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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
Replit Agent
A
Devin
A
TaglineMeeting notes, free forever for individuals.Replit's AI that builds + deploys full apps on their platform.Cognition Labs' autonomous coding engineer.
CategoryMeetingsCodingAgents
PricingFree for individuals + $15-$29/user/mo teams$10-$25/mo Core/Teams$500/mo
Best forSolo operators, freelancers, small teams on a budget.Teachers, students, prototypers, hackathon builders.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Full-stack + DB + auth + deploy in one environment
  • Great for teaching/learning
  • Runs everything in-browser
  • 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
  • Locked into Replit hosting
  • Less code quality than dedicated IDEs
  • 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. Best for teaching a kid to code in 2026.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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