LibreChat

Update 07/2026: ClickHouse acquired LibreChat (announced November 2025). The project remains fully MIT-licensed - the acquisition is primarily a stability plus (funded maintainers, continued releases), while the strategic direction under ClickHouse ("agentic data stack") is worth watching.

In direct comparison with OpenWebUI, the unrestricted MIT license has become LibreChat's strongest argument for commercial and white-label scenarios (OpenWebUI now requires an enterprise license for branding changes).

LibreChat is an open-source project that provides a feature-rich, ChatGPT-style user interface focused on extensibility, API compatibility, and local control.

Similar to OpenWebUI it offers a customizable user interface and can be self-hosted, ensuring data privacy and full control over the dataflow. An active community drives continuous development and new features.

Architecture and Use Cases

LibreChat is built on a Node.js backend stack (Express, MongoDB) with a React frontend. Conversation data is persisted and searchable.

Features

• Supported different LLM backends (OpenAI, Azure OpenAI, OpenRouter, LocalAI, etc.)
• Tool integrations for file uploads, web search, code interpreter
• Speech support
• Extendable (Agents, Plugins)
• ...

Ressources

• GitHub Repository
• Documentation