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Grammarly vs Lex

A side-by-side comparison of Grammarly and Lex, two Writing tools, drawn from Ignaite's continuously-verified listings.

Compared from listings verified as of

Grammarly

Writing

AI writing assistant for grammar, tone, clarity, and generative drafting.

View Grammarly

Lex

Writing

AI-native collaborative document editor for serious writers.

View Lex

At a glance

Feature comparison of Grammarly and Lex
AttributeGrammarlyLex
CategoryWritingWriting
PricingFREEMIUMFREEMIUM
LicenseProprietaryProprietary
DeploymentCloudCloud
Platforms (differs)Web, Browser extension, Windows, macOS, iOS, AndroidWeb
Model supportMulti-modelMulti-model
Vendor (differs)GrammarlyLex

The honest brief

Grammarly

Runs system-wide across browsers, desktop, and mobile keyboards, so corrections follow you into any app.

  • Works in 1M+ apps and sites
  • Real-time grammar/clarity/tone checks
  • Browser, desktop, and mobile keyboard
  • Plagiarism + AI-text detection on paid tiers
  • Monthly AI prompt caps per tier
  • Over-corrects style at times
  • Weak at long-form generation
  • Passive assistant, can't take actions

Lex

Frontier models inside a focused Google-Docs-style writing surface — pick premium models in the doc, not a sidebar.

  • Clean, distraction-free doc editor
  • Premium model choice (Claude/GPT)
  • Real-time collaboration + versions
  • AI feedback and rewriting inline
  • Web-only
  • Premium models behind Pro tier
  • Narrow long-form focus
Grammarly detailsLex detailsAll Writing apps