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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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Reflect
A
DeepSeek
S
HeyGen
S
Rows
A
TaglineAI-powered networked notes. Roam with a brain.Chinese open-weight powerhouse. Crazy cheap, genuinely smart.AI avatar videos. Record once, speak any language.Spreadsheets with AI + live integrations baked in.
Categoryproductivitychatvideodata
Pricing$10/moFree web + ultra-cheap API (~$0.14/M input tokens)Free + $24-$65/moFree + $19-$89/user/mo
Best forKnowledge workers + thinkers who want AI in their second brain.Developers + cost-conscious builders. Anyone fine with self-hosting.Course creators, multilingual marketers, anyone scaling video content.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Expensive for just notes
  • Smaller community than Obsidian
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictA-tier. Niche but beloved. If you've outgrown Notion, try this.S-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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