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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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Fathom
S
Groq
S
Perplexity
S
Sudowrite
S
TaglineMeeting notes, free forever for individuals.The fastest AI inference in the world. Crazy low latency.AI search done right. Cited answers, not chat theater.AI writing tool built specifically for fiction writers.
CategoryMeetingsDev PlatformResearchWriting
PricingFree for individuals + $15-$29/user/mo teamsFree tier + pay-as-you-go APIFree + $20/mo Pro$19-$59/mo
Best forSolo operators, freelancers, small teams on a budget.Developers who need sub-100ms LLM responses.Replacing Google for any question where you want a cited answer in seconds.Novelists, screenwriters, fiction short-form writers.
Strengths
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
Weaknesses
  • Bot-joining model
  • Team features gated
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Pricey for casual use
  • Fiction-only focus — not for business writing
Kai's verdictS-tier for solo + free. The best free option, hands down.S-tier for speed. When latency is the product, start here.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.
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