Mail-Tester vs MXToolbox:Which is more popular?
In September 2026, MXToolbox had more branded searches than Mail-Tester among email deliverability testing tools worldwide. MXToolbox had about 301,000 branded searches, while Mail-Tester had 72,700. MXToolbox made up 70% of all email deliverability testing tool searches we track, and Mail-Tester accounted for 16.9%. When we asked ChatGPT and Google AI Overviews about email deliverability testing tools, Mail-Tester appeared in four of the five answers and MXToolbox in two. Mail-Tester was mentioned before MXToolbox in three out of four answers.
Who do people search for more?
MXToolbox, about 4 searches for every 1 for Mail-Tester
Who does AI mention more?
Mail-Tester, mentioned in 4 of 5 answers, MXToolbox in 2
Who does AI recommend more?
Mail-Tester, named ahead of MXToolbox in 3 of 4 answers
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Top email deliverability testing tools in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Mail-Tester was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. MXToolbox was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Mail-Tester was listed before MXToolbox in three out of four answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
GlockApps1st- Mail-Tester2nd
MailReach3rd- MXToolbox4th
Litmus5th
Mailtrap6th
InboxAlly–
MailMonitor–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Mail-Tester4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- GlockApps4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- MailReach3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- MXToolbox2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Mailtrap2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Litmus2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- InboxAlly0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- MailMonitor0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about email deliverability testing tools
5 answers
Asked ChatGPT
“Which email deliverability testing tool should I use?”
Asked ChatGPT
“What are the best email deliverability testing tools?”
Asked ChatGPT
“What's the best email deliverability testing tool for better inbox placement?”
Searched Google, AI Overview
“email deliverability tool”
Searched Google, AI Overview
“email spam test”
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 Mail-Tester or MXToolbox more popular in search?
This chart shows how often people search Google for Mail-Tester and MXToolbox by name. Each line represents a brand's share of searches for all eight email deliverability testing tools we track, month by month, from English-language searches worldwide.
Share of searches by month for MXToolbox, Mail-Tester. The figures are in the table below the chart.
View monthly share of searches table
| Month | MXToolbox | Mail-Tester | Mailtrap | GlockApps | MailReach | InboxAlly | Litmus | MailMonitor |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 66.5% | 16.6% | 13.8% | 1.5% | 0.97% | 0.24% | 0.19% | 0.19% |
| Nov 2025 | 68.6% | 16.6% | 11.7% | 1.5% | 1% | 0.2% | 0.2% | 0.2% |
| Dec 2025 | 66.2% | 16.6% | 13.9% | 1.5% | 1.2% | 0.29% | 0.19% | 0.24% |
| Jan 2026 | 68.3% | 17.1% | 11.8% | 1.2% | 1% | 0.22% | 0.16% | 0.2% |
| Feb 2026 | 68.2% | 17.1% | 11.7% | 1.2% | 1.2% | 0.24% | 0.16% | 0.2% |
| Mar 2026 | 68.8% | 16.6% | 11.8% | 1.2% | 1% | 0.17% | 0.16% | 0.16% |
| Apr 2026 | 70.5% | 14.4% | 12.1% | 1.3% | 1.3% | 0.21% | 0.17% | 0.14% |
| May 2026 | 68.5% | 16.6% | 11.8% | 1.2% | 1.2% | 0.2% | 0.16% | 0.2% |
| Jun 2026 | 68.3% | 16.7% | 11.7% | 1.5% | 1.2% | 0.2% | 0.16% | 0.16% |
| Jul 2026 | 68.1% | 17% | 11.7% | 1.5% | 1.2% | 0.21% | 0.13% | 0.13% |
| Aug 2026 | 67.1% | 17.6% | 11.6% | 1.5% | 1.5% | 0.29% | 0.2% | 0.2% |
| Sep 2026 | 70% | 16.9% | 9.8% | 1.5% | 1.3% | 0.24% | 0.14% | 0.14% |
How has the Mail-Tester and MXToolbox comparison changed over the last 12 months?
3 findings
- MXToolbox was ahead of Mail-Tester in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Mail-Tester’s share of searches among email deliverability testing tools worldwide moved from 16.6% to 16.9%, and its estimated monthly branded searches moved from 75.3K to 72.7K.
- Across the 12 months ending September 2026, MXToolbox’s share of searches among email deliverability testing tools worldwide moved from 66.5% to 70%, and its estimated monthly branded searches held steady at 301K.
How did search popularity change for email deliverability testing tools worldwide in September 2026?
2 changes
In September 2026, MXToolbox gained share of searches among email deliverability testing tools worldwide, from 67.1% to 70%.
In September 2026, Mail-Tester lost share of searches among email deliverability testing tools worldwide, from 17.6% to 16.9%.
How are branded searches counted?
5 search terms
Brandwave collects information about searches that people make online using Mail-Tester’s and MXToolbox’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.
Mail-Tester
4 branded search terms
- mail-tester
- mail-tester email testing
- mail-tester software
- mailtester
MXToolbox
1 branded search term
- mxtoolbox
Other head-to-heads among email deliverability testing tools
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