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Browser Extensions · head to head

BuiltWith vs Greasemonkey

BuiltWith logo

BuiltWith

Browser Extensions

See what websites are built with

From
Free
Rated
-
Full reviewWebsite
Greasemonkey logo

Greasemonkey

Browser Extensions

The original userscript manager, for Firefox

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: BuiltWith free tier limited to individual site lookups with no features; Greasemonkey firefox only. There is no Chrome, Edge or Safari build and there never has been.
  • They diverge on capability: BuiltWith covers Technology profiling, Greasemonkey covers Userscript execution.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which BuiltWith and Greasemonkey actually diverge.

Attributes where BuiltWith and Greasemonkey differ
AttributeBuiltWithGreasemonkey
Pricing modelsubscriptionopen-source
PlatformsWebFirefox
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 BuiltWith

  • Technology profiling
  • Market research
  • Competitor analysis
  • Lead generation
  • Chrome support
  • Firefox support
  • Edge support

Only in Greasemonkey

  • Userscript execution
  • Built-in script editor
  • GM. API
  • @resource support
  • Script localisation
  • Firefox for Android

What people use each for

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

BuiltWith

  • Technology intelligence and market researchnot Greasemonkey
  • Competitive analysis and lead generationnot Greasemonkey
  • Web technology tracking and reportingnot Greasemonkey

Greasemonkey

  • Restyling or de-cluttering a site you use dailynot BuiltWith
  • Automating a repetitive action on a web applicationnot BuiltWith
  • Adding a missing feature to a site you do not controlnot BuiltWith
  • Running userscripts on Firefox for Androidnot BuiltWith
  • Writing and testing your own scripts in the browsernot BuiltWith

Where each one falls short

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

BuiltWith

  • Free tier limited to individual site lookups with no features
  • Basic plan severely limited: 2 technologies, 2 keywords, 2 reports
  • Single login user on Basic and Pro plans
  • Minimum paid plan is $295/month
  • No monthly payment option mentioned; minimum 1-month term annual

Greasemonkey

  • Firefox only. There is no Chrome, Edge or Safari build and there never has been.
  • Its API diverged from the Tampermonkey conventions most shared scripts are written against, so a script from a sharing site may need adjusting to run.
  • The dashboard is plainer than Tampermonkey's, with no diff view when a script updates itself.
  • No cloud sync of the kind Tampermonkey and Violentmonkey offer; moving machines means exporting.
  • A userscript manager can read and rewrite every page you visit, so the security of the arrangement depends entirely on the scripts you choose to install.

Pricing, plan by plan

BuiltWith

Free
  • FreeFree
    • Individual site lookups
    • Limited data access
  • Basic$295/month
    • 2 Technologies
    • 2 Keywords
    • 2 Retail Reports
  • Pro$495/month
    • Unlimited Technologies
    • Unlimited Keywords
    • Unlimited Retail Reports
  • Team$995/month
    • Unlimited access all features
    • Unlimited Pro Logins
    • CRM Integration

Greasemonkey

Free
  • Open sourceFree
    • Unlimited scripts
    • Built-in editor
    • No account required

Which should you pick?

Choose BuiltWith if

  • You need technology profiling.
  • You want to start without paying.
  • You also want market research.
BuiltWith review

Choose Greasemonkey if

  • You need userscript execution.
  • You want to start without paying.
  • You work on Firefox.
  • You also want built-in script editor.
Greasemonkey review

Questions people ask

Is BuiltWith or Greasemonkey better?
Neither clearly leads. BuiltWith starts at Free and Greasemonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, BuiltWith or Greasemonkey?
BuiltWith starts at Free and Greasemonkey at Free.
Does BuiltWith or Greasemonkey run on more platforms?
BuiltWith runs on Web. Greasemonkey runs on Firefox.
Can I use BuiltWith for free?
Both have a free tier, so you can try either at no cost before committing.
What is BuiltWith best used for?
BuiltWith is most often used for technology intelligence and market research, competitive analysis and lead generation, web technology tracking and reporting. Of those, technology intelligence and market research and competitive analysis and lead generation are not what Greasemonkey is typically brought in for.
What can BuiltWith do that Greasemonkey cannot?
BuiltWith covers Technology profiling, Market research, Competitor analysis, Lead generation. Greasemonkey covers Userscript execution, Built-in script editor, GM. API, @resource support.

Answered from the vendors’ own pages

BuiltWith: Does BuiltWith offer a free plan?

Yes, BuiltWith offers a free tier for individual website lookups. For full features, paid plans start at $295/month (Basic).

Source
Greasemonkey: Is Greasemonkey still maintained?

Yes. Version 4.14 was released on 2 June 2026, and the project has an active repository, bug tracker and discussion groups.

Source
BuiltWith: What are the differences between Basic and Pro plans?

Basic ($295/month) includes 2 technologies, 2 keywords, and 2 retail reports. Pro ($495/month) provides unlimited access to technologies, keywords, and retail reports.

Source
Greasemonkey: Does Greasemonkey work on Chrome?

No. It is a Firefox extension and has never shipped for Chrome. Violentmonkey and Tampermonkey are the equivalents there.

Source
BuiltWith: How many users can access BuiltWith simultaneously?

Basic and Pro plans include 1 system login. The Team plan at $995/month provides unlimited Pro Logins for multi-user access.

Source
Greasemonkey: Will Tampermonkey scripts run in Greasemonkey?

Often, but not always. Greasemonkey's API diverged from the conventions most shared scripts are written against, so a script may need its header or its GM calls adjusted.

Source
BuiltWith: What payment methods does BuiltWith accept?

BuiltWith accepts credit cards (Visa, Mastercard, Amex), PayPal, Bitcoin, and wire transfers for yearly contracts.

Source
Greasemonkey: Does Greasemonkey run on mobile?

On Firefox for Android, from version 4.12. There is no iOS build, because Firefox on iOS cannot load extensions of this kind.

Source
Greasemonkey: What is the GM API?

The set of functions a userscript manager exposes to scripts, named after Greasemonkey, which defined it. Greasemonkey supports the promise-based GM. form including GM.xmlHttpRequest and GM.registerMenuCommand.

Source
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