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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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Devin
A
Bolt.new (StackBlitz)
A
Cursor
S
Perplexity
S
TaglineCognition Labs' autonomous coding engineer.Prompt to deployed full-stack app in the browser.VS Code fork that made AI coding actually work.AI search done right. Cited answers, not chat theater.
CategoryAgentsCodingCodingResearch
Pricing$500/moFree + $20-$200/moFree + $20/mo Pro + $40/mo BusinessFree + $20/mo Pro
Best forEngineering teams offloading tickets. Ops/platform work.PMs, founders, non-devs shipping MVPs.Developers. Non-developers who want to ship working code.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • 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
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-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 coding. If you write code of any kind, this pays back the $20 in a day.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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