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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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Hex
A
Lex
A
Groq
S
Fathom
S
TaglineModern data notebook with Magic AI assistant.Google Docs with an AI collaborator baked in.The fastest AI inference in the world. Crazy low latency.Meeting notes, free forever for individuals.
CategoryDataWritingDev PlatformMeetings
PricingFree + $28+/user/moFree + $12/moFree tier + pay-as-you-go APIFree for individuals + $15-$29/user/mo teams
Best forData teams at startups + enterprises.Essays, long-form drafts, thinking on the page.Developers who need sub-100ms LLM responses.Solo operators, freelancers, small teams on a budget.
Strengths
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
Weaknesses
  • Overkill for casual users
  • Enterprise pricing
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Bot-joining model
  • Team features gated
Kai's verdictA-tier for data teams. S-tier if you already live in SQL + Python.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for speed. When latency is the product, start here.S-tier for solo + free. The best free option, hands down.
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