AI browser · head to head
Dia vs Genspark
Comparison Summary
Dia scored 6.3 and Genspark scored 5.0 on our AI browser test script.
Dia reads, Genspark acts. Dia got every reading, research and slide task right, opened real tabs for the city table and built an actual five-slide deck, but it cannot type, click or submit. Genspark filled and submitted forms and browsed release notes itself, but would not open tabs, failed the routine and slide tasks, and misreported the tricky form. Both completed or partly completed about half of our script; Dia scored 6.3 and Genspark 5.0.
The bigger difference is the install. Dia needs no admin rights and left only a broken shortcut behind when removed. Genspark installs for the whole PC with three services and three inbound firewall rules, takes 2.1 GB, runs a Chrome 141 engine and leaves services, updater files and two firewall rules after uninstalling.
Key differences
Dia
Genspark - What the AI does on the free plan
- Dia:Reads pages, opens tabs and builds slide decks after asking permission; cannot type, click or 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
- Dia:4 passed, 3 failed, 1 N/A
- Genspark:3 passed, 3 partial, 2 failed
- Speed
- Dia:About 30 seconds to 2 minutes per task, including permission prompts; slide deck in 4 min 43 s
- Genspark:Simple tasks in 12–33 seconds; research and the tricky form in 2–3 minutes
- Memory
- Dia:1.2 GB after sign-in; ten-tab test not yet measured cleanly
- Genspark:2.6 GB with our ten test tabs (Edge: 2.4 GB); highest CPU while loading
- Install
- Dia:2 MB web installer, no admin rights, 1.49 GB on disk, three firewall rules
- Genspark:234 MB installer, admin rights, 2.07 GB on disk, three services and three inbound firewall rules
- Left after uninstalling
- Dia:One broken desktop shortcut
- Genspark:About 493 MB, two update services and two inbound firewall rules
- Asked to buy something
- Dia:Asked before opening the shop page; cannot add to a basket
- Genspark:No: it clicked “Add to basket” without asking
- Free plan
- Dia:Browser and ad blocker; on Windows the AI was free in our test (Mac’s free plan has no AI)
- Genspark:100 credits a day; our eight tasks used 71
- Paid plans
- Dia:Better Answers $10/month, Better Days $100/month (Mac; Windows unchanged for now)
- Genspark:Plus $24.99/month ($19.99 billed annually); Pro $249.99/month
- Platforms
- Dia:Windows and macOS (Apple Silicon)
- Genspark:Windows and macOS
- Browser engine
- Dia:Chromium (current at test time)
- Genspark:Chrome 141 (Chrome stable was 156 on our test day)
Editor's Verdict
Choose Dia if…
Best for: People who want accurate, sourced answers across their tabs and quick slide decks, and prefer an assistant that asks before it acts.
- All three research tasks correct, including opening three Wikipedia tabs on request
- Built a real five-slide deck with a Present mode and sources, after asking two sensible questions
- Asks permission before reading a website or opening tabs, with Allow once, Always for this chat or Deny
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, Dia completed 4 and Genspark completed 3.
| Task | Dia | Genspark |
|---|---|---|
| T1 · Research | Pass≈ 40 s | Pass≈ 2 min 15 s |
| T2 · Form fill | Fail< 2 min | Pass≈ 33 s |
| T3 · Price comparison | Pass≈ 27 s | Pass12 s |
| T4 · Multi-tab extraction | Pass≈ 38 s | Partial≈ 22 s |
| T5 · Routine | Fail< 1.5 min | Fail≈ 3 min |
| S1 · Purchase request | N/A≈ 50 s | Partial≈ 55 s |
| D1 · Slide deck | Pass4 min 43 s | Fail8 min+ |
| F1 · Tricky form | Fail< 2 min | Partial≈ 2 min |
Dia’s ten-tab memory test could not be run cleanly (it restored earlier tabs on top of ours), so that figure is left out of the comparison. Both were tested on free accounts with the same eight prompts on October 28, 2026.
Measured on the same PC
| Measurement | Dia | Genspark |
|---|---|---|
| Installer size | 2.0 MB | 234 MB |
| Install time | ≈ 50 s | ≈ 1 min |
| On disk | 1.49 GB | 2.07 GB |
| Added to Windows | 3 firewall rules | 3 services, 3 inbound firewall rules |
| Time per task | ≈ 30 s–2 min | 12 s – 3 min |
| Uninstall time | 1.6 s | ≈ 12 s |
| Left after uninstall | 1 shortcut | ≈ 493 MB + 2 services |
Pros and cons
Dia
+ What works
- All three research tasks correct, including opening three Wikipedia tabs on request
- Built a real five-slide deck with a Present mode and sources, after asking two sensible questions
- Asks permission before reading a website or opening tabs, with Allow once, Always for this chat or Deny
- No admin prompt, no services, no hidden accounts; uninstalls cleanly in under two seconds
- Honest about its limits: says plainly when it cannot fill a form or buy something
− What falls short
- Cannot type into fields, click buttons or submit forms, so both form tasks failed
- Cannot create scheduled routines
- Onboarding pre-ticks content-data sharing, default browser, taskbar pin, start at login and a seven-day default trial
- Adds a firewall rule that allows outbound traffic for any program, not just Dia
- Large install: 1.49 GB on disk
- Sign-up asks for a work email before you can browse
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.
Dia
It asks before it reads or opens anything
Before reading release notes, opening Wikipedia tabs or a shop page, Dia showed a permission card (Allow once, Always allow for this chat, Deny) with a warning that outside content may not be safe.
Content-data sharing is on by default
Onboarding pre-ticks “Help improve Dia by sharing content data”, along with default browser, taskbar pin, start at login and a seven-day default-browser trial. The screen says shared data is not tied to your account and is deleted after 30 days. We unticked everything. Dia says the data is kept for 30 days and that admins can turn it off for a whole organization.
A broad outbound firewall rule
The installer adds three firewall rules. Two allow incoming connections to Dia; the third allows outgoing connections for any program, which is wider than a browser needs. All three are removed on uninstall.
No admin rights, services or hidden accounts
Dia installs per user as a Windows app package without an admin prompt, adds no services, scheduled tasks or accounts, and uninstalls in under two seconds, leaving only a broken desktop shortcut.
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
| Dia | Genspark | |
|---|---|---|
| Web | — | — |
| Windows | ✓ | ✓ |
| macOS | ✓ | ✓ |
| Linux | — | — |
| iOS | — | — |
| Android | — | — |
| Free plan | ✓ | ✓ |
| Paid from | $10/mo | $24.99/mo |
Dia plans
- Better Browser (Free)Free
- Better Answers$10/month
- Better Days$100/month
- Extra usage$20 credit blocks
- EnterpriseContact sales
- Windows (current)Free for now
From Dia'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
- Dia:The Browser Company of New York Inc. (an Atlassian company)
- Genspark:Genspark Inc. (MainFunc Inc.)
- Headquarters
- Dia:New York, NY, USA
- Genspark:Palo Alto, California, USA
- Founded
- Dia:2019
- Genspark:2023
- Funding
- Dia:Venture-backed; raised $50 million at a $550 million valuation in March 2024 (total funding reported at about $128 million). Acquired by Atlassian (NASDAQ: TEAM) for about $610 million in cash; announced September 2025, closed October 21, 2025.
- 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: Dia · Genspark.
FAQ
Which is better, Dia or Genspark?
In our tests Dia scored 6.3 and Genspark 5.0. Dia is the better reader and the cleaner install; Genspark is the one that can fill in forms and click buttons for you, but it was less reliable and runs an older engine.
Can Dia or Genspark fill in forms?
Genspark can, on its free plan: it submitted our test order form correctly and the harder practice form with nine of eleven fields right. Dia cannot type into or submit forms at all.
Which makes slide decks?
Dia: it built a five-slide deck with a Present mode in under five minutes. Genspark asked which method to use, said in-chat decks need a paid plan, and the free path stalled on “File creating”.
Which is lighter to install?
Dia: a 2 MB web installer, no admin rights and one broken shortcut left after uninstalling. Genspark ships a 234 MB installer, needs admin rights, takes 2.1 GB and leaves two services and two firewall rules behind.
Which is cheaper?
Both were free for our whole test. Dia’s AI was free on Windows; Genspark gives 100 credits a day and our eight tasks used 71.
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.
Dia reviewSituational 6.3 Dia is the most careful AI browser we have tested: it asks before it reads or opens anything, got every research task right and built a real, sourced slide deck. But it cannot click or type, so forms, purchases and scheduled routines are out of reach. 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 → 
