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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
Audio
Research
Agents
Coding
Chatbots
Image
Video
Voice
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Fireflies
A
Rows
A
Hume AI
A
OpenRouter
S
TaglineSales-focused meeting AI with CRM integration.Spreadsheets with AI + live integrations baked in.Voice AI that reads + expresses emotion.One API, every model. Pay-as-you-go, no subscriptions.
CategoryMeetingsDataVoiceDev Platform
PricingFree + $10-$19/user/moFree + $19-$89/user/moFree tier + pay-as-you-goPay per token — model-dependent
Best forSales teams, customer success, anyone running many discovery calls.Ops 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.
Strengths
  • 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
  • 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
Weaknesses
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • 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
Kai's verdictA-tier for sales teams. B-tier for solo users.A-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.
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