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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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Dev Platform
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Perplexity
S
Granola
S
Lex
A
Devin
A
TaglineAI search done right. Cited answers, not chat theater.Meeting notes that don't suck. Runs locally, no bot joins.Google Docs with an AI collaborator baked in.Cognition Labs' autonomous coding engineer.
CategoryResearchMeetingsWritingAgents
PricingFree + $20/mo ProFree + $18/moFree + $12/mo$500/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Founders, execs, consultants who live in calls.Essays, long-form drafts, thinking on the page.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • No bot in the call — runs on your Mac
  • Strong templates
  • Fast summaries
  • 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
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Mac-only
  • Single-user by design
  • 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 search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier. Category-defining UX. If you take notes in meetings, switch this week.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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