Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory with small models for free
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Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database.
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 (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
OceanBase is the unified distributed database for the AI era — open-source, multi-model, one engine for your most demanding workloads.