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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
Fathom
S
Claude Agent SDK
S
Kling
A
Perplexity
S
TaglineMeeting notes, free forever for individuals.Anthropic's SDK for building your own agents on Claude.Kuaishou's video model. The surprise standout.AI search done right. Cited answers, not chat theater.
CategoryMeetingsAgentsVideoResearch
PricingFree for individuals + $15-$29/user/mo teamsAPI usage + SDK is freeCredit-based, free trialFree + $20/mo Pro
Best forSolo operators, freelancers, small teams on a budget.Developers building custom agents for their own company/product.Anyone who wants top-tier video quality for less.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Bot-joining model
  • Team features gated
  • Developer-only
  • You build the UI
  • UX is rough for English speakers
  • Queue times
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for solo + free. The best free option, hands down.S-tier for builders. The right primitives. What Kai is built on under the hood.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.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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