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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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Gamma
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TaglineEnterprise-grade TTS with voice cloning.Run any open-source AI model with an API call.AI slide decks that don't look AI-generated.
CategoryVoiceDev PlatformProductivity
PricingFree + $39-$99/moPay per second of computeFree + $10-$20/mo
Best forPodcasters + enterprises where cost matters.Developers using open-source models (Flux, SDXL, Whisper, etc).Pitch decks, proposals, internal presentations — fast.
Strengths
  • Strong API + enterprise features
  • Good voice variety
  • Lower cost than ElevenLabs at scale
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Voice realism slightly behind ElevenLabs
  • UX less polished
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictA-tier. Great price/performance. Go here if ElevenLabs is too expensive.S-tier for open-source model APIs. The default in this space.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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