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Chrome extensionwhat they say

WebBrain

Open-source AI browser agent — chat with pages, automate tasks, multi-provider LLM support.

★★★★☆4.0 (23) · 4k+ users
Free
Website ↗ Chrome Web Store ↗
what mrrlens sees
MRR · No price listedNo price in the listing
Opportunity—
Buyer threads · 30 d0
“i want to use this extension but for now after taking the subscription i am unable to use this.”
#1 complaint · Pricing · 1 of 2 complaints read · analysed Oct 31, 2026 · source

01Revenue

No price in the listing

Store data from the Chrome Web Store listing, refreshed daily. Updated 1 d ago.

02Why users leave WebBrain

Pricing1 review · 1 of 2

User paid for subscription but extension still asks to subscribe and does not recognize their account, blocking use.

“i want to use this extension but for now after taking the subscription i am unable to use this.” source ↗
1 more complaint, with verbatim quotesIncluded in the day pass and Pro.
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Sample: 2 recent complaints (1–3★ reviews) · clustered Oct 31, 2026 · complaints from Sep 2026–Oct 2026, almost all in the last 24 months · each review labelled by a model, quotes verbatim

03How to build a better WebBrain

Build difficultyMediumBrowser extension approvals, multiple LLM API integrations, and subscription entitlement handling are the main complexity.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
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04Who wants a better WebBrain

0 buyer threads in the last 30 days name WebBrain, and 18 more are in the same market.

05Questions about WebBrain

How much revenue does WebBrain make?

WebBrain's listing publishes no price and no paid plan, so MRRLens shows no revenue estimate. It may still charge on its own website; a founder can verify the real figure.

What do users complain about most in WebBrain?

Across 2 recent complaints, the most common is pricing (1 of 2). User paid for subscription but extension still asks to subscribe and does not recognize their account, blocking use.

What are the best WebBrain alternatives?

The closest alternatives MRRLens found are Nanobrowser, Page Agent Ext and Retriever AI. The full list, with why users leave, is on the WebBrain alternatives page.

How many people use WebBrain?

WebBrain lists 4k+ users on the Chrome Web Store, rated 4.0 (23).

See the full x-ray of WebBrain

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.