Letta is the platform for building stateful agents: AI with advanced memory that can learn and self-improve over time.
Universal memory layer for AI Agents
Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search
Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/