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Fello AI vs assistant-ui

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Fello AI compared with assistant-ui
DetailFello AI logo Fello AIassistant-ui logo assistant-ui
What it doesAll the best AI models in one native app for Mac, iPhone and iPad Open-source React components and runtimes for building AI chat
StageNot given Not given
FoundedNot given Not given
Based inNot given US
Pricing modelFreemium Open source
PricingFree version with 5 questions per hour with premium models; premium subscription available for unlimited access The core library is free and MIT licensed. assistant-cloud offers: Free ($0, 200 MAU included), Pro ($50/mo, 500 MAU included plus $0.10 per additional MAU), Enterprise (custom MAU pricing, contact for details).
Key features
  • Access 20+ AI models including GPT-6, Claude, Gemini, DeepSeek, Grok and Kimi
  • Convert files to different formats (PDF to Word, Excel, PowerPoint)
  • Web search with sources cited
  • Upload and chat with multiple files simultaneously
  • Reasoning mode for complex problems
  • Multi-language support for prompts and interface
  • Streaming support for real-time chat output
  • Tool execution and integration
  • Thread persistence and history
  • Voice support
  • Generative UI rendering
  • Message attachments
  • Conversation branching
  • Multi-platform support (React, Vue, React Native, Ink)
  • Runtime adapter support (AI SDK, LangGraph, LangChain)
  • Fully customizable component composition
What makes it different
  • Switch between multiple AI models mid-conversation without separate subscriptions
  • Native app optimized for Mac, iPhone and iPad with full cross-device sync
  • All conversations stored locally on device with no data saved to servers
  • One subscription covers Mac, iPhone and iPad
  • Create and export real files (documents, spreadsheets, images, podcasts)
  • Works with any backend through pluggable runtime adapters
  • Complete source code available for customization via CLI
  • Production-ready runtime handling streaming, tools, and state
  • Free MIT license with optional paid cloud persistence
  • Cross-platform support with single chat model
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)58 −1 (down) since last check53 +1 (up) since last check
Trust Flow (Majestic)1812
Citation Flow (Majestic)4339
Referring domains (Majestic)1512572

5 details filled in for both companies.

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