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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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Lex
A
Sudowrite
S
Rows
A
TaglineGoogle Docs with an AI collaborator baked in.AI writing tool built specifically for fiction writers.Spreadsheets with AI + live integrations baked in.
CategoryWritingWritingData
PricingFree + $12/mo$19-$59/moFree + $19-$89/user/mo
Best forEssays, long-form drafts, thinking on the page.Novelists, screenwriters, fiction short-form writers.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Pricey for casual use
  • Fiction-only focus — not for business writing
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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