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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
Pick tools (3 selected)
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Lex
A
GitHub Copilot
B
Grammarly
A
TaglineGoogle Docs with an AI collaborator baked in.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Grammar check + tone + AI drafting, everywhere you type.
Categorywritingcodingwriting
PricingFree + $12/moFree (limited) + $10/mo Pro + $19/mo BusinessFree + $12-$15/mo Premium + team plans
Best forEssays, long-form drafts, thinking on the page.Teams with GitHub already. Devs who don't want to change IDEs.Non-native English writers, business email, anyone who types a lot.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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