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.
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.