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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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Duolingo Max
A
Fathom
S
Cursor
S
Perplexity
S
TaglineDuolingo + AI. Explain My Answer + Roleplay features.Meeting notes, free forever for individuals.VS Code fork that made AI coding actually work.AI search done right. Cited answers, not chat theater.
CategoryEducationMeetingsCodingResearch
Pricing$30/mo (or ~$168/yr)Free for individuals + $15-$29/user/mo teamsFree + $20/mo Pro + $40/mo BusinessFree + $20/mo Pro
Best forLanguage learners who've outgrown basic Duolingo.Solo operators, freelancers, small teams on a budget.Developers. Non-developers who want to ship working code.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
  • Bot-joining model
  • Team features gated
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.S-tier for solo + free. The best free option, hands down.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.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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