Comet Overview
This Comet review looks at Perplexity’s agentic AI browser as it stands in 2026 — a browser with a built-in assistant that doesn’t just answer questions but actually does things for you: triaging your inbox, booking flights, filling forms, and summarizing everything you have open. After OpenAI shut down its Atlas browser in August 2026, Comet is the last major agentic browser standing.
What is Comet?
Comet is Perplexity’s AI-native web browser, built on Chromium so every Chrome extension you rely on works from day one. Its core is a persistent assistant sidebar that stays context-aware of your open tabs. Instead of copying URLs into a chatbot, you ask the assistant to work with what’s already in front of you — compare prices across the tabs you opened, summarize a research thread, or draft a reply to the email you are reading.
The agentic layer is what separates Comet from Chrome with a Perplexity extension. Give it a task like “find me the cheapest direct flight to London next Friday and hold the option,” and it browses, clicks, and completes the steps on your behalf, showing its work as it goes. It also supports multi-tab queries: ask one question and have it answered from several tabs at once, plus workspaces with session snapshots so research projects survive restarts.
Comet launched in 2025 as a $200/month Max exclusive, then went free worldwide in October 2025. It is available on Windows, macOS, Android, and iOS (the iOS app arrived in March 2026), and it includes Comet Plus, a premium publisher-content bundle that shares revenue with participating publishers.
How Comet Works
Day to day, Comet feels like Chrome with a very capable colleague sitting in the sidebar. The assistant reads the pages you have open and answers with citations, just like Perplexity search, but it can also take actions: clicking through a checkout flow, extracting data from a dashboard, or filling a long application form while you watch or look away.
For research workflows this is genuinely powerful. Open five competitor pricing pages, ask the assistant to build a comparison table, and it will. Ask it to monitor a tab and summarize the changes, or to draft an email quoting figures from another tab, and it handles the cross-tab context automatically. Tasks run in the background with progress you can check, and you can interrupt or redirect them mid-flight.
Pricing: the browser itself is free with daily Pro Search limits. Comet Plus is $5/month for premium publisher content (bundled with Pro and Max). Perplexity Pro at $20/month raises the agentic limits substantially, and Max at $200/month unlocks the heaviest usage. In practice, daily agentic use needs Pro — the free tier throttles agents aggressively.
Who Should Use Comet?
Comet suits heavy researchers, journalists, analysts, and anyone who lives in dozens of tabs. If your work involves comparing sources, extracting data from pages, or repeating browser chores (expense reports, bookings, form filling), the agentic layer pays for itself quickly. Chrome users can migrate in minutes since extensions and passwords carry over on the Chromium base.
It is less compelling if you mostly read one page at a time and rarely ask questions while browsing — a standard browser plus a chat tab does that fine. Privacy-sensitive users should also pause: your browsing feeds Perplexity’s ecosystem, and while the company states its policies, the product is fundamentally an observer of everything you do online. Enterprises with strict data policies will want the governance story before rolling it out.
Our Verdict on Comet
Comet earns a 4.0 in this Comet review: it is the most capable agentic browser available in 2026, and the only one left standing after rivals folded. The free launch was the right call, but the free tier is a teaser — real users land on the $20/month Pro plan. Heavy memory use and the category-wide prompt-injection problem are genuine caveats, not footnotes.
If you already live inside Perplexity’s ecosystem, switching is nearly frictionless. For a non-browser agentic alternative, Perplexity AI itself remains the search-layer answer. Either way, Comet defines what the browser wars of 2026 are about: not rendering pages faster, but doing your errands while you watch.
Key Features
- Agentic assistant that browses, clicks and completes tasks on your behalf
- Persistent sidebar aware of your open tabs and page context
- Multi-tab queries with instant cited summarization
- Workspaces with session snapshots and tab management
- Chromium backbone with full Chrome extension compatibility
- Background task execution with interrupt and redirect controls
- Comet Plus publisher revenue-sharing news bundle
Comet Pricing
| Plan | Price |
|---|---|
| Free | $0 |
| Comet Plus | $5/mo |
| Pro | $20/mo |
| Max | $200/mo |
Last updated on September 22, 2026 — always confirm on the official site.
Comet Pros & Cons
✓ Pros
- Only major agentic browser left standing after ChatGPT Atlas shut down
- Genuinely free core product after the $200/mo Max-only launch
- Chromium base means zero migration friction for Chrome users
- Deep tab-aware research workflows hard to replicate with sidebar tools
- Backed by Perplexity's fast-growing 15M+ user ecosystem
✕ Cons
- The free tier is heavily throttled — Pro Search caps, rate-limited agents and daily memory resets make the $20/mo Pro practically mandatory
- A prompt-injection vulnerability was disclosed shortly after launch — an unsolved risk across the whole agentic-browser category
- Your browsing behavior feeds Perplexity's models, which privacy-conscious users should weigh before switching
Comet FAQs
Is Comet browser really free in 2026?
How much does Comet Plus cost?
Does Comet work with Chrome extensions?
Is Comet safe to use with personal data?
What are the best Comet alternatives?
Best Comet Alternatives
Viktor
★★★★☆Viktor review (2026): Zeta Labs' AI employee that lives in Slack, learns your workflows, and runs tasks end to end — features, pricing, and honest verdict.
guilds.run
★★★★☆guilds.run reviewed for 2026 — open-source multi-agent teams with shareable recipes. Features, free pricing model, real pros and cons, and our verdict.
Agibot
★★★☆☆Agibot review (2026): an always-on personal AI agent for Mac that works after you close the window — $0 forever with your own API key. Features and honest verdict.
ChatDev
★★★★☆ChatDev reviewed for 2026 — the free open-source AI software company. How its agent team codes, what it gets right, and where human review is essential.