ChatGPT
“Which email API platform should I use?”
Asked ChatGPT
“What are the best email API platforms?”
Asked ChatGPT
“What's the best email API platform for transactional email?”
Searched Google, AI Overview
“best email api”
Searched Google, AI Overview
“transactional email api”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.
Is Mailtrap or Resend more popular in search?
This chart shows how often people search Google for Mailtrap and Resend by name. Each line represents a brand's share of searches for all eight email API platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for Resend, Mailtrap. The figures are in the table below the chart.
View monthly share of searches table
| Month | Twilio SendGrid | Postmark | Mailgun | Mailjet | Resend | Mailtrap | Amazon SES | MailerSend |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 43.2% | 8.8% | 15.3% | 15.3% | 2.4% | 8.4% | 4.6% | 2.1% |
| Nov 2025 | 40.1% | 10% | 17.4% | 14.3% | 2.9% | 7.8% | 5.2% | 2.3% |
| Dec 2025 | 41.6% | 12.5% | 14.8% | 12.1% | 3.4% | 8.1% | 5.4% | 2% |
| Jan 2026 | 38.2% | 11.7% | 16.6% | 13.6% | 4.2% | 7.5% | 6.1% | 2.2% |
| Feb 2026 | 39.1% | 11.9% | 17% | 11.4% | 4.8% | 7.7% | 6.2% | 1.9% |
| Mar 2026 | 41.7% | 10.4% | 14.8% | 12.1% | 5.8% | 8.1% | 5.4% | 1.6% |
| Apr 2026 | 38% | 11.5% | 16.4% | 11% | 6.4% | 9% | 6% | 1.8% |
| May 2026 | 41.1% | 12.4% | 14.7% | 9.8% | 7% | 8% | 5.4% | 1.6% |
| Jun 2026 | 40.2% | 12.1% | 14.3% | 11.7% | 7% | 7.9% | 5.2% | 1.6% |
| Jul 2026 | 35.2% | 12.9% | 15.3% | 10.2% | 9.6% | 8.4% | 6.8% | 1.7% |
| Aug 2026 | 37.9% | 14% | 13.4% | 9% | 9.2% | 7.4% | 7.3% | 1.8% |
| Sep 2026 | 36.3% | 13.4% | 12.9% | 12.8% | 8.8% | 7.1% | 7% | 1.7% |
How has the Mailtrap and Resend comparison changed over the last 12 months?
3 findings
- The lead changed hands once in the 12 months ending September 2026: Resend took it in July 2026.
- Across the 12 months ending September 2026, Mailtrap’s share of searches among email API platforms worldwide moved from 8.4% to 7.1%, and its estimated monthly branded searches moved from 60.6K to 40.8K.
- Across the 12 months ending September 2026, Resend’s share of searches among email API platforms worldwide moved from 2.4% to 8.8%, and its estimated monthly branded searches moved from 17K to 50.9K.
How did search popularity change for email API platforms worldwide in September 2026?
3 changes
In September 2026, Mailjet overtook Resend to rank 4th among email API platforms worldwide, with 12.8% of the searches.
Estimated monthly branded searches for Resend worldwide rose 200.4% over 12 measured months, from 17K to 50.9K in September 2026.
Estimated monthly branded searches for Mailtrap worldwide fell 32.7% over 12 measured months, from 60.6K to 40.8K in September 2026.
How are branded searches counted?
6 search terms
Brandwave collects information about searches that people make online using Mailtrap’s and Resend’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Other head-to-heads among email API platforms
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