Sidekick by OpenHand 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.

Sidekick by OpenHand compared with assistant-ui
Detail	Sidekick by OpenHand	assistant-ui
What it does	An AI companion for your telehealth visit	Open-source React components and runtimes for building AI chat
Stage	MVP	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Free	Open source
Pricing	Early access is free during the limited early access program.	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	Real-time conversation following during telehealth visits Medical term explanations Question suggestions during visits Visit recap and summary Desktop app for macOS and Windows	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	Explains medical terminology in real-time during conversations No AI model training on identifiable health data	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 plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	3 −1 (down) since last check	53 +1 (up) since last check
Trust Flow (Majestic)	18	12
Citation Flow (Majestic)	19	39
Referring domains (Majestic)	56	572

5 details filled in for both companies.

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