TL;DR
langchain4j at a glance
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing to….
Overview
What is langchain4j?
langchain4j is an open-source project by langchain4j on GitHub. LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (includ… It has 13,078 stars on GitHub. Commonly categorised as HR. All credit belongs to the maintainers; One9Founders lists it for discovery with a link to the source.
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FAQ
Frequently asked questions
What is langchain4j and what does it do?
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing to….
What does langchain4j cost in India?
langchain4j is a paid tool.
Is langchain4j safe for startups?
langchain4j has not yet been assessed on our Security & Data Privacy criterion. Check the vendor’s own security documentation before using it for sensitive data.
How is langchain4j rated on One9Founders?
langchain4j has not yet been rated on our 10-point evaluation framework. See How We Rate for the 10-criterion framework and status definitions.
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Listed: 13 September 2026
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