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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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Coding
Agents
Research
Chatbots
Image
Video
Voice
Meetings
Design
Productivity
Audio
Writing
Dev Platform
Data
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Replicate
S
Fathom
S
Lex
A
MagicSchool
S
TaglineRun any open-source AI model with an API call.Meeting notes, free forever for individuals.Google Docs with an AI collaborator baked in.AI platform built for teachers. Lesson plans + IEPs + admin.
CategoryDev PlatformMeetingsWritingEducation
PricingPay per second of computeFree for individuals + $15-$29/user/mo teamsFree + $12/moFree + $100/yr Plus + school plans
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Solo operators, freelancers, small teams on a budget.Essays, long-form drafts, thinking on the page.Teachers prepping materials. School districts.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • 60+ teacher-specific tools
  • Generous free tier
  • FERPA + COPPA compliant for schools
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Bot-joining model
  • Team features gated
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Teacher-only focus
  • Less useful for students
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for solo + free. The best free option, hands down.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for teachers. If you teach K-12, start here this week.
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