langchain4j

langchain4j is an open-source framework for developing LLM-powered Java applications, with built-in support for integrating vector databases as memory stores.

Features

• Open-source framework for Java
• Enables development of applications powered by Large Language Models (LLMs)
• Built-in support for integrating with various vector databases as memory stores
• Modular structure with support for multiple backends and integrations, as indicated by modules for:
  • Azure AI Search
  • Azure Cosmos DB
  • Azure OpenAI
  • Amazon Bedrock
  • Cassandra
  • Chroma
  • Cohere
  • Couchbase
  • Elasticsearch
  • Google AI Gemini
  • And more
• Document loading, parsing, and transformation utilities
• Code execution engines
• HTTP client modules
• Experimental SQL modules
• Embedding store filter parsers
• Support for retrieval-augmented generation (RAG) via modules like langchain4j-easy-rag

Pricing

langchain4j is open-source and free to use under its open-source license.

Tags

open-source, LLM, Java, vector-database