--- title: "Litmus vs Mail-Tester: Which is searched more?" description: "Is Litmus or Mail-Tester more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Email deliverability testing tools set worldwide. 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/compare/litmus-vs-mail-tester" publisher: "Brandwave" --- # Litmus vs Mail-Tester: Which is searched more? Is Litmus or Mail-Tester more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Email deliverability testing tools set worldwide. 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 - **Compared**: Litmus and Mail-Tester - **Competitive set**: Email deliverability testing tools - **Market**: Global - **Month measured**: Sep 2026 - **Litmus Share of Search**: 0.14% - **Mail-Tester Share of Search**: 16.9% ## Is Litmus or Mail-Tester more popular in search? - In September 2026, Mail-Tester had more branded searches than Litmus among email deliverability testing tools worldwide. Mail-Tester had about 72,700 branded searches, while Litmus had 590. Mail-Tester made up 16.9% of all email deliverability testing tool searches we track, and Litmus accounted for 0.14%. - Mail-Tester was ahead of Litmus in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, Litmus’ share of searches among email deliverability testing tools worldwide moved from 0.19% to 0.14%, and its estimated monthly branded searches moved from 880 to 590. - 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. ## 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. Litmus was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Mail-Tester was listed before Litmus in every answer that named either. 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 | | --- | --- | --- | --- | --- | | GlockApps | 1st | 3 of 3 | 1 of 2 | 4 of 5 | | Mail-Tester | 2nd | 3 of 3 | 1 of 2 | 4 of 5 | | MailReach | 3rd | 3 of 3 | 0 of 2 | 3 of 5 | | MXToolbox | 4th | 1 of 3 | 1 of 2 | 2 of 5 | | Litmus | 5th | 2 of 3 | 0 of 2 | 2 of 5 | | Mailtrap | 6th | 2 of 3 | 0 of 2 | 2 of 5 | | InboxAlly | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | MailMonitor | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about email deliverability testing tools - Asked ChatGPT "Which email deliverability testing tool should I use?": 1. GlockApps, 2. Mail-Tester, 3. MailReach, 4. Litmus, 5. Mailtrap - Asked ChatGPT "What are the best email deliverability testing tools?": 1. GlockApps, 2. Mail-Tester, 3. MailReach, 4. MXToolbox, 5. Mailtrap - Asked ChatGPT "What's the best email deliverability testing tool for better inbox placement?": 1. GlockApps, 2. MailReach, 3. Mail-Tester, 4. Litmus - Searched Google, AI Overview "email deliverability tool": 1. GlockApps, 2. MXToolbox - Searched Google, AI Overview "email spam test": 1. Mail-Tester Not named in any answer: InboxAlly and MailMonitor. Brands are listed in the order each answer named them. The answers were collected in the United States on October 20, 2026. ## How did search popularity change for email deliverability testing tools worldwide in September 2026? - In September 2026, Mail-Tester lost share of searches among email deliverability testing tools worldwide, from 17.6% to 16.9%. - Estimated monthly branded searches for Litmus worldwide fell 33% over 12 measured months, from 880 to 590 in September 2026. ## Month by month | Month | Litmus estimated searches | Litmus Share of Search | Litmus rank | Mail-Tester estimated searches | Mail-Tester Share of Search | Mail-Tester rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 880 | 0.19% | 7 | 75.3K | 16.6% | 2 | | Nov 2025 | 880 | 0.2% | 7 | 72.6K | 16.6% | 2 | | Dec 2025 | 720 | 0.19% | 8 | 61.6K | 16.6% | 2 | | Jan 2026 | 720 | 0.16% | 8 | 75.3K | 17.1% | 2 | | Feb 2026 | 720 | 0.16% | 8 | 75.4K | 17.1% | 2 | | Mar 2026 | 880 | 0.16% | 7 | 88.9K | 16.6% | 2 | | Apr 2026 | 880 | 0.17% | 7 | 75.3K | 14.4% | 2 | | May 2026 | 720 | 0.16% | 8 | 72.9K | 16.6% | 2 | | Jun 2026 | 720 | 0.16% | 7 | 73.5K | 16.7% | 2 | | Jul 2026 | 590 | 0.13% | 7 | 75K | 17% | 2 | | Aug 2026 | 720 | 0.2% | 7 | 64.5K | 17.6% | 2 | | Sep 2026 | 590 | 0.14% | 7 | 72.7K | 16.9% | 2 | ## How each brand is measured Brandwave collects information about searches that people make online using Litmus’ and Mail-Tester’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. - **Litmus**: Measured on the search term “litmus email”. - **Mail-Tester**: Measured on the search terms “mail-tester”, “mail-tester email testing”, “mail-tester software” and “mailtester”, summed into one figure. - [Litmus profile](/demand/global-en/brands/litmus) - [Mail-Tester profile](/demand/global-en/brands/mail-tester) - [All email deliverability testing tools worldwide](/demand/global-en/categories/email-deliverability-testing-tools): The set both shares are measured inside, 8 brands. ## 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 ### Is Litmus or Mail-Tester more popular in search? In September 2026, Mail-Tester had more branded searches than Litmus among email deliverability testing tools worldwide. Mail-Tester had about 72,700 branded searches, while Litmus had 590. Mail-Tester made up 16.9% of all email deliverability testing tool searches we track, and Litmus accounted for 0.14%. ## Cite this page Brandwave. "Litmus vs Mail-Tester: Which is searched more?". https://gobrandwave.com/demand/global-en/compare/litmus-vs-mail-tester This page is also available as HTML at https://gobrandwave.com/demand/global-en/compare/litmus-vs-mail-tester. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.