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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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GitHub Copilot
B
Cursor
S
Bolt.new (StackBlitz)
A
Grammarly
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.VS Code fork that made AI coding actually work.Prompt to deployed full-stack app in the browser.Grammar check + tone + AI drafting, everywhere you type.
Categorycodingcodingcodingwriting
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo Pro + $40/mo BusinessFree + $20-$200/moFree + $12-$15/mo Premium + team plans
Best forTeams with GitHub already. Devs who don't want to change IDEs.Developers. Non-developers who want to ship working code.PMs, founders, non-devs shipping MVPs.Non-native English writers, business email, anyone who types a lot.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Best for fast prototypes. Competitive with Lovable — try both.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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