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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
OpenRouter
S
Fireflies
A
Hume AI
A
Rows
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Sales-focused meeting AI with CRM integration.Voice AI that reads + expresses emotion.Spreadsheets with AI + live integrations baked in.
CategoryDev PlatformMeetingsVoiceData
PricingPay per token — model-dependentFree + $10-$19/user/moFree tier + pay-as-you-goFree + $19-$89/user/mo
Best forDevelopers experimenting across models. Apps that want fallback logic.Sales teams, customer success, anyone running many discovery calls.Therapy apps, customer service, any voice agent where emotion matters.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
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • 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
  • Slight markup over direct API
  • Some provider features not exposed
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Niche use case
  • Pricing ramps fast
  • 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 for sales teams. B-tier for solo users.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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