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Reviewed comparison · verified 2026-09-16

CometvsDiain 2026

Both put an assistant at the centre of the browser; Comet leans on Perplexity's answer engine, while Dia is closer to a writing and tab-context companion.

33 documented facts compared 17 differ 16 identical
BrowserPedia mascot comparing browsers on balance scale

Head-to-head: Comet versus Dia

Comet

Perplexity AI · United States

Dia logo

Dia

The Browser Company · United States

Comet: Perplexity's Chromium browser built around an answer engine and an assistant that can carry out multi-step tasks in the page.

Dia: An early Chromium-based browser experiment that places AI-assisted tasks inside the browsing workflow.

Key facts, on one axis

  • Yes
  • Partial
  • No
Chromium
Engine identical
Chromium
Unknown
Blocks trackers identical
Unknown
Unknown
Anti-fingerprinting identical
Unknown
Built in
Native ad blocking
Unknown
Supported
Chrome Web Store
Partial
Built in
Sync across devices
Minimal or opt-in
Perplexity (Google on iOS)
Default search
Configurable
macWinLinAndiOS
Platforms 4 vs 0 of 5
macWinLinAndiOS
1
Privacy & tracking /4
0
2
Extensions /4
1.5
6
Workflow & tabs /11
7
4
Platforms /5
0.5

A count of the capabilities each record documents in that category - half a point for partial support. It is a shape, not a score: BrowserPedia does not rank browsers.

Comet profile Full records Dia logoDia profile

What actually differs

See all 33 facts

  • Native content blocking

    Only in Comet · Privacy & tracking

  • Chrome Web Store

    Only in Comet · Extensions

  • Dia logo

    Vertical tabs

    Only in Dia · Workflow & tabs

  • Dia logo

    Reader mode

    Only in Dia · Workflow & tabs

  • Sync across devices

    Only in Comet · Workflow & tabs

  • macOS

    Only in Comet · Platforms

Comet vs Dia: every documented fact

Each row is a field from the two browser records. Open a row to read the documented note and its source. Categorical rows carry no colour, because one engine is not better than another.

33 documented facts · 17 differ · 16 identical

Fact
Comet
Dia logoDia

Privacy & tracking

built in
1/4
0/4

Extensions

built in
2/4
1.5/4

Workflow & tabs

built in
6/11
7/11

Platforms

built in
4/5
0.5/5

Foundation

Comet vs Dia: common questions

Do Comet and Dia use the same browser engine?
Yes. Comet and Dia both render with Chromium, so page rendering and web compatibility are largely the same. The differences between them are in defaults, bundled features and who ships the updates.
Which blocks trackers by default, Comet or Dia?
Neither Comet nor Dia documents tracker blocking enabled by default.
Can Comet and Dia run Chrome extensions?
Comet documents Chrome Web Store support; Dia only partially.
Does Comet or Dia have vertical tabs?
Dia documents built-in vertical tabs; Comet does not.
What platforms do Comet and Dia run on?
Comet is documented on macOS, Windows, Android and iOS. Dia is documented on macOS.
Is Comet or Dia still actively developed?
Comet is active and Dia is active, as of the profile verification dates on this page.

Evidence sources

BrowserPedia does not rank browsers by a universal score. The verdict is an editorial interpretation of the sourced facts above.

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