Verdict
Dia is a tidy Chrome-based browser for Mac and, since October 2026, Windows, with an assistant that pulls together tabs, Gmail, Slack and calendars. TechRepublic rates it best for work spread across several apps, but its agent does little clicking on the web and the AI now needs a plan from $20 a month. user reviews reaction to the August 2026 paywall was hostile, though the browser stays free without AI.
Best for
Mac users who want a morning briefing from email, calendar and tabs
Skip if
Phone users, or anyone wanting an agent that books and buys
Key facts
- Category
- AI that does tasks for you
- Made by
- The Browser Company of New York (owned by Atlassian)
- Based in
- United States
- Launched
- 2025
- Works on
- Mac, Windows
- In the UK
- Yes
- Price from
- $20 a month
- Free plan
- Browser free with no AI features; 14-day free trial of the top plan for new users
Pricing
| Plan | Price | Billed |
|---|---|---|
| Better Answers | $10 | month |
| Better Days | $100 | month |
What it does
- a web browser with an AI assistant that answers questions about any page
- chats with context from Slack, Gmail, Notion, Outlook, GitHub, Google Calendar and Figma
- profiles, tab groups, split view and picture-in-picture
- blocks ads and trackers
- Better Days adds a daily morning brief, meeting prep and reports
What people say
Mac users and designers praise the clean interface and the Morning Brief, but August 2026's move to paid AI plans drew an 86-comment backlash in user reviews, and the Windows launch thread in user reviews was dominated by complaints about the compulsory account and privacy policy. There are no store ratings to compare.
“the Dia browser "morning brief" blew me away this morning. wasn't merely a summary of my calendar, it incorporated and annotated ideas from others' emails about the meetings”
Post on X, 22 May 2026 · source
“I know Arc burned everyone But the truth is, the Dia browser absolutely slaps.”
Post on X, 4 August 2026 · source
“For the same money on claude you get access to extensive agentic capabilities. In dia you get a chat bot and a couple more gimmicks.”
Individual user review, 19 August 2026 · source
“Was going to try it out but I just can’t be bothered to make an account for a browser, and it won’t even accept protonmails email masks.”
Individual user review, 7 October 2026 · source
“Dia is super nice to use without AI features”
Individual user review, 19 August 2026 · source
Press reviews
- TechRepublic 2026-09-30
Best for cross-app work; synthesises context from Gmail, Slack, Notion and tabs rather than automating the web, with agentic browsing rated 'Limited'.
- The Verge 2025-12-03
Dia and Comet did best at finding emails worth answering, but Dia gave only 15 minutes of a requested video transcript and none of the five AI browsers lived up to the hype.
Privacy
- Trains on your data
- Some content data is used to improve Dia by default, not tied to the account and kept 30 days; AI partners (Anthropic, OpenAI, Gemini, Azure, AWS) are contractually barred from training on it
- Opt-out
- Turn off content data sharing in Dia Settings (privacy policy: 'unless you opt out'); Memory and Sync can also be switched off
- Retention
- Conversations, history, bookmarks and files stored encrypted on the device by default; content data for improvement deleted after 30 days; account data kept while the account exists; Sync is end-to-end encrypted
- Incidents
- Browser spoofing flaws CVE-2025-13132 and CVE-2025-15032 fixed in later versions, plus a High-severity (CVSS 7.5) issue fixed in 1.6, all listed in Dia's security bulletins. No data breach or regulatory action found in searches of HN, user reviews and news.
- Age limit
- 18+ (privacy policy and terms)
Official videos
FAQ
Is Dia free?
The browser is free but has no AI features without a plan. AI plans cost $20 or $100 a month, and new users get a 14-day trial.
Is Dia available on Windows or iPhone?
It runs on Mac and, since October 2026, Windows. There is no iPhone or Android app.
Does Dia work in the UK?
Yes. It downloads from diabrowser.com, and its privacy policy names a UK GDPR representative in London.
Does Dia use my data to train AI?
Its AI partners are barred from training on Dia data. Dia itself uses some content to improve the product by default, keeps it for 30 days and lets users turn this off in Settings.
Dia or Arc?
Both come from The Browser Company, which stopped developing Arc to build Dia. individual reviewers who prefer Arc's features say free Dia feels like an unfinished Arc.
Scores are based on published evidence, not lab tests. How we score.
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