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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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OpenAI Voice / Realtime
S
Fireflies
A
Replicate
S
TaglineSpreadsheets with AI + live integrations baked in.ChatGPT's voice + the Realtime API for developers.Sales-focused meeting AI with CRM integration.Run any open-source AI model with an API call.
CategoryDataVoiceMeetingsDev Platform
PricingFree + $19-$89/user/moVoice included with ChatGPT Plus; Realtime API by usageFree + $10-$19/user/moPay per second of compute
Best forOps teams, marketers, anyone building dashboards from multiple sources.Voice chat users, developers building voice agents on OpenAI.Sales teams, customer success, anyone running many discovery calls.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictA-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.A-tier for sales teams. B-tier for solo users.S-tier for open-source model APIs. The default in this space.
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