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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
Gemini
A
v0
S
Rows
A
TaglineSEO-first AI writer. Optimized for ranking content.Google's answer. Best integrated with Workspace + free for a lot.Vercel's AI-powered UI generator. Prompt to shadcn component.Spreadsheets with AI + live integrations baked in.
CategoryMarketingChatbotsDesignData
PricingFree + $15-$99/moFree + $20/mo Advanced (bundled with 2TB Drive)Free + $20/moFree + $19-$89/user/mo
Best forContent marketers churning out SEO articles.Anyone already on Google, research tasks, summarizing long documents.Frontend devs, PMs prototyping UIs, anyone on Next.js.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • SEO built-in (Surfer integration)
  • Article generator for long-form
  • Chatsonic for research
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Output quality behind Claude for polish
  • SEO automation can produce generic content
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Best for shadcn stack
  • Iterating can be fiddly
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictB-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.S-tier. If you're on Vercel/shadcn, this is cheating.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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