--- title: "How popular is Inbox Zero? Searches and AI answers worldwide" description: "An open-source AI email assistant. 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/brands/inbox-zero-app" publisher: "Brandwave" --- # How popular is Inbox Zero? Searches and AI answers worldwide An open-source AI email assistant. 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 - **Brand**: Inbox Zero - **Market**: Global - **Measured month**: Sep 2026 - **Share of Search among AI email assistants**: 0.24% ## Where does Inbox Zero compete? | Competitive set | Rank | Share of Search | Estimated monthly branded searches | | --- | --- | --- | --- | | AI email assistants | 6 | 0.24% | 140 | - [AI email assistants](/demand/global-en/categories/ai-email-assistants) ## Top AI email assistants in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Inbox Zero was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. Inbox Zero is the fourth most recommended of the six. 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 | | --- | --- | --- | --- | --- | | Superhuman | 1st | 3 of 3 | 2 of 2 | 5 of 5 | | Fyxer AI | 2nd | 2 of 3 | 1 of 2 | 3 of 5 | | Shortwave | 3rd | 3 of 3 | 2 of 2 | 5 of 5 | | Inbox Zero | 4th | 3 of 3 | 0 of 2 | 3 of 5 | | SaneBox | 5th | 0 of 3 | 1 of 2 | 1 of 5 | | Mailbutler | 6th | 0 of 3 | 1 of 2 | 1 of 5 | ## Every AI answer about AI email assistants - Asked ChatGPT "Which AI email assistant should I use?": 1. Fyxer AI, 2. Superhuman, 3. Shortwave, 4. Inbox Zero - Asked ChatGPT "What are the best AI email assistants?": 1. Fyxer AI, 2. Superhuman, 3. Shortwave, 4. Inbox Zero - Asked ChatGPT "What's the best AI email assistant for a busy inbox?": 1. Inbox Zero, 2. Superhuman, 3. Shortwave - Searched Google, AI Overview "ai email assistants": 1. Superhuman, 2. Fyxer AI, 3. Shortwave - Searched Google, AI Overview "email productivity tool": 1. Superhuman, 2. Shortwave, 3. SaneBox, 4. Mailbutler Brands are listed in the order each answer named them. The answers were collected in the United States on October 20, 2026. ## How has branded search demand for Inbox Zero changed worldwide over the last 12 months? - Across the 11 months ending September 2026, estimated monthly branded searches for Inbox Zero worldwide fell from 220 to 140. - Across the 11 months ending September 2026, Inbox Zero’s share of searches among AI email assistants worldwide held steady, from 0.2% to 0.24%. ## How did search popularity change for AI email assistants worldwide in September 2026? - In September 2026, Fyxer AI gained share of searches among AI email assistants worldwide, from 36% to 44.8%. - In September 2026, Superhuman gained share of searches among AI email assistants worldwide, from 37.5% to 46.2%. - In September 2026, SaneBox lost share of searches among AI email assistants worldwide, from 12.7% to 5%. - In September 2026, Mailbutler lost share of searches among AI email assistants worldwide, from 10.4% to 2.7%. - In September 2026, Shortwave lost share of searches among AI email assistants worldwide, from 3.1% to 1%. - Estimated monthly branded searches for Inbox Zero worldwide fell 36.4% over 11 measured months, from 220 to 140 in September 2026. ## Historical estimated branded-search demand | Month | Competitive set | Estimated monthly branded searches | Share of Search | Rank | | --- | --- | --- | --- | --- | | Nov 2025 | AI email assistants | 220 | 0.2% | 6 | | Dec 2025 | AI email assistants | 160 | 0.17% | 6 | | Jan 2026 | AI email assistants | 200 | 0.18% | 6 | | Feb 2026 | AI email assistants | 200 | 0.19% | 6 | | Mar 2026 | AI email assistants | 230 | 0.19% | 6 | | Apr 2026 | AI email assistants | 180 | 0.19% | 6 | | May 2026 | AI email assistants | 160 | 0.18% | 6 | | Jun 2026 | AI email assistants | 180 | 0.24% | 6 | | Jul 2026 | AI email assistants | 180 | 0.3% | 6 | | Aug 2026 | AI email assistants | 140 | 0.22% | 6 | | Sep 2026 | AI email assistants | 140 | 0.24% | 6 | | Oct 2026 | AI email assistants | — | — | — | ## How are Inbox Zero’s branded searches counted? Brandwave collects information about searches that people make online using Inbox Zero’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. - “getinboxzero” - “inbox zero ai” ## Which AI email assistants compete with Inbox Zero? - [Superhuman](/demand/global-en/brands/superhuman): Head-to-head: /demand/global-en/compare/inbox-zero-app-vs-superhuman - [Fyxer AI](/demand/global-en/brands/fyxer-ai): Head-to-head: /demand/global-en/compare/fyxer-ai-vs-inbox-zero-app - [SaneBox](/demand/global-en/brands/sanebox): Head-to-head: /demand/global-en/compare/inbox-zero-app-vs-sanebox - [Mailbutler](/demand/global-en/brands/mailbutler): Head-to-head: /demand/global-en/compare/inbox-zero-app-vs-mailbutler - [Shortwave](/demand/global-en/brands/shortwave): Head-to-head: /demand/global-en/compare/inbox-zero-app-vs-shortwave ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Cite this page Brandwave. "How popular is Inbox Zero? Searches and AI answers worldwide". https://gobrandwave.com/demand/global-en/brands/inbox-zero-app This page is also available as HTML at https://gobrandwave.com/demand/global-en/brands/inbox-zero-app. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.