GlockApps vs MXToolbox:Which is more popular?
In September 2026, MXToolbox had more branded searches than GlockApps among email deliverability testing tools worldwide. MXToolbox had about 301,000 branded searches, while GlockApps had 6,600. MXToolbox made up 70% of all email deliverability testing tool searches we track, and GlockApps accounted for 1.5%. When we asked ChatGPT and Google AI Overviews about email deliverability testing tools, GlockApps appeared in four of the five answers and MXToolbox in two. GlockApps was mentioned before MXToolbox in every answer.
Who do people search for more?
MXToolbox, about 46 searches for every 1 for GlockApps
Who does AI mention more?
GlockApps, mentioned in 4 of 5 answers, MXToolbox in 2
Who does AI recommend more?
GlockApps, named ahead of MXToolbox in every answer
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Top email deliverability testing tools in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, GlockApps 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. GlockApps was listed before MXToolbox in every answer.
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 GlockApps or MXToolbox more popular in search?
This chart shows how often people search Google for GlockApps 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, GlockApps. 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 GlockApps and MXToolbox comparison changed over the last 12 months?
3 findings
- MXToolbox was ahead of GlockApps in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, GlockApps’ share of searches among email deliverability testing tools worldwide held steady at 1.5%, and its estimated monthly branded searches held steady at 6.6K.
- 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?
1 change
In September 2026, MXToolbox gained share of searches among email deliverability testing tools worldwide, from 67.1% to 70%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using GlockApps’ 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.
Other head-to-heads among email deliverability testing tools
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