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Browser Extensions · head to head

SimilarWeb vs uBlock Origin

SimilarWeb logo

SimilarWeb

Browser Extensions

Website traffic and competitive analysis

From
Free
Rated
-
Full reviewWebsite
uBlock Origin logo

uBlock Origin

Browser Extensions

Free, open-source ad content blocker

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: SimilarWeb browser extension data accuracy is lower than full platform; uBlock Origin cNAME uncloaking of third-party trackers disguised as first-party is only available on Firefox, because the required DNS API does not exist in Chromium
  • They diverge on capability: SimilarWeb covers Traffic analytics, uBlock Origin covers Ad blocking.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which SimilarWeb and uBlock Origin actually diverge.

Attributes where SimilarWeb and uBlock Origin differ
AttributeSimilarWebuBlock Origin
Pricing modelfreemiumfree
PlatformsWeb, Browser ExtensionChrome, Firefox, Edge, Opera
Founded20072014

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in SimilarWeb

  • Traffic analytics
  • Audience insights
  • Competitor research
  • Industry analysis

Only in uBlock Origin

  • Ad blocking
  • Tracker blocking
  • Malware domain blocking
  • Custom filter lists
  • Opera support

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

The jobs each tool is most often brought in to do.

SimilarWeb

  • Analyzing competitor advertising across display, search, socialnot uBlock Origin
  • Understanding traffic loss to search and AI recommendationsnot uBlock Origin
  • Tracking brand visibility across ChatGPT and AI chatbotsnot uBlock Origin
  • Optimizing Amazon product placement with marketplace analyticsnot uBlock Origin
  • Identifying high-intent prospects at optimal buying momentsnot uBlock Origin

uBlock Origin

  • Ad and tracker blocking in web browsersnot SimilarWeb
  • Privacy protection while browsing the webnot SimilarWeb
  • Reducing bandwidth usage by blocking adsnot SimilarWeb
  • Users seeking open-source browser extensionsnot SimilarWeb

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

SimilarWeb

  • Browser extension data accuracy is lower than full platform
  • Full platform pricing is not transparent and requires quote-based inquiry

uBlock Origin

  • CNAME uncloaking of third-party trackers disguised as first-party is only available on Firefox, because the required DNS API does not exist in Chromium
  • HTML filtering of response bodies requires the webRequest.filterResponseData API, which is only available in Firefox
  • On Chromium-based browsers uBO is not reliably ready at browser launch, so tracker and advertisement payloads can reach already-open tabs before filtering starts
  • Pre-fetch blocking is not reliable on Chromium-based browsers because they give websites precedence over user settings
  • The Chromium build does not use the WebAssembly filtering code paths, because the extra manifest permission would create friction publishing to the Chrome Web Store
  • LZ4 storage compression is Firefox only, and on Chromium in incognito mode IndexedDB resets, so uBO launches with out-of-date filter lists

Pricing, plan by plan

SimilarWeb

Free
  • FreeFree
    • Traffic overview
    • Engagement metrics
    • Similar sites

uBlock Origin

Free
  • FreeFree
    • Ad blocking
    • Tracker blocking
    • Custom filter lists

Which should you pick?

Choose SimilarWeb if

  • You need traffic analytics.
  • You want to start without paying.
  • You work on Web, Browser Extension.
  • You also want audience insights.
SimilarWeb review

Choose uBlock Origin if

  • You need ad blocking.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge, Opera.
  • You also want tracker blocking.
uBlock Origin review

Questions people ask

Is SimilarWeb or uBlock Origin better?
Neither clearly leads. SimilarWeb starts at Free and uBlock Origin at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SimilarWeb or uBlock Origin?
SimilarWeb starts at Free and uBlock Origin at Free.
Does SimilarWeb or uBlock Origin run on more platforms?
SimilarWeb runs on Web, Browser Extension. uBlock Origin runs on Chrome, Firefox, Edge, Opera.
Can I use SimilarWeb for free?
Both have a free tier, so you can try either at no cost before committing.
What is SimilarWeb best used for?
SimilarWeb is most often used for analyzing competitor advertising across display, search, social, understanding traffic loss to search and ai recommendations, tracking brand visibility across chatgpt and ai chatbots, optimizing amazon product placement with marketplace analytics. Of those, analyzing competitor advertising across display, search, social and understanding traffic loss to search and ai recommendations are not what uBlock Origin is typically brought in for.
What can SimilarWeb do that uBlock Origin cannot?
SimilarWeb covers Traffic analytics, Audience insights, Competitor research, Industry analysis. uBlock Origin covers Ad blocking, Tracker blocking, Malware domain blocking, Custom filter lists. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

SimilarWeb: How much does Similarweb cost?

Similarweb does not publish pricing. Custom packages are available for businesses and enterprises. Self-service options are available for entrepreneurs and small teams. Customers must start a free trial or contact sales to receive a quote.

Source
uBlock Origin: How much does uBlock Origin cost?

uBlock Origin is completely free and open-source software with no licensing fees, subscriptions, or commercial restrictions.

Source
SimilarWeb: Does Similarweb offer a free trial?

Yes. Similarweb offers free trials for its various products. Users can start a free trial through their registration page or contact support to switch between different product trials.

Source
uBlock Origin: Is uBlock Origin open source?

Yes, uBlock Origin is distributed under the GPL-3.0 License with source code publicly available on GitHub. The project encourages community review and contribution.

Source
SimilarWeb: What products does Similarweb offer?

Similarweb offers the Competitive Intelligence Suite, Strategic SEO Suite, Ads Intelligence Suite, Gen AI Intelligence Suite, AI Studio with natural language queries, custom data feeds, API access, and managed services with custom dashboards.

Source
uBlock Origin: Does uBlock Origin accept donations?

No, uBlock Origin explicitly does not accept donations. The project instead encourages users to support the developers maintaining the filter lists that power the extension.

Source
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