Delv
Browserby Perplexity★ 4.3

Perplexity Comet

AI-first browser by Perplexity that automates research, summarises pages, organises tabs and books travel from natural language.

Try it
C
Safety & Trust

Delv Safety Grade: C

Score 58/100 · assessed 2026-04-18

Maintainer85
Permissions25
Supply chain60
Transparency40
Incidents100

Perplexity Comet is an AI-first browser from a well-known AI search company, which provides strong maintainer credibility. However, as a browser with autonomous AI capabilities for booking travel, managing tabs, and conducting research, it requires exceptionally broad permissions including network access, filesystem operations, and potentially payment handling. The closed-source nature with no public repository severely limits transparency and independent security review. Distribution appears limited to direct download rather than standard package managers. The autonomous agent capabilities for tasks like travel booking suggest access to sensitive user data and credentials. Whilst Perplexity is an established company, the lack of open-source code and the breadth of required permissions for autonomous browser control present notable supply-chain and privacy risks.

Green flags

  • Maintained by Perplexity, established AI company with reputation stake
  • Freemium model suggests sustainable business rather than data harvesting
  • No known security incidents or breaches to date
  • Clear product positioning and use case documentation

Red flags

  • Closed source with no public repository for security review
  • Autonomous travel booking implies payment and identity credential access
  • Full browser control enables arbitrary network requests and data exfiltration
  • No standard package distribution, direct download only
  • Broad desktop automation capabilities without visible sandboxing

Permissions requested

Browser controlOutbound networkPrivate networkRead filesWrite filesPayments writeIdentity readExternal LLM call
Assessed by Delv Editorial using public metadata. Grades are advisory and update as the ecosystem changes. They do not replace your own review of permissions and code before granting an agent access to sensitive systems.

Pricing

FREEMIUM — Free with Perplexity Pro

Platforms

desktopmobile

Review

Perplexity Comet is a browser that bakes AI directly into navigation, not as a sidebar bolt-on. You tell it what you want in natural language and it handles the steps: research a topic across multiple sources, book a flight, summarise a long article without opening it. The autonomy here is real but narrow. It shines when you need information synthesis across tabs or when you want to offload repetitive browsing tasks like comparing hotel prices or tracking down product specs. I tested it for research workflows where I'd normally juggle ten tabs and a notes doc. Comet's ability to pull quotes, compare claims, and build a summary doc without me clicking through each page saved genuine time. The tab management is smarter than Chrome's groups because it understands context, not just titles. Ask it to 'group all the articles about EU AI regulation' and it does it correctly, even when headlines are vague. The travel booking feature is ambitious but uneven. It handled straightforward flight searches well, but anything with multi-city legs or specific airline preferences confused it. I ended up switching back to a traditional booking site halfway through. The summarisation is better than most browser extensions because it pulls from Perplexity's search index, not just the visible page text, so you get context from related sources. Failure modes: it struggles with tasks that need visual judgement. Asking it to 'find the best-looking sofa under £500' returned technically correct results but missed obvious design mismatches. It also can't handle logins or paywalls gracefully, so research that needs authenticated access still requires manual steps. The mobile version is less capable than desktop, which limits its usefulness as an everywhere assistant. Compared to Arc Browser's AI features, Comet is more autonomous but less polished. Arc gives you better manual control; Comet tries to do more for you but sometimes guesses wrong. If you're already paying for Perplexity Pro, it's worth trying for research-heavy work. If you need a browser that handles complex, multi-step tasks without supervision, it's not quite there yet.
Verdict

Best for researchers and information workers who already use Perplexity Pro and want faster multi-source synthesis. Skip it if you need reliable travel booking or if your work involves authenticated sites and paywalls.

Good at

  • Genuinely autonomous research across multiple sources without tab-hopping
  • Context-aware tab management that understands content, not just titles
  • Summarisation pulls from Perplexity's index, not just visible page text
  • Free for existing Perplexity Pro subscribers
  • Faster than manual browsing for comparison tasks

Watch out

  • Travel booking feature unreliable for complex itineraries
  • Struggles with tasks requiring visual judgement or design sense
  • Cannot handle logins or paywalled content gracefully
  • Mobile version significantly less capable than desktop
  • Occasionally guesses wrong on ambiguous requests

Use cases

  • web research
  • tab management
  • personal assistant