AI browser · head to head
Genspark vs Polar
Comparison Summary
Polar scored 7.0 and Genspark scored 5.0 on our AI browser test script.
Both have agents that act in the page, but Polar's did far more of our tasks: seven of eight and half of the eighth, against three for Genspark, which also claimed two empty form fields were filled. Polar was faster too, and every report it gave matched the page.
Polar also installs more lightly: no admin rights, no services and nothing listening on the network, against Genspark's admin install, three services and firewall rules. Both run old engines, Chromium 153 for Polar and 141 for Genspark. Polar scored 7.0 and Genspark 5.0.
Key differences
Genspark
Polar - What the AI does on the free plan
- Genspark:An agent: navigates, fills in and submits forms and reads pages in the current tab; would not open separate tabs
- Polar:An agent: opens real tabs, fills in and submits forms, builds files and runs scheduled workflows
- Our 8 scripted tasks
- Genspark:3 passed, 3 partial, 2 failed
- Polar:7 passed, 1 partial
- Speed
- Genspark:Simple tasks in 12–33 seconds; research and the tricky form in 2–3 minutes
- Polar:Most tasks in 15–45 seconds; slide deck in about 50 seconds
- Memory
- Genspark:2.6 GB with our ten test tabs (Edge: 2.4 GB); highest CPU while loading
- Polar:2.4 GB with our ten test tabs (Edge: 2.4 GB)
- Install
- Genspark:234 MB installer, admin rights, 2.07 GB on disk, three services and three inbound firewall rules
- Polar:229 MB installer, no admin rights, 560 MB on disk; nothing runs at startup
- Left after uninstalling
- Genspark:About 493 MB, two update services and two inbound firewall rules
- Polar:The 143 MB signed-in profile and a small cookie file
- Asked to buy something
- Genspark:No: it clicked “Add to basket” without asking
- Polar:Bought nothing and said it would stop before paying
- Free plan
- Genspark:100 credits a day; our eight tasks used 71
- Polar:1,000 credits to start plus 50 a day; our eight tasks used 52
- Paid plans
- Genspark:Plus $24.99/month ($19.99 billed annually); Pro $249.99/month
- Polar:Individual $20/month (10,000 credits); Teams $50/seat/month
- Platforms
- Genspark:Windows and macOS
- Polar:Windows and macOS
- Browser engine
- Genspark:Chrome 141 (Chrome stable was 156 on our test day)
- Polar:Chromium 153 (Chrome stable was 156 on our test day)
Editor's Verdict
Choose Polar if…
Best for: 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.
- Seven of eight scripted tasks fully done and one partly, with its own built-in agent; every form report matched the page
- Fast: most tasks took 15 to 45 seconds, and the five-slide deck about 50 seconds
- Generous free plan: our eight tasks used 52 of the 1,000 starting credits, and 50 more are added every day
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, Genspark completed 3 and Polar completed 7.
| Task | Genspark | Polar |
|---|---|---|
| T1 · Research | Pass≈ 2 min 15 s | Partial≈ 35–40 s |
| T2 · Form fill | Pass≈ 33 s | Pass≈ 25 s |
| T3 · Price comparison | Pass12 s | Pass≤ 15 s |
| T4 · Multi-tab extraction | Partial≈ 22 s | Pass≈ 30–40 s |
| T5 · Routine | Fail≈ 3 min | Pass≈ 30 s |
| S1 · Purchase request | Partial≈ 55 s | Pass≈ 25 s |
| D1 · Slide deck | Fail8 min+ | Pass≈ 50 s |
| F1 · Tricky form | Partial≈ 2 min | Pass≈ 45–60 s |
Both were tested on free accounts with the same eight prompts on the same clean Windows 11 PC in October 2026.
Measured on the same PC
| Measurement | Genspark | Polar |
|---|---|---|
| Installer size | 234 MB | 229 MB |
| Install time | ≈ 1 min | ≈ 40 s |
| On disk | 2.07 GB | 703 MB |
| Admin rights | Required | Not needed |
| Added to Windows | 3 services, 3 inbound firewall rules | Nothing running |
| Browser engine | Chrome 141 | Chromium 153 |
| Time per task | 12 s – 3 min | 15 – 60 s |
| Credits used | 71 of 100 | 52 |
| 10 tabs, RAM | 2.6 GB | 2.4 GB |
| 10 tabs, private memory | 1.6 GB | 1.2 GB |
| CPU while loading 10 tabs | 1.75 cores | 1.14 cores |
| Cold start | 1.2 s | 3.4 – 3.7 s |
| Uninstall time | ≈ 12 s | ≈ 6 s |
| Left after uninstall | ≈ 493 MB + 2 services | 143 MB |
Pros and cons
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
Polar
+ What works
- Seven of eight scripted tasks fully done and one partly, with its own built-in agent; every form report matched the page
- Fast: most tasks took 15 to 45 seconds, and the five-slide deck about 50 seconds
- Generous free plan: our eight tasks used 52 of the 1,000 starting credits, and 50 more are added every day
- Says what it did not check: it flagged secondary sources, titles filled from memory and the workflow it could not delete
- Built-in Workflows with schedules, local or in the cloud; the agent created, showed and unscheduled ours
- Memory use like Edge: 2.4 GB with our ten test tabs
- No admin rights, no services, no startup entries, and nothing listening on the network
− What falls short
- An account is required before you can use it at all, even as a plain browser
- The agent's prompts, screenshots and page context go to Polar's servers and unnamed AI providers
- Chromium 153, three versions behind Chrome on our test day
- Slow to start: about 3.5 seconds, against 0.7 for Edge
- Setup ticks “Set Polar as my default browser” for you
- The uninstaller leaves the signed-in profile (143 MB) and a stray cookie file behind
- Wide tables overflow the chat, and the slide deck cannot be previewed inside Polar
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.
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).
Polar
Account required
Polar shows only a Sign In button until you create an account; there is no way to use it as a plain browser without one.
Nothing in the background
No services, scheduled tasks or startup entries, and the only listening port is on the PC itself. No admin rights were needed to install or uninstall.
Profile and cookie file left behind
After uninstalling, the 143 MB profile with your cookies and sign-ins stayed, as did a shared cookie file Polar wrote to a separate folder in your user profile.
Engine three versions behind
Version 0.2.2 is built on Chromium 153.0.8010.53; Chrome stable was 156 on our test day.
Features & Pricing
| Genspark | Polar | |
|---|---|---|
| Web | — | — |
| Windows | ✓ | ✓ |
| macOS | ✓ | ✓ |
| Linux | — | — |
| iOS | — | — |
| Android | — | — |
| Free plan | ✓ | ✓ |
| Paid from | $24.99/mo | $20/mo |
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
- Genspark:Genspark Inc. (MainFunc Inc.)
- Polar:Recursive Intelligence, Inc.
- Headquarters
- Genspark:Palo Alto, California, USA
- Polar:San Francisco, California, USA
- Founded
- Genspark:2023
- Polar:—
- Funding
- 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.
- Polar:$5.7 million seed round led by Madrona, announced July 29, 2026.
Timelines, official links and sources are in each review: Genspark · Polar.
FAQ
Which is better, Polar or Genspark?
Polar in our tests, 7.0 against 5.0: it completed seven tasks and partly an eighth with accurate reports; Genspark completed three and misreported a form.
Which asked before buying?
Polar bought nothing and said it would stop before paying. Genspark clicked “Add to basket” without asking.
Which free plan goes further?
Polar: our eight tasks used 52 of 1,000 starting credits, with 50 added daily. Genspark's eight tasks used 71 of its 100 daily credits.
Which uses less memory?
Polar, slightly: 2.4 GB for our ten tabs against 2.6 GB for Genspark.
Which installs more cleanly?
Polar: no admin rights, no services, no firewall rules. Genspark needs admin rights and adds three services and inbound firewall rules.
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.
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 → Polar reviewRecommended 7.0 Polar's own agent did seven of our eight tasks and half of the eighth, quickly and with honest reports, on a free plan that barely noticed the cost. It needs an account, sends what the agent sees to its servers and runs a three-version-old engine, but it is the best all-in-one AI browser we have tested on Windows. Read the full review → AI Browsers Alternatives
BrowserOS neo Situational 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 6.3 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 
