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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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Perplexity
S
Hex
A
Claude Agent SDK
S
Manus
S
TaglineAI search done right. Cited answers, not chat theater.Modern data notebook with Magic AI assistant.Anthropic's SDK for building your own agents on Claude.Autonomous AI agent that actually finishes tasks.
CategoryResearchDataAgentsAgents
PricingFree + $20/mo ProFree + $28+/user/moAPI usage + SDK is freeFree tier + $39-$199/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Data teams at startups + enterprises.Developers building custom agents for their own company/product.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • SQL + Python + no-code in one notebook
  • Magic AI writes queries + viz for you
  • Team-grade collaboration
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Overkill for casual users
  • Enterprise pricing
  • Developer-only
  • You build the UI
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier for data teams. S-tier if you already live in SQL + Python.S-tier for builders. The right primitives. What Kai is built on under the hood.S-tier in the agent category. The first one I'd give to a non-technical friend.
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