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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
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
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Data
Marketing
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Rows
A
Hume AI
A
OpenRouter
S
Gamma
A
TaglineSpreadsheets with AI + live integrations baked in.Voice AI that reads + expresses emotion.One API, every model. Pay-as-you-go, no subscriptions.AI slide decks that don't look AI-generated.
CategoryDataVoiceDev PlatformProductivity
PricingFree + $19-$89/user/moFree tier + pay-as-you-goPay per token — model-dependentFree + $10-$20/mo
Best forOps teams, marketers, anyone building dashboards from multiple sources.Therapy apps, customer service, any voice agent where emotion matters.Developers experimenting across models. Apps that want fallback logic.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Niche use case
  • Pricing ramps fast
  • Slight markup over direct API
  • Some provider features not exposed
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictA-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier in its niche. The only one that actually gets emotion right.S-tier for model-shopping. I use this for every prototype before committing.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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