New Delhi: The Browser Company, best known for its experimental browser Arc, has now launched Dia, a new AI-first browser designed to work more like a smart assistant than a traditional web browser. While Arc focused on reimagining browser design with vertical tabs and creative layout tricks, Dia is more about simplicity, speed, and making AI feel native to your daily browsing.

Dia isn’t just a redesign. It acts like an intelligent sidekick that quietly watches what you’re reading or shopping and helps you figure things out, right there in the browser. From summarising web pages to pulling data from tabs and chat history, the assistant is trained to understand context and respond in a human-like way.

A chat-first browser, not just a search box

Dia brings a familiar interface, think Chrome, but a bit more refined with smoother animations and thoughtful design. The real magic sits in the sidebar. A chatbot, similar to ChatGPT, is baked into the browser. It can look into your active tab, all open tabs, and even your browsing history.

You can ask it questions like “What did I search on that article three tabs back?” or “Can you list all the laptops I checked out earlier?” It pulls context from everywhere and returns responses instantly in the chat. The chat interface also lets users drag summaries, compile notes, and extract key information without having to leave the tab or open another window.

What’s different from Arc?

Although The Browser Company built both Arc and Dia, the two serve different kinds of users. Arc was more about changing how a browser looks and works, especially for people who enjoy organising tabs and layouts. Dia, on the other hand, is about cutting clutter. It uses horizontal tabs, adds faster navigation, and puts all the AI features upfront.

While Arc’s interface often felt playful and experimental, Dia feels focused. It’s still early days though. The version available now is only for Arc members and only on Mac. To use it, users need to sign up at diabrowser.com/download using their Arc email and set a separate password.

What Dia can do today

The AI inside Dia can already do plenty, but it’s not built for automation. For now, its strength lies in summarising content, pulling info from web pages, and organising research. The company says Dia is designed for people who want fast answers, smooth design, and an AI that quietly supports instead of taking control.

According to a post on X, “Dia is now available to Arc members… You can use different passwords for Arc and Dia!” All AI features run on a default model and may get more updates as the browser evolves.

The shift from Arc to Dia shows how AI is now becoming the front door of how we browse, not just a layer on top. And with tools like Dia, the browser is no longer just a window to the internet, it might just become your smartest companion on it.