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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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OpenRouter
S
Hume AI
A
Fireflies
A
Rows
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Voice AI that reads + expresses emotion.Sales-focused meeting AI with CRM integration.Spreadsheets with AI + live integrations baked in.
CategoryDev PlatformVoiceMeetingsData
PricingPay per token — model-dependentFree tier + pay-as-you-goFree + $10-$19/user/moFree + $19-$89/user/mo
Best forDevelopers experimenting across models. Apps that want fallback logic.Therapy apps, customer service, any voice agent where emotion matters.Sales teams, customer success, anyone running many discovery calls.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Niche use case
  • Pricing ramps fast
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.A-tier in its niche. The only one that actually gets emotion right.A-tier for sales teams. B-tier for solo users.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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