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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
Lex
A
Perplexity
S
Manus
S
Pika
A
TaglineGoogle Docs with an AI collaborator baked in.AI search done right. Cited answers, not chat theater.Autonomous AI agent that actually finishes tasks.The playful, accessible AI video tool.
CategoryWritingResearchAgentsVideo
PricingFree + $12/moFree + $20/mo ProFree tier + $39-$199/moFree + $8-$58/mo
Best forEssays, long-form drafts, thinking on the page.Replacing Google for any question where you want a cited answer in seconds.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Social media creators, beginners, anyone wanting quick fun clips.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Ingredients feature — combine people, objects, scenes
  • Lip sync + sound effects
  • Fun, approachable UX
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Lower fidelity than Runway/Kling
  • Still rough on complex scenes
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier in the agent category. The first one I'd give to a non-technical friend.A-tier for social/casual. B-tier for serious work. Good entry point.
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