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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
Devin
A
Bolt.new (StackBlitz)
A
NotebookLM
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Cognition Labs' autonomous coding engineer.Prompt to deployed full-stack app in the browser.Google's research notebook. Turns your docs into a podcast.
Categorycodingagentscodingresearch
PricingFree (limited) + $10/mo Pro + $19/mo Business$500/moFree + $20-$200/moFree
Best forTeams with GitHub already. Devs who don't want to change IDEs.Engineering teams offloading tickets. Ops/platform work.PMs, founders, non-devs shipping MVPs.Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Google-only
  • Can be slow on large corpora
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. Best for fast prototypes. Competitive with Lovable — try both.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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