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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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Fathom
S
Khanmigo
S
Hex
A
Perplexity
S
TaglineMeeting notes, free forever for individuals.Khan Academy's AI tutor. Socratic method, built for learning.Modern data notebook with Magic AI assistant.AI search done right. Cited answers, not chat theater.
CategoryMeetingsEducationDataResearch
PricingFree for individuals + $15-$29/user/mo teams$4/mo (free for teachers)Free + $28+/user/moFree + $20/mo Pro
Best forSolo operators, freelancers, small teams on a budget.Students K-12. Parents helping with homework. Teachers prepping lessons.Data teams at startups + enterprises.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Socratic — doesn't give answers, asks questions
  • Trusted by schools + parents
  • Integrated with Khan Academy curriculum
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Bot-joining model
  • Team features gated
  • K-12 focus (not deep for adults)
  • Slower than general chatbots
  • Overkill for casual users
  • Enterprise pricing
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for solo + free. The best free option, hands down.S-tier for kids learning. The tutoring UX is legit — not a generic chatbot dressed up.A-tier for data teams. S-tier if you already live in SQL + Python.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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