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Browser Extensions · head to head

LanguageTool vs Tampermonkey

LanguageTool logo

LanguageTool

Browser Extensions

Grammar and spell checker for 25+ languages

From
Free
Rated
-
Full reviewWebsite
Tampermonkey logo

Tampermonkey

Browser Extensions

The most popular userscript manager

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: LanguageTool free tier limited to basic spelling and simple punctuation; advanced punctuation and style issues caught only on premium; Tampermonkey only source code up to version 2.9 is GPLv3; all newer versions are distributed under a proprietary license despite the extension itself being free to use
  • They diverge on capability: LanguageTool covers Multi-language support, Tampermonkey covers Userscript management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which LanguageTool and Tampermonkey actually diverge.

Attributes where LanguageTool and Tampermonkey differ
AttributeLanguageToolTampermonkey
Pricing modelfreemiumopen-source
PlatformsWeb editor, Windows desktop app, macOS desktop app, Chrome extension, Firefox extension, Edge extension, Safari extension, Opera extension, Google Docs, Microsoft Word, iOS appWeb, Windows, macOS, Linux, Android
Founded20032010

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 LanguageTool

  • Multi-language support
  • Grammar checking
  • Style suggestions
  • Personal dictionary

Only in Tampermonkey

  • Userscript management
  • Script editor
  • Auto-update
  • Cloud sync

Both cover

  • Chrome support
  • Firefox support
  • Edge support
  • Safari support
  • Opera support

What people use each for

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

LanguageTool

  • Grammar and spelling correction across web and desktopnot Tampermonkey
  • Style and clarity improvementsnot Tampermonkey
  • Multilingual writing assistancenot Tampermonkey

Tampermonkey

  • Auto-run custom JavaScript to add features to specific websitesnot LanguageTool
  • Block ads, remove clutter, or reformat page layout via community/personal userscriptsnot LanguageTool
  • Run scripts sourced from Greasy Fork or similar userscript repositoriesnot LanguageTool
  • Automate repetitive web tasks such as form-filling or redirect skipping via installed scriptsnot LanguageTool

Where each one falls short

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

LanguageTool

  • Free tier limited to basic spelling and simple punctuation; advanced punctuation and style issues caught only on premium
  • Picky Mode (advanced typography) unavailable on free plan
  • Specific pricing not displayed on main page; requires navigation to purchase flow

Tampermonkey

  • Only source code up to version 2.9 is GPLv3; all newer versions are distributed under a proprietary license despite the extension itself being free to use
  • Under Manifest V3, GM_webRequest is not (yet) supported
  • Under Manifest V3, GM_xmlhttpRequest fires only one progress event instead of streaming progress, requiring a responseType: 'stream' workaround
  • Since v5.3.2, Chrome/Edge (MV3) requires the user to manually enable Developer Mode, or from Chrome 138+ a per-extension 'Allow User Scripts' toggle, before any userscript will run

Pricing, plan by plan

LanguageTool

Free
  • BasicFree
    • 2,000 character limit per text
    • 3 AI paraphrasing requests per day
    • Basic grammar and spelling checks
  • Premium$null/month
    • 150,000 character limit per text
    • Unlimited AI paraphrasing
    • 20,000+ grammar and style checks
  • Teams$null/month
    • Per-user, per-month pricing
    • 2-1000+ users
    • Team Style Guide

Tampermonkey

Free

No published plan breakdown. See the Tampermonkey review.

Which should you pick?

Choose LanguageTool if

  • You need multi-language support.
  • You want to start without paying.
  • You work on Web editor, Windows desktop app, macOS desktop app, Chrome extension, Firefox extension, Edge extension, Safari extension, Opera extension, Google Docs, Microsoft Word, iOS app.
  • You also want grammar checking.
LanguageTool review

Choose Tampermonkey if

  • You need userscript management.
  • You want to start without paying.
  • You work on Web, Windows, macOS, Linux, Android.
  • You also want script editor.
Tampermonkey review

Questions people ask

Is LanguageTool or Tampermonkey better?
Neither clearly leads. LanguageTool starts at Free and Tampermonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, LanguageTool or Tampermonkey?
LanguageTool starts at Free and Tampermonkey at Free.
Does LanguageTool or Tampermonkey run on more platforms?
LanguageTool runs on Web editor, Windows desktop app, macOS desktop app, Chrome extension, Firefox extension, Edge extension, Safari extension, Opera extension, Google Docs, Microsoft Word, iOS app. Tampermonkey runs on Web, Windows, macOS, Linux, Android.
Can I use LanguageTool for free?
Both have a free tier, so you can try either at no cost before committing.
What is LanguageTool best used for?
LanguageTool is most often used for grammar and spelling correction across web and desktop, style and clarity improvements, multilingual writing assistance. Of those, grammar and spelling correction across web and desktop and style and clarity improvements are not what Tampermonkey is typically brought in for.
What can LanguageTool do that Tampermonkey cannot?
LanguageTool covers Multi-language support, Grammar checking, Style suggestions, Personal dictionary. Tampermonkey covers Userscript management, Script editor, Auto-update, Cloud sync. Both handle Chrome support, Firefox support, Edge support, Safari support.

Answered from the vendors’ own pages

LanguageTool: Does LanguageTool have a free version?

Yes, LanguageTool Basic is free with a 2,000 character limit per text field and 3 AI paraphrasing requests per day for basic grammar and spelling checks.

Source
Tampermonkey: How much does Tampermonkey cost?

Tampermonkey is completely free for all versions and across all supported browsers including Chrome, Edge, Safari, Opera, and Firefox.

Source
LanguageTool: What does LanguageTool Premium offer?

LanguageTool Premium increases the character limit to 150,000 per text field, provides unlimited AI paraphrasing, and includes 20,000+ advanced grammar and style checks. Multiple billing options are available including monthly, quarterly, annual, and 2-year plans.

Source
Tampermonkey: Is Tampermonkey available on all browsers?

Yes, Tampermonkey is available on Chrome 120 and later, Microsoft Edge, Safari, Opera Next, and Firefox with no cost.

Source
LanguageTool: Does LanguageTool offer a money-back guarantee?

Yes, LanguageTool provides a 14-day money-back guarantee on all Premium packages with no period of notice required; cancel anytime.

Source
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