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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
Lex
A
Devin
A
TaglineMeeting notes, free forever for individuals.Google Docs with an AI collaborator baked in.Cognition Labs' autonomous coding engineer.
Categorymeetingwritingagents
PricingFree for individuals + $15-$29/user/mo teamsFree + $12/mo$500/mo
Best forSolo operators, freelancers, small teams on a budget.Essays, long-form drafts, thinking on the page.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Bot-joining model
  • Team features gated
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for solo + free. The best free option, hands down.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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