Softwr

Browser Extensions · head to head

SimilarWeb vs Stay

SimilarWeb logo

SimilarWeb

Browser Extensions

Website traffic and competitive analysis

From
Free
Rated
-
Full reviewWebsite
Stay logo

Stay

Browser Extensions

Safari userscript manager that runs Tampermonkey scripts

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: SimilarWeb browser extension data accuracy is lower than full platform; Stay apple only. No Chrome, Firefox or Edge build, so it cannot serve a cross-browser workflow.
  • They diverge on capability: SimilarWeb covers Traffic analytics, Stay covers Tampermonkey and Violentmonkey compatibility.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which SimilarWeb and Stay actually diverge.

Attributes where SimilarWeb and Stay differ
AttributeSimilarWebStay
Pricing modelfreemiumone-time
PlatformsWeb, Browser ExtensionSafari, iOS, macOS
Founded2007Unknown

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
  • Chrome support
  • Firefox support
  • Edge support

Only in Stay

  • Tampermonkey and Violentmonkey compatibility
  • Userscript management
  • Cross-device bookmark sync
  • Download manager
  • Dark mode
  • One-time purchase across platforms

What people use each for

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

SimilarWeb

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

Stay

  • Running Tampermonkey scripts on Safarinot SimilarWeb
  • Running userscripts on iPhone and iPadnot SimilarWeb
  • Syncing bookmarks across Apple and non-Apple devicesnot SimilarWeb
  • Managing downloads into categorised folders on iOSnot SimilarWeb
  • Forcing dark mode on sites that do not offer itnot 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

Stay

  • Apple only. No Chrome, Firefox or Edge build, so it cannot serve a cross-browser workflow.
  • The free tier is deliberately limited, so the practical product is the paid one.
  • Compatibility with Tampermonkey and Violentmonkey scripts is a translation layer rather than the real thing, and a script relying on an unusual GM function may not behave identically.
  • It bundles bookmark sync, downloads and dark mode alongside the script manager, which is more surface area than some people want from an extension with access to every page.
  • A much smaller project than the established managers, so fewer scripts are tested against it.

Pricing, plan by plan

SimilarWeb

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

Stay

Free
  • FreeFree
    • Limited functionality
  • Lifetime$5/one-time
    • All features
    • iPhone, iPad and Mac
    • Lifetime updates

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 Stay if

  • You need tampermonkey and violentmonkey compatibility.
  • You want to start without paying.
  • You work on Safari, iOS, macOS.
  • You also want userscript management.
Stay review

Questions people ask

Is SimilarWeb or Stay better?
Neither clearly leads. SimilarWeb starts at Free and Stay at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SimilarWeb or Stay?
SimilarWeb starts at Free and Stay at Free.
Does SimilarWeb or Stay run on more platforms?
SimilarWeb runs on Web, Browser Extension. Stay runs on Safari, iOS, macOS.
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 Stay is typically brought in for.
What can SimilarWeb do that Stay cannot?
SimilarWeb covers Traffic analytics, Audience insights, Competitor research, Industry analysis. Stay covers Tampermonkey and Violentmonkey compatibility, Userscript management, Cross-device bookmark sync, Download manager.

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
Stay: Can Stay run Tampermonkey scripts?

Yes. It supports its own native scripts and also scripts written for Tampermonkey and Violentmonkey, which is the main reason to choose it on Safari.

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
Stay: How much does Stay cost?

A one-time payment, reported at around $5, covering iPhone, iPad and Mac with lifetime updates and no subscription. A free version with limited functionality is available.

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
Stay: Does Stay work on iPhone?

Yes. It supports Safari across iPhone, iPad and Mac, and the single purchase covers all three.

Source
Stay: What can userscripts do in Safari through Stay?

The vendor's examples are automatic pagination, immersive translation, redirect blocking and aggregated search. Anything a userscript can do on another browser is broadly in scope, subject to Safari's own restrictions.

Source
Stay: Is Stay open source?

The project publishes source on GitHub, and the app is distributed through the App Store as a paid product with a limited free tier.

Source
Share

Related pages

More on SimilarWeb

More on Stay

Keep looking

Other head to heads