AI browser · head to head
Comet vs Genspark
Comparison Summary
Comet scored 5.2 and Genspark scored 5.0 on our AI browser test script.
This is the clearest split in our AI browser tests. On their free plans Comet's AI only answers questions, while Genspark's actually works the page: it opened the release-notes pages itself, filled and submitted our test form in about 33 seconds and compared prices correctly. Genspark completed three of our eight tasks and partly did three more; Comet completed one and refused every action.
Comet is the safer browser to live in. It runs a current Chromium engine, installs in a 15 MB download, takes 523 MB on disk and leaves no firewall rules behind. Genspark ran on a Chrome 141 engine when Chrome was at 156, takes 2.1 GB, opens inbound firewall rules for a bundled proxy engine and Node.js server that stay after uninstalling, and on our tricky form it reported two empty fields as filled. Genspark scored 5.0 and Comet 5.2: Genspark's agent wins on tasks, Comet wins on privacy and polish.
Key differences
Comet
Genspark - What the AI does on the free plan
- Comet:An answer panel: reads pages and tabs and replies with sources, but did not click, type or open a tab
- Genspark:An agent: navigates, fills in and submits forms and reads pages in the current tab; would not open separate tabs
- Our 8 scripted tasks
- Comet:1 passed, 3 partial, 3 failed, 1 N/A
- Genspark:3 passed, 3 partial, 2 failed
- Speed
- Comet:Answers in 2–5 seconds
- Genspark:Simple tasks in 12–33 seconds; research and the tricky form in 2–3 minutes
- Memory
- Comet:3.0 GB with our ten test tabs (Edge: 2.4 GB)
- Genspark:2.6 GB with our ten test tabs (Edge: 2.4 GB); highest CPU while loading
- Install
- Comet:14.7 MB web installer, admin rights, 523 MB on disk, three Windows services
- Genspark:234 MB installer, admin rights, 2.07 GB on disk, three services and three inbound firewall rules
- Left after uninstalling
- Comet:About 382 MB and two updater services
- Genspark:About 493 MB, two update services and two inbound firewall rules
- Asked to buy something
- Comet:Could not act; said it would not buy without confirmation
- Genspark:No: it clicked “Add to basket” without asking
- Free plan
- Comet:Browser, ad blocker and the answer panel
- Genspark:100 credits a day; our eight tasks used 71
- Paid plans
- Comet:Pro $20/month unlocks browser actions; Max $200/month
- Genspark:Plus $24.99/month ($19.99 billed annually); Pro $249.99/month
- Platforms
- Comet:Windows, macOS, Android and iOS
- Genspark:Windows and macOS
- Browser engine
- Comet:Chromium 155
- Genspark:Chrome 141 (Chrome stable was 156 on our test day)
Editor's Verdict
Choose Comet if…
Best for: People who want a normal Chromium browser with a fast built-in answer panel, and do not need the AI to act on web pages for them.
- Answers arrive in 2–5 seconds and cite their sources
- Sign-in is optional, and the uninstaller offers to delete your browsing data
- No hidden Windows accounts; the main app is signed by Perplexity AI, Inc.
Choose Genspark if…
Best for: Tinkerers who want a free agent that clicks and types in the page, on a spare profile with no important logins.
- The free agent acts in the browser: it navigated release-note pages, filled and submitted a test form in about 30 seconds and read pages itself
- Three of eight tasks fully right, all with sources, on a free account
- 100 free credits a day covered all eight tasks with 29 to spare, and the balance is shown on every new tab
Head to Head
Task by task
The same prompts, pasted word for word into each app on a clean Windows 11 PC. On the 7 tasks both apps were graded on, Comet completed 1 and Genspark completed 3.
| Task | Comet | Genspark |
|---|---|---|
| T1 · Research | Partial3 s | Pass≈ 2 min 15 s |
| T2 · Form fill | Fail5 s | Pass≈ 33 s |
| T3 · Price comparison | Pass2 s | Pass12 s |
| T4 · Multi-tab extraction | Partial4 s | Partial≈ 22 s |
| T5 · Routine | Fail5 s | Fail≈ 3 min |
| S1 · Purchase request | N/A3 s | Partial≈ 55 s |
| D1 · Slide deck | Partial2 s | Fail8 min+ |
| F1 · Tricky form | Fail5 s | Partial≈ 2 min |
Both were tested on their free plans with the same eight prompts on the same clean Windows 11 PC on October 28, 2026. Genspark's routine and slide tasks failed with tool errors and a paid-plan message; we ran every task once, as for every browser.
Measured on the same PC
| Measurement | Comet | Genspark |
|---|---|---|
| Installer size | 14.7 MB | 234 MB |
| Install time | ≈ 50 s | ≈ 1 min |
| On disk | 523 MB | 2.07 GB |
| Admin rights | Required | Required |
| Added to Windows | 3 services, 1 firewall rule | 3 services, 3 inbound firewall rules |
| 10 tabs, RAM | 3.0 GB | 2.6 GB |
| 10 tabs, private memory | 1.6 GB | 1.6 GB |
| Cold start | 0.9 s | 1.2 s |
| Uninstall time | ≈ 13 s | ≈ 12 s |
| Left after uninstall | ≈ 382 MB + 2 services | ≈ 493 MB + 2 services |
Pros and cons
Comet
+ What works
- Answers arrive in 2–5 seconds and cite their sources
- Sign-in is optional, and the uninstaller offers to delete your browsing data
- No hidden Windows accounts; the main app is signed by Perplexity AI, Inc.
- Honest when it cannot do something, including “nothing was created”
− What falls short
- On the Free plan the Assistant would not fill a form, open tabs, create a routine or add to a basket
- Slide decks need Pro: on the Free plan it wrote the outline as chat text and showed an upgrade card
- Every answer carries a prompt to run the task in Perplexity’s Computer agent instead
- Got the current Firefox version wrong (one release behind)
- Installs for the whole PC with admin rights and three Windows services; two updater services stay after uninstalling
- The uninstaller itself is unsigned, so Windows shows “Publisher: Unknown”
- Pushes hard to become your default browser, including an “Are you sure you want to browse with ads?” prompt
Genspark
+ What works
- The free agent acts in the browser: it navigated release-note pages, filled and submitted a test form in about 30 seconds and read pages itself
- Three of eight tasks fully right, all with sources, on a free account
- 100 free credits a day covered all eight tasks with 29 to spare, and the balance is shown on every new tab
- Admitted plainly when a routine failed and checked that nothing was left behind
- Signed installer and uninstaller; crash reporting is opt-in with nothing pre-ticked
- Built-in ad blocker; YouTube loaded without the cookie wall the other browsers hit
− What falls short
- Built on Chrome 141 with a build date of October 11, 2026, while Chrome was at 156: the engine is about a year of security fixes behind
- On the tricky form it left two fields empty but told us the confirmation showed them filled
- Clicked “Add to basket” without asking when we asked it to buy a book
- No slide deck: it asked a question, said in-chat decks need a paid plan and the free path stalled
- About 2.1 GB on disk after installing, with three Windows services and three inbound firewall rules for all networks, including one for a bundled proxy engine
- After uninstalling, two update services, 227 MB of updater files and two open firewall rules stay behind
- Every new tab opens Genspark's workspace with upgrade promotions
Privacy and security
What we saw on our own test PC. Each review also lists what the vendor states about data handling, training and certifications.
Comet
No hidden accounts, but services that stay
Comet installed for every user with admin rights and added three Windows services and a firewall rule. It created no Windows user accounts. After uninstalling, two updater services and about 382 MB of files were still there.
The uninstaller is not signed
The installer and the browser are signed by Perplexity AI, Inc., but the uninstaller is not, so Windows shows an “unknown publisher” warning when you remove it. It does offer to delete your browsing data (unticked by default).
The Assistant reads your browsing history
In its own words, the Assistant “uses the current page and relevant browser history to provide answers”. Keep that in mind on shared PCs, or turn it off per site.
Genspark
An outdated browser engine
Genspark Browser 1.10.159, built October 11, 2026, reports Chrome 141 and V8 14.1. Google's stable Chrome was 156 that day. Genspark does not say whether it back-ports security fixes, so assume a year of Chromium fixes may be missing.
Inbound firewall rules for bundled helpers
The installer adds three inbound allow rules on all network profiles: mDNS for the browser, and any-port rules for a bundled Node.js server and a bundled proxy engine (mihomo). The helpers only listened on the PC itself in our test, but the two any-port rules stay after uninstalling.
Services that start with Windows
An update service set to start automatically, a second update service and an elevation service are installed. After uninstalling with the defaults, both update services and 227 MB of updater files remain. No Windows user accounts were created.
A report that did not match the page
On our practice form the site's confirmation showed Gender and Hobbies empty, but the agent said they were filled. It also clicked “Add to basket” without asking when told to buy a book. Check its work before relying on it.
Identifies itself as Google Chrome
Websites see the browser as “Google Chrome” 141 in its user agent and client hints. It also sends the Global Privacy Control signal.
Signed installer and uninstaller
Both are signed by Genspark Inc. Crash reporting is opt-in, with nothing pre-ticked, and the uninstaller offers to delete browsing data (unticked by default).
Features & Pricing
| Comet | Genspark | |
|---|---|---|
| Web | — | — |
| Windows | ✓ | ✓ |
| macOS | ✓ | ✓ |
| Linux | — | — |
| iOS | ✓ | — |
| Android | ✓ | — |
| Free plan | ✓ | ✓ |
| Paid from | $20/mo | $24.99/mo |
Comet plans
- Free$0
- Pro$20/month
- Max$200/month
- Comet Plus (publisher add-on)$5/month
- Enterprise Pro$40/seat/month
- Enterprise Max$325/seat/month
- Extra Computer credits$1 per 100 credits
From Comet's pricing page, checked Oct 28, 2026.
Genspark plans
- Free$0
- Plus$24.99/month
- Pro$249.99/month
- Team$40/seat/month
From Genspark's pricing page, checked Oct 28, 2026.
Who makes them
- Company
- Comet:Perplexity AI, Inc.
- Genspark:Genspark Inc. (MainFunc Inc.)
- Headquarters
- Comet:San Francisco, California, USA
- Genspark:Palo Alto, California, USA
- Founded
- Comet:2022
- Genspark:2023
- Funding
- Comet:A September 2025 round valued Perplexity at $20 billion, and a January 2026 round reportedly lifted the valuation to about $22-23 billion. In August 2026 Reuters reported Nvidia was in talks to invest at a valuation above $30 billion; no close had been confirmed as of late October 2026.
- Genspark:About $645 million in total: a $60 million seed in June 2024, a $100 million Series A at a $530 million valuation in February 2025, and a Series B of $275 million in November 2025 at $1.25 billion, extended in March 2026 and again in June 2026 to $485 million at a $2.6 billion valuation. Backers include Emergence Capital, SBI Investment, LG Technology Ventures and Sozo Ventures.
Timelines, official links and sources are in each review: Comet · Genspark.
FAQ
Which is better, Comet or Genspark?
It depends on what you want the AI to do. Genspark's free agent clicks, types and submits forms, and completed three of our eight tasks with three more partly done. Comet's free Assistant only answers questions, but it is the lighter, more up-to-date and better-behaved browser. Overall Comet scored 5.2 and Genspark 5.0.
Can Comet or Genspark fill in forms for free?
Genspark can: it filled and submitted our eight-field test form correctly in about 33 seconds on the free plan. On the harder practice form it got nine of eleven fields and misreported the other two. Comet's free Assistant refused to fill any form; Perplexity reserves browser actions for paid plans.
Is Genspark's browser engine out of date?
On our test day, October 28, 2026, Genspark's version page showed a Chrome 141 engine built on October 11, 2026, while Google's stable Chrome was 156. Comet was on Chromium 155. Genspark does not say whether it back-ports security fixes.
Which uses less memory?
Genspark, slightly: 2.6 GB for our ten test tabs against 3.0 GB for Comet (Edge used 2.4 GB). Genspark used far more CPU while the tabs were loading and takes four times the disk space.
Which is cheaper?
Both are free to start. Genspark's free plan gives 100 credits a day, which covered our whole test. Comet is free as a browser, but its agent features start with Perplexity Pro at $20 a month.
Read the full reviews
This page compares the two side by side. Each full review has the complete test log, every screenshot, the scoring notes, pricing, security and company details.
Comet reviewSituational 5.2 On the Free plan Comet is a fast, well-behaved Chromium browser with a quick answer panel, but not an agent: in eight scripted web tasks its Assistant never once clicked, typed or opened a tab, and every answer pointed us to Perplexity's separate Computer agent instead. Read the full review → Genspark reviewSituational 5.0 Genspark's free side-panel agent really does drive the browser: it researched, filled a form and compared prices well. But it got the harder half of our test wrong or not at all, misreported a form it had half-filled, and runs on a Chrome engine 15 versions old. Read the full review → 
