HeyOtto 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.

HeyOtto compared with assistant-ui
Detail	HeyOtto	assistant-ui
What it does	AI platform for kids and teens ages 8-18 with parental controls and full conversation visibility	Open-source React components and runtimes for building AI chat
Stage	Startup	Not given
Founded	2025	Not given
Based in	US	US
Pricing model	Freemium	Open source
Pricing	Free plan: 100 messages/month, 1 adult + 1 child account, core safety features. Pro plan: $9.99/month or $7.99/month billed yearly with unlimited messages, 500 tokens per month, advanced AI models, web search, and priority support. Additional users on Pro plan: $5/month each.	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	AI Assistant for homework help and creative projects Real-time content filtering and monitoring Web search with cited sources Learn to code feature Group chat for families Voice chat capability Customizable family values and topic restrictions Marketplace for sharing and remixing kid-created projects	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	Designed for kids ages 8-18 from the ground up, not retrofitted general AI Full parent visibility and real-time conversation monitoring COPPA-compliant with privacy by design and no data selling Safety built into infrastructure, not added as a setting AI guides students to think critically rather than just providing answers	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)	28 −6 (down) since last check	53 +1 (up) since last check
Trust Flow (Majestic)	20	12
Citation Flow (Majestic)	32	39
Referring domains (Majestic)	130	572

6 details filled in for both companies.

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