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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.
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Grammarly
A
GitHub Copilot
B
Ollama
S
Claude Code
S
TaglineGrammar check + tone + AI drafting, everywhere you type.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Run LLMs locally. One-line install, GUI optional.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
Categorywritingcodingdev platformcoding
PricingFree + $12-$15/mo Premium + team plansFree (limited) + $10/mo Pro + $19/mo BusinessFree + open sourcePart of Claude Pro/Max/Team plans
Best forNon-native English writers, business email, anyone who types a lot.Teams with GitHub already. Devs who don't want to change IDEs.Devs wanting offline/local LLMs for privacy or experimentation.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Run Llama, Mistral, Qwen, etc. on your laptop
  • Simple CLI + API
  • Hardware-aware (picks the right quant)
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Needs beefy laptop for larger models
  • Speed way behind cloud APIs
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for local inference. If you care about privacy or want to tinker, install this today.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
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