OpenAI folded ChatGPT Atlas into ChatGPT Work in early July. The pitch (a browser wrapped around ChatGPT with agent tools that could open tabs, summarise pages, and stitch results together across a research session) is not disappearing. It is moving into a subscription-only enterprise product. If Atlas was your daily driver and Work is not on your budget, the alternative browsers have caught up.
We tested seven ChatGPT Atlas alternatives on Windows, macOS, and Linux. Some (Comet, Dia, SigmaOS) are direct agentic-browser competitors; others (Arc, Brave, Zen, Opera Neon) are more classical browsers with strong AI side-panels. Prices are July 2026.
Quick comparison
| Browser | Best for | Free plan | Starting price | Standout feature |
|---|---|---|---|---|
| Perplexity Comet | Research-first agentic browsing | Yes | $20/mo Pro | Sonar model chained across tabs |
| Dia | Elegant, minimalist agent | Yes | Waitlist | The Browser Company’s replacement for Arc |
| Arc | Command-bar navigation | Yes | Sunset (still functional) | The interface Atlas was competing with |
| Opera Neon | Native agent + code sandbox | Yes | $19.99/mo Pro | Runs an in-browser sandbox for agent code |
| Brave Leo | Privacy-preserving AI side-panel | Yes | $15/mo Premium | On-device model option (Llama, Mistral) |
| SigmaOS | Tab workspaces and AI extract | Yes | $8/mo Pro | Best-in-class tab groups + shortcuts |
| Zen Browser | Open-source privacy Firefox fork | Yes | Free | The daily driver for the AI-sceptics |
Why Atlas people are looking
The Work tier isn’t $0. Atlas was free with Plus; Work is a business SKU that starts at $30 per user per month.
Consumer feature parity vanished. Web Search Grounded, Deep Research, and the built-in Codex sandbox are all Work-only now.
Cross-tab agents that survive across sessions are gone. Atlas’s “keep researching this in the background” workflow was the killer feature; Work has it, the free ChatGPT app does not.
The alternatives
Perplexity Comet, Best for research-first agentic browsing
Perplexity Comet was the first Atlas-shaped browser and it stayed ahead of the pack on cross-tab research. The Sonar model chains searches across pages, keeps a running scratchpad of what it has learned, and cites sources by default in the panel view. If Atlas’s summarise-across-tabs habit was the reason to use it, Comet is the closest one-for-one replacement.
Where it falls short: the free tier throttles agentic actions after a few queries. Sustained research needs Pro.
Pricing: free, plus $20/month Pro (unlimited Sonar queries) and $200/month Max (deeper agent capabilities).
Migrating from Atlas: import bookmarks via HTML export. Password-manager sync is native (1Password, Bitwarden). Chat history does not import; Perplexity is treating Atlas history as vendor-locked.
Download: comet.perplexity.ai
Bottom line: the direct replacement. If Atlas + free tier was your setup, Comet + free tier keeps most of it.
Dia, Best for a Browser-Company-tier agent UI
Dia is what The Browser Company built after they told Arc’s community they were winding down active development. It is deliberately minimalist: no sidebar, no vertical tabs by default, and a URL bar that doubles as the agent prompt. It leans on OpenAI and Anthropic models rather than shipping its own.
Where it falls short: still invitation-only. The waitlist takes a few weeks.
Pricing: free during beta. Paid tier terms announced later this year.
Migrating from Atlas: Chromium-based (Blink), so passwords, extensions, and bookmarks import from anything Chrome-family.
Download: diabrowser.com
Bottom line: the design-forward pick. Get on the waitlist now if UI polish is what pulled you to Atlas.
Arc, Best for command-bar users still hoping the sunset delays
Arc is officially in maintenance, but the app still updates for security and stays fully functional. The command-bar (Cmd+T opens a Spotlight-style palette that takes URLs, tabs, bookmarks, notes) is still the fastest way to move around a browser, and Arc Max’s AI shortcuts do most of what a light-weight AI panel does elsewhere.
Where it falls short: the AI Max features are frozen at pre-sunset capability. Do not expect new models.
Pricing: free. Arc Max is included in the free tier.
Migrating from Atlas: import from Chrome or Edge. Extensions are Chrome-compatible.
Download: arc.net
Bottom line: if you liked Atlas because it read differently from Chrome, Arc still gets you 90% there. Just do not build long-term muscle memory on a sunsetting app.
Opera Neon, Best for native agent plus a real sandbox
Opera Neon relaunched in 2025 as an agent-first browser separate from Opera One. The killer feature is a sandboxed code environment that the agent can write into: ask it to build a small tool, and it runs in a browser tab you can watch. That is closer to what ChatGPT Work is promising than any other browser here.
Where it falls short: the sandbox is slow. Long agent runs take minutes.
Pricing: free tier with usage caps. Pro $19.99/month.
Migrating from Atlas: Chromium base with a proper Chrome-import wizard. Passwords and bookmarks come across cleanly.
Download: operaneon.com
Bottom line: the “agent-that-builds-things” pick. Slower than Atlas, more capable per run.
Brave Leo, Best for privacy-first AI browsing
Brave Leo puts the AI panel in a browser that does not phone home. Leo defaults to a mix of Anthropic and Mistral models running through Brave’s own routing layer, and Premium adds larger context windows and access to a couple of hosted frontier models. The stand-out feature is the on-device model option: Llama 3, Mistral, and Qwen quants run locally with no network round-trip.
Where it falls short: the panel does not do cross-tab research. It reads the current tab; that is it.
Pricing: free with Leo. Premium is $15/month.
Migrating from Atlas: Chromium base. Extension parity with Chrome. Import wizard handles the standard set.
Download: brave.com · brave.com/leo
Bottom line: the privacy pick. Give up cross-tab agents, keep the AI panel and lose the tracking.
SigmaOS, Best for tab workspaces plus AI extract
SigmaOS predates the agentic-browser trend and did tab-workspace management before Arc made it cool. The AI features were added over 2024-2025 and cover the basics: summarise, extract, translate, ask about the current tab. It is not an agentic browser; it is a productivity browser with an AI side-panel.
Where it falls short: Mac and iOS only. No Windows or Linux client.
Pricing: free tier is generous. Pro $8/month, or $96/year.
Migrating from Atlas: Chromium base. Bookmark and password import works. Chat history is vendor-locked in either direction.
Download: sigmaos.com
Bottom line: if you are on a Mac and Atlas’s workspace-like habit was the appeal, SigmaOS is a better productivity fit than any of the pure agentic-browser picks.
Zen Browser, Best for people who want a browser without an AI agenda
Zen is a Firefox fork that keeps the vertical-tab, workspace-first ideas Arc introduced without pushing agents into every corner. There is no built-in AI panel. Extensions can add one (Sider, Merlin, Ori), and the browser itself stays out of the way. If Atlas felt too eager, Zen is the counter-argument.
Where it falls short: no first-party AI. Everything is add-ons.
Pricing: free. Open-source (MPL).
Migrating from Atlas: Firefox import wizard. Extensions are Firefox-family; Chrome extensions do not work.
Download: zen-browser.app
Bottom line: the daily driver for anyone who liked Atlas’s tab UI but disliked the agent-first push. Add an AI extension if and when you want one.
How to choose
Pick Comet if research across tabs was the workflow.
Pick Dia if the reason you loved Atlas was the interface.
Pick Opera Neon if you want the agent to build things.
Pick Brave Leo if privacy was Atlas’s weak spot for you.
Pick SigmaOS if you are on Mac and tab workspaces mattered more than agents.
Pick Zen if the agents were the reason you got tired of Atlas.
Stay on Arc short-term if the command bar is muscle memory, but plan the migration.
FAQ
Is ChatGPT Atlas really gone? The consumer product is discontinued. The Atlas features live on inside ChatGPT Work, which is a Business/Enterprise SKU at $30 per user per month.
Which Atlas alternative has the closest UI? Dia. The Browser Company designed both.
Which is best for research? Perplexity Comet. Cross-tab chaining is what Sonar was built for.
Can I keep my Atlas chat history? No. OpenAI let users export prompts, but no third-party browser can read Atlas conversation format. Start fresh.
Are any of these fully open-source? Zen (Firefox fork under MPL) is open-source. Brave publishes most of its code under MPL/Apache but the Leo backend is proprietary.
