langchain4j vs open-webui
A neutral, constraint-first comparison - live GitHub stats and typed relationships, not marketing.
| langchain4j | open-webui | |
|---|---|---|
| Tagline | LangChain4j: Java-friendly Library for LLM Integration | User-friendly AI Interface (Supports Ollama, OpenAI API, ...) |
| Stars | 13k | 145k |
| Forks | 2.4k | 21k |
| Open issues | 785 | 338 |
| Language | Java | Python |
| License | Apache-2.0 | Other |
| Last pushed | Jul 7, 2026 | Jul 2, 2026 |
| Categories | LLM Frameworks, Developer Tools, Data & Retrieval | LLM Frameworks, Inference & Serving |
langchain4j
An idiomatic, open-source Java library that facilitates building applications powered by large language models (LLMs) and vector databases. It offers a unified API across multiple LLM providers and vector stores, making it easy to switch between different technologies without code rewriting.
Java
open-webui
Open WebUI is an extensible and feature-rich self-hosted AI platform that supports various LLM runners like Ollama and OpenAI-compatible APIs. It includes a built-in inference engine for RAG operations.
Python