AgentbaseAI Inc.
assistant-ui provides an open-source TypeScript/React library and backend-as-a-service to help frontend developers add production-grade AI chat interfaces to their applications, enabling them to build the UX of ChatGPT in their own apps.
Founding Story
After spending two years building Gen-AI prototypes and products, Simon Farshid realized all software would soon require natural language interfaces. Seeking a high-quality UX similar to ChatGPT for his own apps and finding no adequate market solutions, he created assistant-ui. He has wanted to build a developer tool company since high school and created assistant-ui after needing a ChatGPT-like interface for a previous app project.
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Leadership
Founders
Simon Farshid
Founder in Residence at Antler (January 2023 – September 2024); Co-Founder & CTO at READO (October 2021 – September 2022); Consultant Strategy and Planning at DZ BANK AG (February 2021 – September 2021); Research Assistant at Frankfurt School of Finance & Management (April 2018 – June 2019); Studied at University of Victoria and Frankfurt School of Finance & Management
Executive Team
Simon Farshid
Founder & CEO
Founder in Residence at Antler; Co-Founder & CTO at READO; Consultant at DZ BANK AG; Research Assistant at Frankfurt School of Finance & Management
Business Model
Revenue Model
Dual model: Open-source MIT-licensed library (free forever) + SaaS backend service (assistant-cloud) with usage-based pricing and enterprise plans
Pricing Tiers
Forever free and open source with customizable UI components, bring your own backend, and community support
200 MAU included, chat history, thread management
500 MAU included, $0.10 per additional MAU, chat history, thread management, early access to new features
Custom MAU pricing, your own backend integration, data replication, dedicated support, 99.99% uptime SLA, on-premises deployment
Target Markets
- Frontend developers
- React developers
- AI/ML engineers
- Product teams building AI features
- SaaS companies adding AI chat
- Enterprise software companies
- Building GPT wrappers
- In-app copilots
- Agentic systems
- Conversational AI agents
- LLM observability tools
- AI-powered mortgage analysis
- LangChain
- Stack AI
- Browser Use
- Athena Intelligence
History & Milestones
Crossed 10,000 weekly downloads on npm for the first time
Raised $500K seed round led by Y Combinator
Joined Y Combinator W25 batch
AgentbaseAI Inc. incorporated in California
assistant-ui publicly launched as open-source AI chat component for React
2 AI Tools by AgentbaseAI Inc.
Tool UI
2moReact components for building AI chat interfaces with tool calling that integrates with assistant-ui for LLM-powered interactions.
assistant-ui
3moTypeScript/React library that provides customizable chat UI components and an optional managed backend to build and deploy conversational AI applications.
