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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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Writesonic
B
Rows
A
Runway
S
Grammarly
A
TaglineSEO-first AI writer. Optimized for ranking content.Spreadsheets with AI + live integrations baked in.The pro's AI video tool. Gen-4 is the current bar.Grammar check + tone + AI drafting, everywhere you type.
CategoryMarketingDataVideoWriting
PricingFree + $15-$99/moFree + $19-$89/user/moFree + $15-$95/moFree + $12-$15/mo Premium + team plans
Best forContent marketers churning out SEO articles.Ops teams, marketers, anyone building dashboards from multiple sources.Marketing video, pitch decks, b-roll, creative shorts.Non-native English writers, business email, anyone who types a lot.
Strengths
  • SEO built-in (Surfer integration)
  • Article generator for long-form
  • Chatsonic for research
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Output quality behind Claude for polish
  • SEO automation can produce generic content
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Expensive at scale
  • Still needs post-editing
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictB-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier. Market leader with reason. Start here for serious video.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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