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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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Jasper
B
Grammarly
A
DeepSeek
S
Perplexity
S
TaglineMarketing-first AI writing. Brand voice + campaign tools.Grammar check + tone + AI drafting, everywhere you type.Chinese open-weight powerhouse. Crazy cheap, genuinely smart.AI search done right. Cited answers, not chat theater.
CategoryMarketingWritingChatbotsResearch
Pricing$49-$129/moFree + $12-$15/mo Premium + team plansFree web + ultra-cheap API (~$0.14/M input tokens)Free + $20/mo Pro
Best forMarketing teams that need brand-consistent output at scale.Non-native English writers, business email, anyone who types a lot.Developers + cost-conscious builders. Anyone fine with self-hosting.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Brand voice memory + guidelines
  • Templates for every marketing channel
  • Team-grade content review
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Pricey vs Claude/ChatGPT
  • Less flexible than raw chatbot
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictB-tier for individuals — Claude does this for less. A-tier for teams needing brand consistency.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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