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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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Devin
A
Fathom
S
Hex
A
MagicSchool
S
TaglineCognition Labs' autonomous coding engineer.Meeting notes, free forever for individuals.Modern data notebook with Magic AI assistant.AI platform built for teachers. Lesson plans + IEPs + admin.
CategoryAgentsMeetingsDataEducation
Pricing$500/moFree for individuals + $15-$29/user/mo teamsFree + $28+/user/moFree + $100/yr Plus + school plans
Best forEngineering teams offloading tickets. Ops/platform work.Solo operators, freelancers, small teams on a budget.Data teams at startups + enterprises.Teachers prepping materials. School districts.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
  • 60+ teacher-specific tools
  • Generous free tier
  • FERPA + COPPA compliant for schools
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Bot-joining model
  • Team features gated
  • Overkill for casual users
  • Enterprise pricing
  • Teacher-only focus
  • Less useful for students
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for solo + free. The best free option, hands down.A-tier for data teams. S-tier if you already live in SQL + Python.S-tier for teachers. If you teach K-12, start here this week.
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