Milvus

Milvus is a cloud-native, distributed vector database designed for massive-scale AI applications. It is built to handle billions of vectors and is highly optimized for distributed environments, making it a favorite for large enterprises and research institutions. Milvus offers a wide range of indexing algorithms and is highly configurable, allowing teams to tune performance for their specific use cases. While it has a steeper learning curve than managed services, its ability to handle extreme scale and high availability is unmatched in the open-source space.