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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
Lovable
A
HeyGen
S
Runway
S
TaglineCognition Labs' autonomous coding engineer.Build a full app from a prompt. Stripe-ready.AI avatar videos. Record once, speak any language.The pro's AI video tool. Gen-4 is the current bar.
CategoryAgentsDesignVideoVideo
Pricing$500/moFree + $25-$100/moFree + $24-$65/moFree + $15-$95/mo
Best forEngineering teams offloading tickets. Ops/platform work.Non-devs + solopreneurs shipping MVPs.Course creators, multilingual marketers, anyone scaling video content.Marketing video, pitch decks, b-roll, creative shorts.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Complexity ceiling
  • Can generate brittle code
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Expensive at scale
  • Still needs post-editing
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.S-tier. Market leader with reason. Start here for serious video.
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