---
title: "Transactional email services: Which are searched most?"
description: "Compare the transactional email services people choose between. Share of Search among Twilio SendGrid, Postmark, Mailgun, Mailjet, Resend, Mailtrap, Amazon SES and SMTP2GO, the transactional email services Brandwave compares worldwide, using the same methodology, market, and reporting period. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time."
canonical: "https://gobrandwave.com/demand/global-en/categories/transactional-email-services"
publisher: "Brandwave"
---

# Transactional email services: Which are searched most?

Compare the transactional email services people choose between. Share of Search among Twilio SendGrid, Postmark, Mailgun, Mailjet, Resend, Mailtrap, Amazon SES and SMTP2GO, the transactional email services Brandwave compares worldwide, using the same methodology, market, and reporting period. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.

## Key facts

- **Competitive set**: Transactional email services
- **Market**: Global
- **Brands compared**: 8
- **Month measured**: Sep 2026
- **Highest Share of Search**: Twilio SendGrid, 34.4%

## Which brand is most popular in search among transactional email services worldwide?

- In September 2026, Twilio SendGrid was the most searched among transactional email services worldwide, with an estimated 209K branded searches, 34.4% of all searches for the eight we track.
- Postmark is in 2nd place, 21.7 percentage points behind at 12.7%.
- Across the 12 months ending September 2026, Twilio SendGrid’s share of searches among transactional email services worldwide decreased from 41.7% to 34.4%.
- Across the 12 months ending September 2026, Postmark’s share of searches among transactional email services worldwide increased from 8.5% to 12.7%.
- 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, Mailjet’s share of searches among transactional email services worldwide decreased from 14.8% to 12.2%.
- Across the 12 months ending September 2026, Resend’s share of searches among transactional email services worldwide increased from 2.3% to 8.4%.
- Across the 12 months ending September 2026, Mailtrap’s share of searches among transactional email services worldwide decreased from 8.1% to 6.7%.
- Across the 12 months ending September 2026, Amazon SES’s share of searches among transactional email services worldwide increased from 4.4% to 6.7%.
- Across the 12 months ending September 2026, SMTP2GO’s share of searches among transactional email services worldwide increased from 5.4% to 6.7%.
- Across the 12 months ending September 2026, Twilio SendGrid’s share of searches among transactional email services worldwide peaked at 41.7% in October 2025 and was lowest at 33.5% in July 2026.
- Across the 12 months ending September 2026, Postmark’s share of searches among transactional email services worldwide peaked at 13.3% in August 2026 and was lowest at 8.5% in October 2025.
- 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, Mailjet’s share of searches among transactional email services worldwide peaked at 14.8% in October 2025 and was lowest at 8.5% in August 2026.
- Across the 12 months ending September 2026, Resend’s share of searches among transactional email services worldwide peaked at 9.1% in July 2026 and was lowest at 2.3% in October 2025.
- Across the 12 months ending September 2026, Mailtrap’s share of searches among transactional email services worldwide peaked at 8.7% in April 2026 and was lowest at 6.7% in September 2026.
- Across the 12 months ending September 2026, Amazon SES’s share of searches among transactional email services worldwide peaked at 6.9% in August 2026 and was lowest at 4.4% in October 2025.
- Across the 12 months ending September 2026, SMTP2GO’s share of searches among transactional email services worldwide peaked at 7.1% in January 2026 and was lowest at 5.4% in October 2025.
- Across the 12 months ending September 2026, Postmark rose from 4th to 2nd among transactional email services worldwide.
- Across the 12 months ending September 2026, Mailgun fell from 2nd to 3rd among transactional email services worldwide.
- Across the 12 months ending September 2026, Mailjet fell from 3rd to 4th among transactional email services worldwide.
- Across the 12 months ending September 2026, Resend rose from 8th to 5th among transactional email services worldwide.
- Across the 12 months ending September 2026, Mailtrap fell from 5th to 6th among transactional email services worldwide.
- Across the 12 months ending September 2026, SMTP2GO fell from 6th to 8th among transactional email services worldwide.

## Top transactional email services in ChatGPT and Google AI Overviews

In Brandwave's three ChatGPT questions and two Google AI Overviews, Postmark and Amazon SES appeared every time. Postmark was recommended most often, coming first in one out of five answers. Resend was second, and Amazon SES was third. Mailjet, which ranked fourth in searches, was not mentioned at all.

Brands get a higher AI rank if they are mentioned earlier in the answers that list options.

| Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it |
| --- | --- | --- | --- | --- |
| Postmark | 1st | 3 of 3 | 2 of 2 | 5 of 5 |
| Resend | 2nd | 3 of 3 | 1 of 2 | 4 of 5 |
| Amazon SES | 3rd | 3 of 3 | 2 of 2 | 5 of 5 |
| Twilio SendGrid | 4th | 1 of 3 | 2 of 2 | 3 of 5 |
| Mailgun | 5th | 3 of 3 | 1 of 2 | 4 of 5 |
| SMTP2GO | 6th | 0 of 3 | 2 of 2 | 2 of 5 |
| Mailjet | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 |
| Mailtrap | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 |

## Every AI answer about transactional email services

- Asked ChatGPT "Which transactional email service should I use?": 1. Resend, 2. Postmark, 3. Amazon SES, 4. Mailgun
- Asked ChatGPT "What are the best transactional email services?": 1. Resend, 2. Postmark, 3. Amazon SES, 4. Twilio SendGrid, 5. Mailgun
- Asked ChatGPT "What's the best transactional email service for app notifications?": 1. Resend, 2. Postmark, 3. Amazon SES, 4. Mailgun
- Searched Google, AI Overview "transactional email service": 1. Postmark, 2. Mailgun, 3. Twilio SendGrid, 4. SMTP2GO, 5. Resend, 6. Amazon SES
- Searched Google, AI Overview "email delivery service": 1. Amazon SES, 2. Postmark, 3. Twilio SendGrid, 4. SMTP2GO

Not named in any answer: Mailjet and Mailtrap.

Brands are listed in the order each answer named them. The answers were collected in the United States on October 21, 2026.

## Compare search popularity between leading brands

- [Twilio SendGrid vs Postmark: compare search popularity](/demand/global-en/compare/postmark-vs-sendgrid): 34.4% against 12.7% Share of Search.
- [Twilio SendGrid vs Mailgun: compare search popularity](/demand/global-en/compare/mailgun-vs-sendgrid): 34.4% against 12.2% Share of Search.
- [Twilio SendGrid vs Mailjet: compare search popularity](/demand/global-en/compare/mailjet-vs-sendgrid): 34.4% against 12.2% Share of Search.
- [Twilio SendGrid vs Resend: compare search popularity](/demand/global-en/compare/resend-vs-sendgrid): 34.4% against 8.4% Share of Search.
- [Postmark vs Mailgun: compare search popularity](/demand/global-en/compare/mailgun-vs-postmark): 12.7% against 12.2% Share of Search.
- [Postmark vs Mailjet: compare search popularity](/demand/global-en/compare/mailjet-vs-postmark): 12.7% against 12.2% Share of Search.
- [Postmark vs Resend: compare search popularity](/demand/global-en/compare/postmark-vs-resend): 12.7% against 8.4% Share of Search.
- [Mailgun vs Mailjet: compare search popularity](/demand/global-en/compare/mailgun-vs-mailjet): 12.2% Share of Search each.
- [Mailgun vs Resend: compare search popularity](/demand/global-en/compare/mailgun-vs-resend): 12.2% against 8.4% Share of Search.
- [Mailjet vs Resend: compare search popularity](/demand/global-en/compare/mailjet-vs-resend): 12.2% against 8.4% Share of Search.

## How did search popularity change for transactional email services worldwide in September 2026?

- 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.
- Estimated monthly branded searches for Mailtrap worldwide fell 32.7% over 12 measured months, from 60.6K to 40.8K in September 2026.

## Share of Search ranking

| Rank | Brand | Share of Search | Estimated monthly branded searches | Change vs prior month | Owned by |
| --- | --- | --- | --- | --- | --- |
| 1 | Twilio SendGrid | 34.4% | 209K | 0.0% | Twilio |
| 2 | Postmark | 12.7% | 77.3K | 0.0% | ActiveCampaign |
| 3 | Mailgun | 12.2% | 74.1K | -0.0% | Mailgun |
| 4 | Mailjet | 12.2% | 74K | +49.5% | Mailjet |
| 5 | Resend | 8.4% | 50.9K | +0.1% | Resend |
| 6 | Mailtrap | 6.7% | 40.8K | -0.1% | Mailtrap |
| 7 | Amazon SES | 6.7% | 40.5K | 0.0% | Amazon |
| 8 | SMTP2GO | 6.7% | 40.5K | 0.0% | SMTP2GO |

## Historical estimated branded-search demand

| Month | Brand | Estimated monthly branded searches | Share of Search | Rank |
| --- | --- | --- | --- | --- |
| Oct 2025 | Twilio SendGrid | 311K | 41.7% | 1 |
| Oct 2025 | Mailgun | 110K | 14.8% | 2 |
| Oct 2025 | Mailjet | 110K | 14.8% | 3 |
| Oct 2025 | Postmark | 63.5K | 8.5% | 4 |
| Oct 2025 | Mailtrap | 60.6K | 8.1% | 5 |
| Oct 2025 | SMTP2GO | 40.5K | 5.4% | 6 |
| Oct 2025 | Amazon SES | 33.1K | 4.4% | 7 |
| Oct 2025 | Resend | 17K | 2.3% | 8 |
| Nov 2025 | Twilio SendGrid | 254K | 38.5% | 1 |
| Nov 2025 | Mailgun | 110K | 16.7% | 2 |
| Nov 2025 | Mailjet | 90.5K | 13.7% | 3 |
| Nov 2025 | Postmark | 63.5K | 9.6% | 4 |
| Nov 2025 | Mailtrap | 49.6K | 7.5% | 5 |
| Nov 2025 | SMTP2GO | 40.5K | 6.1% | 6 |
| Nov 2025 | Amazon SES | 33.1K | 5% | 7 |
| Nov 2025 | Resend | 18.5K | 2.8% | 8 |
| Dec 2025 | Twilio SendGrid | 254K | 39.7% | 1 |
| Dec 2025 | Mailgun | 90.6K | 14.2% | 2 |
| Dec 2025 | Postmark | 76.6K | 12% | 3 |
| Dec 2025 | Mailjet | 74K | 11.6% | 4 |
| Dec 2025 | Mailtrap | 49.6K | 7.8% | 5 |
| Dec 2025 | SMTP2GO | 40.5K | 6.3% | 6 |
| Dec 2025 | Amazon SES | 33.1K | 5.2% | 7 |
| Dec 2025 | Resend | 20.8K | 3.3% | 8 |
| Jan 2026 | Twilio SendGrid | 254K | 36.3% | 1 |
| Jan 2026 | Mailgun | 110K | 15.8% | 2 |
| Jan 2026 | Mailjet | 90.5K | 12.9% | 3 |
| Jan 2026 | Postmark | 77.6K | 11.1% | 4 |
| Jan 2026 | Mailtrap | 49.7K | 7.1% | 5 |
| Jan 2026 | SMTP2GO | 49.5K | 7.1% | 6 |
| Jan 2026 | Amazon SES | 40.5K | 5.8% | 7 |
| Jan 2026 | Resend | 27.7K | 4% | 8 |
| Feb 2026 | Twilio SendGrid | 254K | 37.5% | 1 |
| Feb 2026 | Mailgun | 110K | 16.3% | 2 |
| Feb 2026 | Postmark | 77.3K | 11.4% | 3 |
| Feb 2026 | Mailjet | 74K | 10.9% | 4 |
| Feb 2026 | Mailtrap | 49.8K | 7.3% | 5 |
| Feb 2026 | Amazon SES | 40.5K | 6% | 6 |
| Feb 2026 | SMTP2GO | 40.5K | 6% | 7 |
| Feb 2026 | Resend | 31.2K | 4.6% | 8 |
| Mar 2026 | Twilio SendGrid | 311K | 39.7% | 1 |
| Mar 2026 | Mailgun | 110K | 14.1% | 2 |
| Mar 2026 | Mailjet | 90.5K | 11.6% | 3 |
| Mar 2026 | Postmark | 77.3K | 9.9% | 4 |
| Mar 2026 | Mailtrap | 60.7K | 7.8% | 5 |
| Mar 2026 | SMTP2GO | 49.5K | 6.3% | 6 |
| Mar 2026 | Resend | 43.3K | 5.5% | 7 |
| Mar 2026 | Amazon SES | 40.5K | 5.2% | 8 |
| Apr 2026 | Twilio SendGrid | 256K | 36.4% | 1 |
| Apr 2026 | Mailgun | 110K | 15.7% | 2 |
| Apr 2026 | Postmark | 77.3K | 11% | 3 |
| Apr 2026 | Mailjet | 74K | 10.5% | 4 |
| Apr 2026 | Mailtrap | 60.8K | 8.7% | 5 |
| Apr 2026 | Resend | 43K | 6.1% | 6 |
| Apr 2026 | Amazon SES | 40.5K | 5.8% | 7 |
| Apr 2026 | SMTP2GO | 40.5K | 5.8% | 8 |
| May 2026 | Twilio SendGrid | 254K | 39.2% | 1 |
| May 2026 | Mailgun | 90.7K | 14% | 2 |
| May 2026 | Postmark | 76.8K | 11.8% | 3 |
| May 2026 | Mailjet | 60.5K | 9.3% | 4 |
| May 2026 | Mailtrap | 49.8K | 7.7% | 5 |
| May 2026 | Resend | 43.3K | 6.7% | 6 |
| May 2026 | SMTP2GO | 40.5K | 6.2% | 7 |
| May 2026 | Amazon SES | 33.1K | 5.1% | 8 |
| Jun 2026 | Twilio SendGrid | 254K | 38.3% | 1 |
| Jun 2026 | Mailgun | 90.7K | 13.7% | 2 |
| Jun 2026 | Postmark | 76.8K | 11.6% | 3 |
| Jun 2026 | Mailjet | 74K | 11.2% | 4 |
| Jun 2026 | Mailtrap | 49.9K | 7.5% | 5 |
| Jun 2026 | Resend | 44.4K | 6.7% | 6 |
| Jun 2026 | SMTP2GO | 40.5K | 6.1% | 7 |
| Jun 2026 | Amazon SES | 33.1K | 5% | 8 |
| Jul 2026 | Twilio SendGrid | 209K | 33.5% | 1 |
| Jul 2026 | Mailgun | 90.7K | 14.5% | 2 |
| Jul 2026 | Postmark | 76.8K | 12.3% | 3 |
| Jul 2026 | Mailjet | 60.5K | 9.7% | 4 |
| Jul 2026 | Resend | 56.7K | 9.1% | 5 |
| Jul 2026 | Mailtrap | 49.9K | 8% | 6 |
| Jul 2026 | Amazon SES | 40.5K | 6.5% | 7 |
| Jul 2026 | SMTP2GO | 40.5K | 6.5% | 8 |
| Aug 2026 | Twilio SendGrid | 209K | 35.9% | 1 |
| Aug 2026 | Postmark | 77.3K | 13.3% | 2 |
| Aug 2026 | Mailgun | 74.2K | 12.7% | 3 |
| Aug 2026 | Resend | 50.9K | 8.7% | 4 |
| Aug 2026 | Mailjet | 49.5K | 8.5% | 5 |
| Aug 2026 | Mailtrap | 40.9K | 7% | 6 |
| Aug 2026 | Amazon SES | 40.5K | 6.9% | 7 |
| Aug 2026 | SMTP2GO | 40.5K | 6.9% | 8 |
| Sep 2026 | Twilio SendGrid | 209K | 34.4% | 1 |
| Sep 2026 | Postmark | 77.3K | 12.7% | 2 |
| Sep 2026 | Mailgun | 74.1K | 12.2% | 3 |
| Sep 2026 | Mailjet | 74K | 12.2% | 4 |
| Sep 2026 | Resend | 50.9K | 8.4% | 5 |
| Sep 2026 | Mailtrap | 40.8K | 6.7% | 6 |
| Sep 2026 | Amazon SES | 40.5K | 6.7% | 7 |
| Sep 2026 | SMTP2GO | 40.5K | 6.7% | 8 |

## What is being compared

- **Amazon SES**: Measured on the search term “amazon ses”.
- **Mailgun**: Measured on the search terms “mailgun” and “mailgun email”, summed into one figure.
- **Mailjet**: Measured on the search term “mailjet”.
- **Mailtrap**: Measured on the search terms “mailtrap”, “mailtrap email” and “mailtrap email sandbox”, summed into one figure.
- **Postmark**: Measured on the search terms “postmark”, “postmark email” and “postmarkapp”, summed into one figure.
- **Resend**: Measured on the search terms “resend api”, “resend email”, “resend email api” and “resend transactional email”, summed into one figure.
- **SMTP2GO**: Measured on the search term “smtp2go”.
- **Twilio SendGrid**: Measured on the search terms “sendgrid” and “twilio sendgrid”, summed into one figure.

- [Amazon SES](/demand/global-en/brands/amazon-ses)
- [Mailgun](/demand/global-en/brands/mailgun)
- [Mailjet](/demand/global-en/brands/mailjet)
- [Mailtrap](/demand/global-en/brands/mailtrap)
- [Postmark](/demand/global-en/brands/postmark)
- [Resend](/demand/global-en/brands/resend)
- [SMTP2GO](/demand/global-en/brands/smtp2go)
- [Twilio SendGrid](/demand/global-en/brands/sendgrid)

## Methodology

- [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused.

## Frequently asked questions

### Which brand is most popular in search among transactional email services worldwide?

In September 2026, Twilio SendGrid was the most searched among transactional email services worldwide, with an estimated 209K branded searches, 34.4% of all searches for the eight we track. These are worldwide searches for English-language branded terms.

## Cite this page

Brandwave. "Transactional email services: Which are searched most?". https://gobrandwave.com/demand/global-en/categories/transactional-email-services

This page is also available as HTML at https://gobrandwave.com/demand/global-en/categories/transactional-email-services. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.