AI browsers offer the deepest integration but require you to switch browsers and trust a young product with your whole browsing life. AI extensions give you most of the benefit inside Chrome with almost no switching cost. In 2026, with one AI browser already discontinued, extensions are the lower-risk choice for most people.
The two approaches
An AI browser is a complete web browser with an assistant built into its core: Perplexity Comet, Opera Neon, Dia, Fellou, Genspark, and features such as Gemini in Chrome and Copilot Mode in Edge. An AI extension adds an assistant to an existing browser: Hark, Claude in Chrome, Monica, Sider and others.
What AI browsers do better
- The assistant can see and organise all your tabs, history and search.
- AI is available in the address bar and the new-tab page, not only a side panel.
- Some run tasks in the background or on a schedule.
- Some are free (Comet) or bundle extras like ad blocking and VPN (Neon).
What AI extensions do better
- No switching. Your bookmarks, passwords, profiles and other extensions stay put.
- Low risk. If the product disappears, you uninstall it. When OpenAI retired its Atlas browser on August 9, 2026, users had to move everything again.
- Narrow permissions. A well-built extension reads a page only when you ask.
- Works at work. Many companies standardise on Chrome and allow approved extensions but not alternative browsers.
Side by side
| AI browser | AI extension | |
|---|---|---|
| Setup | Install a browser, import data, change habits | One click in the Chrome Web Store |
| Integration depth | Very deep | Side panel and page |
| If discontinued | Migrate everything | Uninstall |
| Platforms | Varies; some are Mac-only | Wherever Chrome runs |
| Typical price for agents | Free to about $20/month | Free to about $20/month |
How to choose
Choose an AI browser if you enjoy new tools, want AI woven into every part of browsing and are happy to migrate. Choose an extension if you want an agent for specific jobs — email, forms, bookings — without touching the rest of your setup. You can also do both: keep Chrome with an extension for daily work and try an AI browser on the side.
If you choose the extension route, compare Hark vs Claude in Chrome, or see how Hark stacks up against the browsers: Comet, Opera Neon, Dia.