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Field notes from a little way ahead Week 45 · 2 Nov 2026 · Still early
Agent Index › Browser › Comet
Browser · general · Standalone · live

Comet

Perplexity's AI browser, with an assistant in every tab that can answer, shop and run errands in the background.

By Perplexity · launched 2025-07-09 · last checked 2026-11-01

At a glance
Autonomy
3/5
Multi-step, with approval

Why 3: its assistant acts on the page and background assistants run several tasks, while the Email Assistant only drafts replies, so key outputs come back to you.

The findings

What it does. Comet launched on 9 July 2025 for top-tier subscribers and became free to download on 2 October 2025, followed by Android in November 2025 and iOS in March 2026. Its assistant can act on the page you are on, background assistants can work on several tasks at once, and an Email Assistant for Max subscribers schedules meetings and drafts replies.

Where it falls short. It became security researchers' favourite target. Brave called indirect prompt injection "a systemic challenge facing the entire category of AI-powered browsers", and showed hidden text on a web page could take over Comet's assistant.

Our score
4.5/10
Read the review →

What it can do

browseemailcalendarpurchases

Price: Free; some assistant features, such as the Email Assistant, need a Max subscription. · Where: Worldwide on Windows, macOS, Android and iOS. · Surfaces: browser, app

Incidents

  • 2025-08-20 Brave showed that instructions hidden in a Reddit comment could hijack Comet's assistant while it summarised the page. Source
  • 2025-10 LayerX Security described "CometJacking", an attack that could extract a user's data to an attacker's server; Perplexity said it had found and patched the issue. Source
  • 2026-08 The Ninth Circuit vacated a March 2026 injunction that had barred Comet's agent from shopping on Amazon, finding that on the current record the user, not Perplexity, was accessing Amazon's systems; the case continues. Source

Closest fiction

Robot & Frank — The loophole: a machine that does whatever the page in front of it says.

Related browser agents

History

  • 2026-11-01 Added to the index.

Sources

  1. Comet (browser) Wikipedia
  2. The internet is better on Comet Perplexity, 2025-10-02
  3. Agentic Browser Security: Indirect Prompt Injection in Perplexity Comet Brave, 2025-08-20
  4. Unseeable prompt injections in screenshots: more vulnerabilities in Comet and other AI browsers Brave, 2025-10
  5. US court overturns Amazon injunction against Perplexity AI Retail Insight Network, 2026-08-05

← All agents in the index · Autonomy is rated on what the product does today, on a 1–5 scale. Every fact links to a source.