Can ChatGPT Atlas and Comet Dethrone Chrome?

In October 2025, the browsing world took another decisive leap. ChatGPT Atlas, the new AI-powered browser from OpenAI, entered the market with ambitions that go far beyond incremental browser improvements. At the same time, Comet, from Perplexity AI, is already in play and challenging the status quo. These launches are more than product updates: they signal a shift in how we access the web, who controls that access, and how the mix of browsing, searching and acting online will evolve.

Most importantly, they threaten to recalibrate the power of Google Chrome and by extension the role of Google LLC as gatekeeper of the web.

What Atlas and Comet bring to the table

ChatGPT Atlas

Built on the Chromium engine, Atlas integrates the ChatGPT assistant directly into the browser interface. According to coverage, you’ll see a persistent sidebar where the AI can summarise web pages, automate tasks (in “Agent Mode”), and draw on prior context like open tabs and sessions. 

Its rollout begins on macOS, with Windows, iOS and Android versions “coming soon”. The implication is clear: OpenAI aims to make the browser itself an extension of the conversational AI experience.

Perplexity Comet

Comet, launched earlier in 2025, is positioned as an AI-first browser with deep entanglement of search, summarisation and in-page actions. It uses the familiar Chromium base (so extension compatibility is there), but embeds an AI assistant sidebar, supports task automation like filling forms or shopping flows, and makes summarisation a native feature.

Crucially, Comet comes with a default search engine set to Perplexity, not Google — a strategic move that cuts directly into Google’s search funnel.

Why this matters: the browser war renews

The web browser has long been more than a software tool; it’s a critical distribution platform. The browser sets defaults, it often determines which search engine gets used, which ad-networks are embedded, and how users link out to content. For many years, Chrome’s dominance gave Google enormous leverage: default search positioning, user data collection, and the ability to steer the ecosystem.

Now, the rise of AI-centric browsers threatens to recast that dynamic. Instead of “you open Chrome and search with Google”, the experience becomes “you open this browser, ask the AI, and it acts for you”. In that scenario:

• The traditional search engine model (keyword → results list) is weakened.
• The click-through economy (websites depended on visits via search) may be disrupted.
• Default search engine deals may shift as AI assistants embed or replace search.

Atlas and Comet are more than browser alternatives. They’re attempts to redefine what a browser is and who controls the interface between user and web.

The impact on Google

For Google, these developments raise three major strategic issues:

Search and traffic volume: If users start relying on AI-integrated browsers that provide answers or automate tasks without redirecting to Google’s search results page, Google could lose both volume and ad revenue. Comet’s default search engine switch is a direct challenge.

Browser default and ecosystem lock-in: Chrome’s ubiquity stems from device defaults, OS integration and extension ecosystem. As AI browsers gain adoption, Google will need to defend not just search, but browser share and influence over default behaviours

Advertising and content monetisation models: If the browsing experience shifts from “search → click → site” to “ask AI → answer/task done”, publishers and advertisers may struggle to monetise the traditional way. Google’s business model (search + ads) may need to adapt if those user flows change significantly. Media analysis already flags concerns about new “news black holes” where users get summaries rather than visiting source sites.

In short: Google faces pressure not just from alternative search engines, but from alternative browsing frameworks that could strip search out of the middle-man role.

Opportunities and risks in the shifting landscape

For users

Opportunity: More efficiency. You might ask your browser “plan my weekend trip” and the AI combs sites, compares flights, summarises articles and books hotels.

Risk: Trust, privacy and security. For example, early reviews of Comet raise concerns: summarisation features may enable malicious commands hidden in pages.

According to cybersecurity firm LayerX, even a carefully crafted link sent through an email, a browser extension, or a malicious website could allow attackers to expose and extract sensitive data from Comet. This reveals a wider concern for the entire category of AI browsers. They are operating on very thin ice when it comes to security, and the industry is only beginning to understand the potential vulnerabilities and attack vectors that come with deeply integrating artificial intelligence into web browsing.

For publishers and advertisers

Opportunity: New formats of engagement; “AI-driven browsing assistants” may open alternative monetisation pathways (e.g., task-completion ads or subscription services).

Risk: Loss of downstream traffic. If users stay inside the assistant/browser environment and don’t click through, page-views could drop; that threatens ad models tied to visits.

For platform and browser companies

Opportunity: Re-architecting the browser as an AI-native experience opens room to capture value previously held by search engines.

Risk: High execution bar. Simply building an AI sidebar isn’t enough. Integration, trust, cross-platform roll-out, security and ecosystem partnerships all matter. Chrome’s incumbency is strong for a reason.

What to watch next

1. Which browser wins default placement on devices (Windows, macOS, mobile) default matters a lot.
2. How monetisation evolves: will AI browsers build revenue via subscriptions, task-completion offers, or continue to rely on ad models?
3. How search engine deals shift: will Google fight to retain default status or will new entrants claim a seat at the table?
4. How publishers adapt: licensing deals, summarisation rights, new UI models for content consumption.
5. How regulation and trust issues evolve: when AI browsers act on behalf of users, security and privacy become more critical than ever.

Conclusion

The emergence of ChatGPT Atlas and Perplexity Comet marks a defining moment in how we experience the internet. The web browser is evolving from a passive viewing tool into an intelligent companion capable of summarising information, reasoning across content, and acting on our behalf. For Google, this shift represents both a challenge and a warning. As users explore AI-driven browsing, traditional search models and advertising ecosystems may begin to lose their long-standing dominance.

Security, transparency, and trust will determine who leads this next phase. The vulnerabilities discovered in early AI browsers are a reminder that innovation must move hand in hand with robust protection and accountability.

Change is coming, and it is coming fast. Venn CEO David Matalon notes that we are seeing an interesting shift in browser usage among remote employees and contractors. The use of novel, non-traditional browsers that are not Chrome, Edge, or Safari has increased by 14% over year, driven largely by the promise of AI-powered productivity.

This momentum suggests that the move toward AI-first browsing is not a passing trend but the beginning of a fundamental transformation in how people search, work, and interact online. The question is no longer whether users will adopt AI browsers, but how rapidly they will redefine the experience of the web itself.