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Browser Extensions · head to head

Capital One Shopping vs Violentmonkey

Capital One Shopping logo

Capital One Shopping

Browser Extensions

Automatically save while you shop

From
Free
Rated
-
Full reviewWebsite
Violentmonkey logo

Violentmonkey

Browser Extensions

Open source userscript manager

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Capital One Shopping limited to coupon and price comparison features, no true cashback rewards; Violentmonkey smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
  • They diverge on capability: Capital One Shopping covers Price comparison, Violentmonkey covers Userscript support.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Capital One Shopping and Violentmonkey actually diverge.

Attributes where Capital One Shopping and Violentmonkey differ
AttributeCapital One ShoppingViolentmonkey
PlatformsWeb, iOS, AndroidChrome, Firefox, Edge
Founded20142013

Identical on both: starting price (Free), pricing model (Unknown), 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 Capital One Shopping

  • Price comparison
  • Coupon finder
  • Price tracking
  • Credits rewards
  • Safari support

Only in Violentmonkey

  • Userscript support
  • Clean interface
  • Cloud sync
  • Script editor
  • 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.

Capital One Shopping

  • Automatically applying coupon codes at checkoutnot Violentmonkey
  • Tracking price drops on itemsnot Violentmonkey
  • Earning category-based cashback on purchasesnot Violentmonkey

Violentmonkey

  • Run open-source userscripts to customize or automate web pagesnot Capital One Shopping
  • Import scripts compatible with Greasemonkey and Tampermonkey formatsnot Capital One Shopping
  • Sync scripts and settings across browsers via Dropbox, OneDrive, Google Drive, or WebDAVnot Capital One Shopping
  • Batch import/export scripts as zip filesnot Capital One Shopping

Where each one falls short

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

Capital One Shopping

  • Limited to coupon and price comparison features, no true cashback rewards
  • Dependent on retailers offering coupons or price matching
  • Browser extension adds processing overhead to shopping sessions

Violentmonkey

  • Smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
  • Less marketing and visibility results in lower adoption compared to more widely-known alternatives
  • Community maintenance model means slower feature development compared to commercial alternatives

Pricing, plan by plan

Capital One Shopping

Free

No published plan breakdown. See the Capital One Shopping review.

Violentmonkey

Free

No published plan breakdown. See the Violentmonkey review.

Which should you pick?

Choose Capital One Shopping if

  • You need price comparison.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want coupon finder.
Capital One Shopping review

Choose Violentmonkey if

  • You need userscript support.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want clean interface.
Violentmonkey review

Questions people ask

Is Capital One Shopping or Violentmonkey better?
Neither clearly leads. Capital One Shopping starts at Free and Violentmonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Capital One Shopping or Violentmonkey?
Capital One Shopping starts at Free and Violentmonkey at Free.
Does Capital One Shopping or Violentmonkey run on more platforms?
Capital One Shopping runs on Web, iOS, Android. Violentmonkey runs on Chrome, Firefox, Edge.
Can I use Capital One Shopping for free?
Both have a free tier, so you can try either at no cost before committing.
What is Capital One Shopping best used for?
Capital One Shopping is most often used for automatically applying coupon codes at checkout, tracking price drops on items, earning category-based cashback on purchases. Of those, automatically applying coupon codes at checkout and tracking price drops on items are not what Violentmonkey is typically brought in for.
What can Capital One Shopping do that Violentmonkey cannot?
Capital One Shopping covers Price comparison, Coupon finder, Price tracking, Credits rewards. Violentmonkey covers Userscript support, Clean interface, Cloud sync, Script editor. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

Capital One Shopping: Is Capital One Shopping free?

Yes. Capital One Shopping is 100% free to install and use on desktop or mobile. There are no fees or charges.

Source
Violentmonkey: Is Violentmonkey open-source?

Yes. Violentmonkey is fully open-source and available on GitHub, making it free to use and community-maintained unlike Tampermonkey which has a larger proprietary ecosystem.

Source
Capital One Shopping: Does Capital One Shopping require a Capital One account?

No. Capital One Shopping is free for everyone, including people who are not Capital One customers.

Source
Violentmonkey: What browsers does Violentmonkey support?

Violentmonkey works on browsers with WebExtensions support, including Chrome, Firefox, Edge, and other Chromium-based browsers.

Source
Capital One Shopping: What platforms does Capital One Shopping support?

Capital One Shopping is available as a browser extension for desktop browsers and as a mobile app for iOS and Android.

Violentmonkey: How does Violentmonkey compare to Tampermonkey in performance?

Community benchmarks show Violentmonkey uses about 15 to 30 percent less RAM on Chrome compared to Tampermonkey when managing many open tabs.

Source
Violentmonkey: What is the current version of Violentmonkey?

Violentmonkey reached version 2.46.0 as of July 31, 2026, with active ongoing development and regular updates to the open-source project.

Source
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