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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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S
Jasper
B
Skye
A
TaglineRun any open-source AI model with an API call.Marketing-first AI writing. Brand voice + campaign tools.An agentic iPhone home screen that replaces your static icon grid with AI widgets that proactively surface health, calendar, finance, and local context — without you having to open a single app.
CategoryDev PlatformMarketingAgents
PricingPay per second of compute$49-$129/moWaitlist / Beta (pricing not yet disclosed)
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Marketing teams that need brand-consistent output at scale.iPhone power users who are frustrated that Siri is still reactive and want their home screen to actually anticipate their day.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Brand voice memory + guidelines
  • Templates for every marketing channel
  • Team-grade content review
  • Ambient, proactive intelligence delivered via native iOS widgets — no app-switching required
  • Cross-domain context: health, calendar, email, finances, and local recommendations in one layer
  • Works within iOS permission model (no jailbreak or sideloading), making App Store approval plausible
  • Strong pre-launch signal: 25k+ waitlist and backing from a16z, True Ventures, and SV Angel
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Pricey vs Claude/ChatGPT
  • Less flexible than raw chatbot
  • Still pre-launch / beta — zero proven track record and no public pricing yet
  • iPhone-only by design, which immediately locks out half the smartphone market
  • Battery drain and privacy concerns from constant ambient context scanning are real and unresolved
Kai's verdictS-tier for open-source model APIs. The default in this space.B-tier for individuals — Claude does this for less. A-tier for teams needing brand consistency.The concept is genuinely compelling — turning the home screen into a living AI layer is a smarter bet than yet another chat interface — but this is vaporware until it ships publicly and we see whether Apple's sandbox lets it breathe. (Verdict pending Phi's full review.)
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