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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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Grammarly
A
Reflect
A
Ollama
S
Lex
A
TaglineGrammar check + tone + AI drafting, everywhere you type.AI-powered networked notes. Roam with a brain.Run LLMs locally. One-line install, GUI optional.Google Docs with an AI collaborator baked in.
CategoryWritingProductivityDev PlatformWriting
PricingFree + $12-$15/mo Premium + team plans$10/moFree + open sourceFree + $12/mo
Best forNon-native English writers, business email, anyone who types a lot.Knowledge workers + thinkers who want AI in their second brain.Devs wanting offline/local LLMs for privacy or experimentation.Essays, long-form drafts, thinking on the page.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
  • Run Llama, Mistral, Qwen, etc. on your laptop
  • Simple CLI + API
  • Hardware-aware (picks the right quant)
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Expensive for just notes
  • Smaller community than Obsidian
  • Needs beefy laptop for larger models
  • Speed way behind cloud APIs
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.A-tier. Niche but beloved. If you've outgrown Notion, try this.S-tier for local inference. If you care about privacy or want to tinker, install this today.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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