AI browser · head to head
BrowserOS neo vs Genspark
BrowserOS neo
SituationalAhead on 4 of 6 scored axes
Read the full BrowserOS neo review →Comparison Summary
BrowserOS neo scored 6.3 and Genspark scored 5.0 on our AI browser test script.
Both promise an AI that acts in the page. Genspark's free agent completed three of eight tasks, partly did three and, on the tricky form, reported two empty fields as filled. BrowserOS neo, with Claude driving it, completed all eight, and every report matched the page.
Genspark includes its agent with 100 free credits a day; neo needs a separate, paid agent. On the install neo is far lighter: no admin rights, no services, a current-ish Chromium 155 engine and 965 MB on disk, against Genspark's admin install, Chrome 141 engine and 2.1 GB. Both open network listeners that made or needed firewall rules. BrowserOS neo scored 6.3 and Genspark 5.0.
Key differences
BrowserOS neo
Genspark - What the AI does on the free plan
- BrowserOS neo:No AI of its own: an outside agent (we used Claude) drives it over MCP and can open tabs, click, type and submit
- 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
- BrowserOS neo:8 passed, with Claude Opus 5.5 driving it
- Genspark:3 passed, 3 partial, 2 failed
- Speed
- BrowserOS neo:Most tasks in 30–50 seconds; slide deck in about 3 minutes
- Genspark:Simple tasks in 12–33 seconds; research and the tricky form in 2–3 minutes
- Memory
- BrowserOS neo:2.9 GB with our ten test tabs (Edge: 2.4 GB); highest CPU while loading
- Genspark:2.6 GB with our ten test tabs (Edge: 2.4 GB); highest CPU while loading
- Install
- BrowserOS neo:138 MB installer, no admin rights, 965 MB on disk; listens on two ports on all networks
- Genspark:234 MB installer, admin rights, 2.07 GB on disk, three services and three inbound firewall rules
- Left after uninstalling
- BrowserOS neo:About 752 MB of profile data and session recordings, plus its entry in Claude's settings
- Genspark:About 493 MB, two update services and two inbound firewall rules
- Asked to buy something
- BrowserOS neo:Bought nothing and said it would confirm the item and total first
- Genspark:No: it clicked “Add to basket” without asking
- Free plan
- BrowserOS neo:The browser is free and open source; the AI agent is paid separately
- Genspark:100 credits a day; our eight tasks used 71
- Paid plans
- BrowserOS neo:None for neo; your agent's plan or API costs (we used a paid Claude plan)
- Genspark:PAID_PLANS
- Platforms
- BrowserOS neo:Windows and macOS (Linux listed on the site)
- Genspark:Windows and macOS
- Browser engine
- BrowserOS neo:Chromium 155 (Chrome stable was 156 on our test day)
- Genspark:Chrome 141 (Chrome stable was 156 on our test day)
Editor's Verdict
Choose BrowserOS neo if…
Best for: People who already use Claude Code, Codex or Cursor and want their agent to work in a real, separate browser they can watch and replay.
- With Claude connected, all eight scripted tasks were completed, and every report matched what the page showed
- Each task runs in its own named tab group, so you can watch the agent work without it touching your tabs
- Every agent session is recorded locally and can be replayed from the Cockpit
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 8 tasks both apps were graded on, BrowserOS neo completed 8 and Genspark completed 3.
| Task | BrowserOS neo | Genspark |
|---|---|---|
| T1 · Research | Pass≈ 35–50 s | Pass≈ 2 min 15 s |
| T2 · Form fill | Pass≈ 35–45 s | Pass≈ 33 s |
| T3 · Price comparison | Pass≈ 15–20 s | Pass12 s |
| T4 · Multi-tab extraction | Pass≈ 35–50 s | Partial≈ 22 s |
| T5 · Routine | Pass≈ 30–45 s | Fail≈ 3 min |
| S1 · Purchase request | Pass≈ 35 s | Partial≈ 55 s |
| D1 · Slide deck | Pass≈ 3 min | Fail8 min+ |
| F1 · Tricky form | Pass≈ 1 min 20 s | Partial≈ 2 min |
BrowserOS neo has no AI of its own, so its tasks were run by Claude Desktop (Opus 5.5) driving neo over MCP; the other browser used its own built-in assistant. All tests ran on the same clean Windows 11 PC with the same eight prompts in October 2026.
Measured on the same PC
| Measurement | BrowserOS neo | Genspark |
|---|---|---|
| Installer size | 138 MB | 234 MB |
| Install time | ≈ 25 s | ≈ 1 min |
| On disk | 965 MB | 2.07 GB |
| Admin rights | Not needed | Required |
| Added to Windows | No services | 3 services, 3 inbound firewall rules |
| Browser engine | Chromium 155 | Chrome 141 |
| Time per task | 15 s – 3 min | 12 s – 3 min |
| 10 tabs, RAM | 2.9 GB | 2.6 GB |
| 10 tabs, private memory | 1.8 GB | 1.6 GB |
| CPU while loading 10 tabs | 1.84 cores | 1.75 cores |
| Cold start | 1.3 s | 1.2 s |
| Uninstall time | < 6 s | ≈ 12 s |
| Left after uninstall | 752 MB | ≈ 493 MB + 2 services |
Pros and cons
BrowserOS neo
+ What works
- With Claude connected, all eight scripted tasks were completed, and every report matched what the page showed
- Each task runs in its own named tab group, so you can watch the agent work without it touching your tabs
- Every agent session is recorded locally and can be replayed from the Cockpit
- One-click connection for Claude Code; works with Codex, Cursor and other MCP clients
- No admin rights, no services, no scheduled tasks; installs in about 25 seconds and uninstalls in under 6
- Free and open source (AGPL-3.0)
− What falls short
- No built-in AI at all: without an outside agent it is a plain Chromium browser
- You need a separate AI agent and its plan or API costs; our results reflect Claude Opus 5.5 as much as the browser
- The browser listens on two ports on every network interface, which made Windows Firewall ask for network access on first launch
- Telemetry with a random install ID is on by default
- Highest CPU load we have measured while opening our ten test tabs (1.84 cores) and 2.9 GB of memory, against 2.4 GB for Edge
- Leaves 752 MB of profile data and session recordings with the default uninstall, plus its connection entry in Claude's settings
- No built-in ad blocker
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.
BrowserOS neo
Listens on every network interface
The browser opened ports 9010 and 9011 on all network interfaces, not only on the PC itself, so Windows Firewall asked to allow it on public and private networks. We clicked Cancel, which keeps it blocked.
Your pages go to the agent you connect
Every page the agent reads is sent to its AI provider. Use an agent and plan whose data terms you accept, and think twice before signing it in to banking or work accounts.
Recordings stay on disk
Every agent session is recorded locally; 72 MB for our test. With the default uninstall the 752 MB profile, recordings included, stays on the PC.
No admin rights, nothing that runs at startup
The installer and uninstaller need no admin rights and add no services, scheduled tasks or startup entries. The installer is signed by Felafax, Inc.
Engine one version behind
Version 155.0.8315.26 is based on Chromium 155; Chrome stable was 156 on our test day. BrowserOS updates itself in the background.
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
| BrowserOS neo | Genspark | |
|---|---|---|
| Web | — | — |
| Windows | ✓ | ✓ |
| macOS | ✓ | ✓ |
| Linux | ✓ | — |
| iOS | — | — |
| Android | — | — |
| Free plan | ✓ | ✓ |
| Paid from | Not checked | $24.99/mo |
BrowserOS neo plans
- BrowserOS neoFree
- Your AI agentSeparate
- Ultrafast modeNot launched
From BrowserOS neo'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.
Cost for your team
- Genspark$1,499per year
- BrowserOS neo—no paid plan
Cheapest paid plan × seats × 12, at list price. Annual discounts and volume deals not included. BrowserOS neo and Genspark also have a free plan.
Who makes them
- Company
- BrowserOS neo:BrowserOS (Felafax, Inc.)
- Genspark:Genspark Inc. (MainFunc Inc.)
- Headquarters
- BrowserOS neo:Redwood City and San Francisco, California, USA
- Genspark:Palo Alto, California, USA
- Founded
- BrowserOS neo:2024
- Genspark:2023
- Funding
- BrowserOS neo:Backed by Y Combinator (Summer 2024 batch); no further funding has been announced.
- 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: BrowserOS neo · Genspark.
FAQ
Which is better, BrowserOS neo or Genspark?
BrowserOS neo in our tests, 6.3 against 5.0: with Claude it completed all eight tasks accurately, while Genspark completed three and misreported a form. Genspark is the one with a free built-in agent.
Which reports results accurately?
BrowserOS neo with Claude: every report matched the page. Genspark said two empty form fields were filled.
Which has the newer engine?
BrowserOS neo, on Chromium 155. Genspark ran Chrome 141 while Chrome was at 156.
Which uses less memory?
Genspark, slightly: 2.6 GB for our ten tabs against 2.9 GB for BrowserOS neo (Edge used 2.4 GB).
Which is cheaper?
Genspark's free 100 credits a day covered our test. BrowserOS neo is free, but the agent you connect has its own costs.
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.
BrowserOS neo reviewSituational 6.3 BrowserOS neo has no AI of its own: it is a browser built for an outside agent to drive. With Claude connected it completed all eight of our tasks and reported every result accurately, but that score belongs to the pair, and you need a paid AI agent and some setup to get there. 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 → AI Browsers Alternatives
Polar Recommended People who want an AI browser that fills forms, opens tabs, builds files and runs scheduled tasks on its own, without paying for or setting up a separate agent 7.0 Read reviewReview 
Dia Situational People who want accurate, sourced answers across their tabs and quick slide decks, and prefer an assistant that asks before it acts 6.3 Read reviewReview 
