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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
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Stable Audio
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Hume AI
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Rows
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TaglineGoogle Docs with an AI collaborator baked in.Stability AI's open audio model. Loops + SFX + background.Voice AI that reads + expresses emotion.Spreadsheets with AI + live integrations baked in.
CategoryWritingAudioVoiceData
PricingFree + $12/moFree + $12/mo Pro + enterpriseFree tier + pay-as-you-goFree + $19-$89/user/mo
Best forEssays, long-form drafts, thinking on the page.Game developers, podcasters needing SFX, video creators needing background music.Therapy apps, customer service, any voice agent where emotion matters.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
  • 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
  • Not for full songs with vocals
  • Shorter generation limits
  • Niche use case
  • Pricing ramps fast
  • 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.A-tier for its niche. Different use case than Suno — SFX and loops, not songs.A-tier in its niche. The only one that actually gets emotion right.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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