How popular isMailgun?
In September 2026, people searched for Mailgun by name about 74,100 times worldwide, a 32.7% decrease from the previous year. These searches made up 12.2% of all global transactional email service searches, placing Mailgun third out of eight services. When we asked both ChatGPT and Google AI Overviews about transactional email services, Mailgun appeared in four of the five answers and was the fifth most recommended of the eight.
Mailgun is the third most searched of 8 competitors and the fifth most recommended in AI answers.
Twilio SendGridShare of searches 34.4%Mentioned in 3 of 5 AI answersPlace in AI recommendations 4th
PostmarkShare of searches 12.7%Mentioned in 5 of 5 AI answersPlace in AI recommendations 1st
MailgunShare of searches 12.2%Mentioned in 4 of 5 AI answersPlace in AI recommendations 5th
MailjetShare of searches 12.2%Mentioned in 0 of 5 AI answersPlace in AI recommendations –
ResendShare of searches 8.4%Mentioned in 4 of 5 AI answersPlace in AI recommendations 2nd
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Top transactional email services in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Mailgun was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Mailgun is the fifth most recommended of the eight.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
- Postmark1st
- Resend2nd
Amazon SES3rd- Twilio SendGrid4th
- Mailgun5th
- SMTP2GO6th
- Mailjet–
Mailtrap–
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
- Amazon SES5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Mailgun4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Resend4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Twilio SendGrid3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- SMTP2GO2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Mailjet0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Mailtrap0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about transactional email services
5 answers
Asked ChatGPT
“Which transactional email service should I use?”
Asked ChatGPT
“What are the best transactional email services?”
Asked ChatGPT
“What's the best transactional email service for app notifications?”
Searched Google, AI Overview
“transactional email service”
Searched Google, AI Overview
“email delivery service”
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Which transactional email services compete with Mailgun?
Share of searches by month for Twilio SendGrid, Postmark, Mailgun, Mailjet, Resend, Mailtrap, Amazon SES, SMTP2GO. 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 | SMTP2GO |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 41.7% | 8.5% | 14.8% | 14.8% | 2.3% | 8.1% | 4.4% | 5.4% |
| Nov 2025 | 38.5% | 9.6% | 16.7% | 13.7% | 2.8% | 7.5% | 5% | 6.1% |
| Dec 2025 | 39.7% | 12% | 14.2% | 11.6% | 3.3% | 7.8% | 5.2% | 6.3% |
| Jan 2026 | 36.3% | 11.1% | 15.8% | 12.9% | 4% | 7.1% | 5.8% | 7.1% |
| Feb 2026 | 37.5% | 11.4% | 16.3% | 10.9% | 4.6% | 7.3% | 6% | 6% |
| Mar 2026 | 39.7% | 9.9% | 14.1% | 11.6% | 5.5% | 7.8% | 5.2% | 6.3% |
| Apr 2026 | 36.4% | 11% | 15.7% | 10.5% | 6.1% | 8.7% | 5.8% | 5.8% |
| May 2026 | 39.2% | 11.8% | 14% | 9.3% | 6.7% | 7.7% | 5.1% | 6.2% |
| Jun 2026 | 38.3% | 11.6% | 13.7% | 11.2% | 6.7% | 7.5% | 5% | 6.1% |
| Jul 2026 | 33.5% | 12.3% | 14.5% | 9.7% | 9.1% | 8% | 6.5% | 6.5% |
| Aug 2026 | 35.9% | 13.3% | 12.7% | 8.5% | 8.7% | 7% | 6.9% | 6.9% |
| Sep 2026 | 34.4% | 12.7% | 12.2% | 12.2% | 8.4% | 6.7% | 6.7% | 6.7% |
| Rank | Brand | Share of searches | Estimated monthly branded searches | vs prior month | Share change |
|---|---|---|---|---|---|
| 1, held 1st | 34.4% | 209K | 0% | -1.4 points | |
| 2, held 2nd | 12.7% | 77.3K | 0% | -0.5 points | |
| 3, held 3rd | 12.2% | 74.1K | -0.04% | -0.5 points | |
| 4, moved from 5th to 4th | 12.2% | 74K | +49.5% | +3.7 pointsmoved from 5th to 4th | |
| 5, moved from 4th to 5th | 8.4% | 50.9K | +0.06% | -0.3 pointsmoved from 4th to 5th | |
| 6, held 6th | 6.7% | 40.8K | -0.1% | -0.3 points | |
| 7, held 7th | 6.7% | 40.5K | 0% | -0.3 points | |
| 8, held 8th | 6.7% | 40.5K | 0% | -0.3 points |
34.4%
Held 1st. 209K estimated branded searches, 0% vs prior month. Share -1.4 points.
2.
Postmark12.7%
Held 2nd. 77.3K estimated branded searches, 0% vs prior month. Share -0.5 points.
3.
Mailgun12.2%
Held 3rd. 74.1K estimated branded searches, -0.04% vs prior month. Share -0.5 points.
4.
Mailjet12.2%
Moved from 5th to 4th. 74K estimated branded searches, +49.5% vs prior month. Share +3.7 points.
5.
Resend8.4%
Moved from 4th to 5th. 50.9K estimated branded searches, +0.06% vs prior month. Share -0.3 points.
6.
Mailtrap6.7%
Held 6th. 40.8K estimated branded searches, -0.1% vs prior month. Share -0.3 points.
6.7%
Held 7th. 40.5K estimated branded searches, 0% vs prior month. Share -0.3 points.
8.SMTP2GO
6.7%
Held 8th. 40.5K estimated branded searches, 0% vs prior month. Share -0.3 points.
Compare popularity between Mailgun and its closest rivals
Every comparison with Mailgun
7 comparisons
How has branded search demand for Mailgun changed worldwide over the last 12 months?
4 findings
- Across the 12 months ending September 2026, estimated monthly branded searches for Mailgun worldwide fell from 110K to 74.1K.
- Across the 12 months ending September 2026, Mailgun’s share of searches among transactional email services worldwide decreased from 14.8% to 12.2%.
- Across the 12 months ending September 2026, Mailgun’s share of searches among transactional email services worldwide peaked at 16.7% in November 2025 and was lowest at 12.2% in September 2026.
- Across the 12 months ending September 2026, Mailgun fell from 2nd to 3rd among transactional email services worldwide.
How did search popularity change for transactional email services worldwide in September 2026?
6 changes
In September 2026, Mailjet overtook Resend to rank 4th among transactional email services worldwide, with 12.2% of the searches.
In September 2026, Twilio SendGrid lost share of searches among transactional email services worldwide, from 35.9% to 34.4%.
In September 2026, Postmark lost share of searches among transactional email services worldwide, from 13.3% to 12.7%.
In September 2026, Mailgun lost share of searches among transactional email services worldwide, from 12.7% to 12.2%.
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 Amazon SES worldwide rose 22.4% over 12 measured months, from 33.1K to 40.5K in September 2026.
How are Mailgun’s branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Mailgun’s name. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brand is growing, holding steady, or fading.
- mailgun
- mailgun email
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Where does Mailgun compete?
| Competitor set | Rank | Share of searches | Ranking |
|---|---|---|---|
| Transactional email services | 3rd of 8 | 12.2% | Shown above |
| Email API platforms | 3rd of 5 | 16.4% | Show ranking |
Is Mailgun your brand?
Put your own campaigns, spend and outcomes next to this demand line, so you can see which of your marketing lined up with the movements above.