Skip to content

Comet vs Dia

A side-by-side comparison of Comet and Dia, two Assistant tools, drawn from Ignaite's continuously-verified listings.

Compared from listings verified as of

Comet

Assistant

Perplexity's AI browser with a sidebar assistant that acts across your tabs.

View Comet

Dia

Assistant

An AI-native web browser with chat and skills built into the URL bar.

View Dia

At a glance

Feature comparison of Comet and Dia
AttributeCometDia
CategoryAssistantAssistant
PricingFREEMIUMFREEMIUM
LicenseProprietaryProprietary
DeploymentLocalLocal
Platforms (differs)Windows, macOS, Android, iOSmacOS
Model support (differs)Multi-model—
Vendor (differs)PerplexityThe Browser Company

The honest brief

Comet

The only major AI browser free across desktop and mobile, with an assistant that can act on open tabs, email, and calendar from the sidebar.

  • Free on desktop and mobile
  • Sidebar assistant acts across tabs
  • Chromium base imports Chrome data
  • Deep Research and voice built in
  • Closed source
  • Frontier models need Pro or Max
  • Publisher content costs $5/month
  • Assistant needs broad data access

Dia

From the makers of Arc; AI lives in the address bar aware of your open tabs and history, not a bolted-on chatbot.

  • AI baked into the URL bar
  • Tab- and history-aware context
  • Reusable 'skills'
  • Free tier for light use
  • macOS only
  • Closed source
  • Pro at $20/mo to lift AI limits
  • Young product, evolving feature set
Comet detailsDia detailsAll Assistant apps