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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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Bolt.new (StackBlitz)
A
Grammarly
A
TaglineVS 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.
Categorycodingcodingwriting
PricingFree + $20/mo Pro + $40/mo BusinessFree + $20-$200/moFree + $12-$15/mo Premium + team plans
Best forDevelopers. 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
  • 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
  • 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 verdictS-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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