Comet, Perplexity’s agentic browser, dropped to 9.4% of the AI-agent traffic HUMAN Security observed in September 2026, after leading every month from April to August.
This set of AI browser statistics follows Arc, Dia and Comet through that traffic data, feature use, pricing, phishing tests, deal values and release dates, using figures from the companies and researchers that published them.
AI Browser Statistics (Arc, Dia, Comet)
Arc, Dia and Comet Compared: AI Browser Statistics for October 2026
Arc and Dia come from The Browser Company, which Atlassian has owned since October 21, 2025. Comet belongs to Perplexity, whose search business has its own usage and revenue record.
| Item | Arc | Dia | Comet |
|---|---|---|---|
| Developer | The Browser Company (Atlassian) | The Browser Company (Atlassian) | Perplexity |
| Status | Chromium upgrades and security fixes only, confirmed May 2025 | Active; Windows v1.0 released October 6, 2026 | Active; free download since October 2, 2025 |
| Platforms | macOS, Windows | macOS, Windows | Windows, macOS, Android, iOS |
| Price | Free | Browser free; Better Answers $20/month (FAQ) or $10/month (plan card); Better Days $100/month | Free download |
Source: The Browser Company, May 2025; Atlassian, October 2025; Dia changelog and plans page, October 2026; Perplexity and TechCrunch, 2025–2026
Dia’s Windows changelog lists v1.0 on October 6, 2026 and v1.1.0 on October 8. PiunikaWeb reported that the installer described the build as early and untested.
Dia’s paid AI plans began rolling out to most new Mac users on August 17, 2026. Its plans page says existing users get at least 30 days’ notice and Windows stays as it is for now.
Source: Dia changelog and plans page, October 2026; PiunikaWeb, October 7, 2026
Comet Fell to 9.4% of HUMAN-Tracked Agent Traffic in September 2026
Meta’s Muse launched on September 8, 2026 and finished the month with 40.3% of the AI-agent traffic HUMAN Security observed. ChatGPT Agent rose to 28.6%; OpenAI’s wider chatbot numbers sit in our ChatGPT usage statistics.
HUMAN says those two rises pushed Comet from first place to third. Comet’s share fell from 40.7% in August to 9.4%, and its absolute traffic dropped 28.3%.
Codex Browser took 7.7%, Claude Chrome Extension 7.1%, Codex Chrome Extension 3.4%, Browserbase 1.7%, AgentCore Browser 1%, Genspark 0.5% and Browser Use Cloud 0.2%. Total agentic traffic rose 209.7% over August.
Each figure is a share of AI-agent requests seen by HUMAN’s detection platform, not a user count. HUMAN added dedicated Muse detection on September 22, 2026.
Source: HUMAN Security, State of Agentic Traffic, September 2026
Comet’s Monthly Share, April to September 2026
Comet ranked first in each month from April through August 2026. OpenAI sunset Atlas on August 9, 2026, and HUMAN called ChatGPT Agent’s rise from 6% in July to 19.8% in August one possible result of absorbing Atlas traffic.
| Month (2026) | Comet | Claude Chrome Extension | Atlas | Comet rank |
|---|---|---|---|---|
| April | 48.12% | 17.33% | 21.33% | 1st |
| May | 47% | 18.6% | 20.3% | 1st |
| June | 47.6% | 20.8% | 16.5% | 1st |
| July | 47.13% | 24% | 15.5% | 1st |
| August | 40.7% | 22% | 4.1% | 1st |
| September | 9.4% | 7.1% | Sunset August 9 | 3rd |
Source: HUMAN Security, State of Agentic Traffic monthly reports, April–September 2026
AI Browser Statistics on Phishing: Dia 46%, Comet 7%
LayerX ran 100 phishing pages against three AI browsers and two traditional browsers, publishing the results on September 9, 2025.
Microsoft Edge blocked 54% and Google Chrome 47%. Dia blocked 46%, which LayerX tied to its use of Google’s Safe Browsing APIs.
Comet and Genspark each blocked 7%. LayerX described Comet as up to 85% more exposed to phishing and web attacks than Chrome.
Gartner’s December 1, 2025 note, “Cybersecurity Must Block AI Browsers for Now,” told CISOs to block AI browsers until enterprise-ready versions reach general availability. Company-level uptake of agents is tracked in our AI agent adoption statistics.
Source: LayerX Security, September 2025; Gartner, December 1, 2025
What Share of Arc and Dia Daily Users Touched Core Features?
The Browser Company published both sets of figures in its May 2025 letter to Arc members. Each percentage uses that browser’s own daily active users as the base, so the Arc and Dia figures do not share a denominator.
Arc Feature Use
Of Arc’s daily active users, 5.52% used more than one Space regularly and 4.17% used Live Folders. Calendar Preview on Hover reached 0.4%.
CEO Josh Miller wrote that Arc’s day-one retention was strong, but its metrics looked closer to a specialist professional tool than a mass-market product.
Dia Feature Use
Chatting with tabs reached 40% of Dia’s daily active users, and personalization features reached 37%. At the time, Dia was in an alpha that had not yet opened beyond students.
The company also said it grew its security engineering team from one person to five while building Dia.
Source: The Browser Company, Letter to Arc members 2025, May 2025
Key Dates Behind the AI Browser Statistics, 2025 to 2026
Comet added Android on November 20, 2025 and iOS on March 18, 2026, about eight months after its desktop launch. On phones it meets Chrome, which led StatCounter’s September 2026 mobile rankings; earlier years sit in our Chrome mobile market share breakdown.
| Date | Browser | Event | Source |
|---|---|---|---|
| May 2025 | Arc | Feature work ends; Chromium upgrades and security fixes continue | The Browser Company |
| July 9, 2025 | Comet | Launch for Perplexity Max subscribers at $200/month | TechCrunch; TechRepublic |
| September 4, 2025 | Arc, Dia | Atlassian agrees to buy The Browser Company | Atlassian |
| October 2, 2025 | Comet | Free worldwide; Perplexity says millions joined the waitlist in the prior 84 days | Perplexity |
| October 21, 2025 | Arc, Dia | Atlassian completes the acquisition | Atlassian |
| November 20, 2025 | Comet | Android release | TechCrunch |
| December 1, 2025 | AI browsers | Gartner tells CISOs to block AI browsers for now | Gartner |
| March 18, 2026 | Comet | iOS release | Perplexity |
| August 17, 2026 | Dia | Paid AI plans start rolling out to most new Mac users | Dia |
| October 6, 2026 | Dia | Windows v1.0 released | Dia changelog |
Source: as listed in each row; dates as published, May 2025 to October 2026
Atlassian Paid $610 Million; Perplexity Offered $34.5 Billion for Chrome
Atlassian agreed on September 4, 2025 to buy The Browser Company for about $610 million in cash, including the startup’s cash balance. The purchase closed on October 21, 2025.
TechCrunch reported that The Browser Company had raised $128 million in total before the agreement.
Perplexity sent Google an unsolicited $34.5 billion offer for Chrome on August 12, 2025, when Bloomberg put Perplexity’s own valuation at $18 billion. Axios reported the term sheet was nonbinding, and the browser it targeted is profiled in our Google Chrome statistics.
Source: Atlassian via Business Wire, September 4 and October 21, 2025; TechCrunch, September 4, 2025; Bloomberg and Axios, August 12, 2025
Where Do AI Browsers Rank in StatCounter’s September 2026 Data?
| Browser | Share of worldwide page views, September 2026 |
|---|---|
| Chrome | 66.36% |
| Safari | 18.27% |
| Edge | 6.04% |
| Firefox | 2.8% |
| Samsung Internet | 2.31% |
| Opera | 1.77% |
Source: StatCounter Global Stats, all platforms, worldwide, September 2026
Arc, Dia and Comet do not appear among the six browsers StatCounter lists. These shares come from StatCounter’s sample of over 3 billion monthly page views and do not count installed users.
Chrome led with 66.36% and Safari followed at 18.27%. Browser choice on ChromeOS devices is covered in our Chromebook browser usage statistics.
FAQs
Is the Arc browser dead, as Reddit threads ask?
Not shut down. In its May 2025 letter, The Browser Company said Arc still gets Chromium upgrades and security fixes, but active feature development stopped as the team moved to Dia.
Is Perplexity Comet free?
Yes. Perplexity made Comet a free download worldwide on October 2, 2025, after launching it on July 9, 2025 for Max subscribers paying $200 a month. It runs on Windows, macOS, Android and iOS.
How much does Dia cost?
The browser is free with no AI features. Dia’s plans page lists Better Answers at $20/month in its FAQ and $10/month on the plan card, and Better Days at $100/month, for new Mac users since August 17, 2026.
Is Comet safe to use?
Published tests flag risks. LayerX’s September 2025 test found Comet blocked 7% of 100 phishing pages, against 47% for Chrome, and Gartner told CISOs on December 1, 2025 to block AI browsers for now.
How many people use Comet?
Perplexity’s October 2, 2025 announcement said millions had joined the Comet waitlist in 84 days but gave no monthly user total. HUMAN Security put Comet at 9.4% of observed agent traffic in September 2026, a traffic share.
