Free
Tidb
TiDB Cloud is a fully managed distributed SQL database service by PingCAP that supports scalable OLTP and HTAP workloads with MySQL compatibility, designed for cloud-native applications.
Enterprise
Weaviate
Weaviate is an open-source vector search engine that enables semantic search by storing and querying data using vector embeddings, supporting hybrid search and knowledge graph capabilities.
Free
ChartDB
ChartDB is an open source time series database designed for efficient storage and querying of large-scale metrics and monitoring data. It supports high ingestion rates, SQL-like queries, and integrates with visualization tools like Grafana.
Enterprise
qdrant.io
Qdrant is an open-source vector search engine that enables scalable, real-time semantic search and AI-powered applications by efficiently managing and querying high-dimensional vector data.