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Software · head to head

SimilarWeb vs Stylus

S

SimilarWeb

Software

Website traffic and competitive analysis

From
Free
Rated
-
Full reviewWebsite
Stylus logo

Stylus

Software

Restyle the web with custom CSS

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: SimilarWeb browser extension data accuracy is lower than full platform; Stylus crashes and instability when applying certain styles
  • They diverge on capability: SimilarWeb covers Traffic analytics, Stylus covers Custom CSS injection.

Where they differ

Only the attributes on which SimilarWeb and Stylus actually diverge.

Attributes where SimilarWeb and Stylus differ
AttributeSimilarWebStylus
Pricing modelfreemiumfree
PlatformsWeb, Browser ExtensionChrome, Firefox, Edge, Opera
Founded20072017

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

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 Stylus

  • Custom CSS injection
  • Style management
  • userstyles.world integration
  • Built-in editor
  • Opera support

Both cover

  • Chrome support
  • Firefox support
  • Edge support

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

Stylus

  • Crashes and instability when applying certain styles
  • No visual element selector tool for identifying page elements to style
  • Security risk if downloading and applying untrusted user-created styles

Pricing, plan by plan

SimilarWeb

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

Stylus

Free
  • FreeFree
    • Custom CSS
    • Style library
    • Style editor

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 Stylus if

  • You need custom css injection.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge, Opera.
  • You also want style management.
Stylus review

Questions people ask

Is SimilarWeb or Stylus better?
Neither clearly leads. SimilarWeb starts at Free and Stylus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SimilarWeb or Stylus?
SimilarWeb starts at Free and Stylus at Free.
Does SimilarWeb or Stylus run on more platforms?
SimilarWeb runs on Web, Browser Extension. Stylus 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 can SimilarWeb do that Stylus cannot?
SimilarWeb covers Traffic analytics, Audience insights, Competitor research, Industry analysis. Stylus covers Custom CSS injection, Style management, userstyles.world integration, Built-in editor. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

SimilarWeb: Is the SimilarWeb browser extension free?

Yes. The SimilarWeb browser extension is completely free to install and use with no paid tiers and no credit card required.

Source
Stylus: Is Stylus free?

Yes. Stylus is completely free and open-source, available for Chrome, Firefox, Edge, and Opera browsers.

Source
SimilarWeb: How many websites does SimilarWeb cover?

SimilarWeb provides access to intelligence from 1B+ websites and 8M apps, tracks 5B search terms and 250M display ads across 190 countries and 210 industries.

Source
Stylus: Can I use Stylus to change the browser UI?

No. Due to WebExtensions security restrictions, Stylus can only customize website pages, not the browser interface itself.

Source
SimilarWeb: How accurate is SimilarWeb extension data?

Browser extension data accuracy is lower than the full platform, but it is adequate for ballpark figures of traffic estimates.

Source
Stylus: What CSS pre-processors does Stylus support?

Stylus supports CSS, LESS, and Stylus syntax with built-in linting using Stylelint and CSSLint-mod with customizable rules.

Source
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Related pages

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