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Browser Extensions · head to head

LanguageTool vs Stay

LanguageTool logo

LanguageTool

Browser Extensions

Grammar and spell checker for 25+ languages

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: LanguageTool free tier limited to basic spelling and simple punctuation; advanced punctuation and style issues caught only on premium; Stay apple only. No Chrome, Firefox or Edge build, so it cannot serve a cross-browser workflow.
  • They diverge on capability: LanguageTool covers Multi-language support, 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 LanguageTool and Stay actually diverge.

Attributes where LanguageTool and Stay differ
AttributeLanguageToolStay
Pricing modelfreemiumone-time
PlatformsWeb editor, Windows desktop app, macOS desktop app, Chrome extension, Firefox extension, Edge extension, Safari extension, Opera extension, Google Docs, Microsoft Word, iOS appSafari, iOS, macOS
Founded2003Unknown

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
  • Chrome support
  • Firefox support
  • Edge support
  • Safari 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.

LanguageTool

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

Stay

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

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

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

Stay

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

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 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 LanguageTool or Stay better?
Neither clearly leads. LanguageTool 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, LanguageTool or Stay?
LanguageTool starts at Free and Stay at Free.
Does LanguageTool or Stay 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. Stay runs on Safari, iOS, macOS.
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 Stay is typically brought in for.
What can LanguageTool do that Stay cannot?
LanguageTool covers Multi-language support, Grammar checking, Style suggestions, Personal dictionary. Stay covers Tampermonkey and Violentmonkey compatibility, Userscript management, Cross-device bookmark sync, Download manager.

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
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
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
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
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
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
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