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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
Ideogram
S
Writesonic
B
v0
S
TaglineGrammar check + tone + AI drafting, everywhere you type.The one that actually gets text in images right.SEO-first AI writer. Optimized for ranking content.Vercel's AI-powered UI generator. Prompt to shadcn component.
CategoryWritingImageMarketingDesign
PricingFree + $12-$15/mo Premium + team plansFree + $8/mo + $20/mo + $60/moFree + $15-$99/moFree + $20/mo
Best forNon-native English writers, business email, anyone who types a lot.Anything with text — posters, ads, album covers, slide decks.Content marketers churning out SEO articles.Frontend devs, PMs prototyping UIs, anyone on Next.js.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
  • SEO built-in (Surfer integration)
  • Article generator for long-form
  • Chatsonic for research
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Aesthetic ceiling below Midjourney
  • Less style variety
  • Output quality behind Claude for polish
  • SEO automation can produce generic content
  • Best for shadcn stack
  • Iterating can be fiddly
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier for text-in-image. Use this for posters, Midjourney for art.B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.S-tier. If you're on Vercel/shadcn, this is cheating.
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