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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
Rows
A
Fireflies
A
OpenAI Voice / Realtime
S
HeyGen
S
TaglineSpreadsheets with AI + live integrations baked in.Sales-focused meeting AI with CRM integration.ChatGPT's voice + the Realtime API for developers.AI avatar videos. Record once, speak any language.
CategoryDataMeetingsVoiceVideo
PricingFree + $19-$89/user/moFree + $10-$19/user/moVoice included with ChatGPT Plus; Realtime API by usageFree + $24-$65/mo
Best forOps teams, marketers, anyone building dashboards from multiple sources.Sales teams, customer success, anyone running many discovery calls.Voice chat users, developers building voice agents on OpenAI.Course creators, multilingual marketers, anyone scaling video content.
Strengths
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
Weaknesses
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
Kai's verdictA-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier for sales teams. B-tier for solo users.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.
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