Question Base 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.

Question Base compared with assistant-ui
Detail	Question Base	assistant-ui
What it does	AI Answer Agent for Slack that answers repetitive questions from your team using your documentation	Open-source React components and runtimes for building AI chat
Stage	Not given	Not given
Founded	2022	Not given
Based in	US	US
Pricing model	Paid	Open source
Pricing	Proof of Concept: $1,000 for 2 months. Annual Pro: Starting at $6,000/year ($5/user/month paid annually). Enterprise+: Starting at $20,000/year ($15/user/month paid annually).	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	Instant answers from Slack with 3.2-second response time Integrations with Google Drive, Confluence, Notion, Salesforce and 10+ other platforms Answer verification and control by knowledge experts Duplicate detection and answer insights Performance dashboard tracking automation rate and question performance Escalation workflow to route unanswered questions to human experts Knowledge capture and FAQ creation from chat conversations Role permissions and access controls Customizable agent prompts and behavior settings	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	99.99% accuracy on verified answers with expert control Usage-based pricing without expensive per-seat licenses Continuous learning that improves automation rates over time Measurable ROI with 90% of repetitive questions auto-answered	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)	49 +1 (up) since last check	53 +1 (up) since last check
Trust Flow (Majestic)	22	12
Citation Flow (Majestic)	37	39
Referring domains (Majestic)	362	572

6 details filled in for both companies.

More alternatives to Question Base More alternatives to assistant-ui