Dia
The Browser Company's AI browser — a chat bar that reads your tabs and writes in context.
What is Dia?
Dia (from the makers of Arc) replaces the traditional address bar with a chat interface that already knows what's open in your tabs. Ask it to compare, summarise, or write using the context of your browsing session — no copy-pasting URLs into a chatbot.
Dia grew out of Arc's design language but starts from a different premise: the chat box is the browser, not a feature bolted onto one. It reads your open tabs, history, and (with permission) email to answer questions in context — "what did that article say about pricing" works without re-finding the article. The Browser Company shifted its focus from Arc to Dia through 2025–2026.
Key features
- Chat bar with full open-tab context
- "Skills" — reusable saved prompts tied to specific sites
- History and email-aware answers (opt-in)
- Clean, Arc-style tab and workspace design
- Mac-first, Windows in progress
Pros
- Most naturally "chat-first" browsing feel of the three
- Skills feature genuinely saves repeated prompt-writing
- Design quality carries over from Arc's best ideas
Cons
- Smaller company, less long-term guarantee than OpenAI or Perplexity
- Windows version lags behind Mac
- No dedicated agent mode yet — reads and writes, doesn't click for you
Best for
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Alternatives to Dia
Perplexity Comet ★
An agentic AI browser that browses, compares, and completes tasks for you — not just search.
ChatGPT Atlas
OpenAI's AI browser — ChatGPT built into every tab, with an agent mode that can act for you.