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Groq
S
Perplexity
S
Sudowrite
S
Fathom
S
TaglineThe 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.Meeting notes, free forever for individuals.
CategoryDev PlatformResearchWritingMeetings
PricingFree tier + pay-as-you-go APIFree + $20/mo Pro$19-$59/moFree for individuals + $15-$29/user/mo teams
Best forDevelopers 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.Solo operators, freelancers, small teams on a budget.
Strengths
  • 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
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
Weaknesses
  • 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
  • Bot-joining model
  • Team features gated
Kai's verdictS-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.S-tier for solo + free. The best free option, hands down.
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