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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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Dev Platform
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Manus
S
Windsurf
A
Rows
A
Sudowrite
S
TaglineAutonomous AI agent that actually finishes tasks.Codeium's agentic IDE. Cascade agent + strong free tier.Spreadsheets with AI + live integrations baked in.AI writing tool built specifically for fiction writers.
CategoryAgentsCodingDataWriting
PricingFree tier + $39-$199/moFree + $15/mo ProFree + $19-$89/user/mo$19-$59/mo
Best forPeople who want to hand off tasks entirely — trip planning, research, spreadsheet building.Developers who want Cursor-like power for less money.Ops teams, marketers, anyone building dashboards from multiple sources.Novelists, screenwriters, fiction short-form writers.
Strengths
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
Weaknesses
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Smaller community
  • Model selection more limited
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Pricey for casual use
  • Fiction-only focus — not for business writing
Kai's verdictS-tier in the agent category. The first one I'd give to a non-technical friend.A-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.
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