olap

Apache Doris is a real-time analytics and hybrid search database for AI agents.

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

Dinky is a real-time data development platform based on Apache Flink, enabling agile data development, deployment and operation.

Open-source semantic layer: one cube for Excel (MDX/XMLA), dashboards, and AI agents (MCP). Mondrian + Apache Calcite.

Mondrian is an Online Analytical Processing (OLAP) server that enables business users to analyze large quantities of data in real-time.

An efficient storage and compute engine for both on-prem and cloud-native data analytics.

An open-source columnar data format designed for fast & realtime analytic with big data.

Flink Connector for Apache Doris

AI 时代的智能数据库

Cluster manager for Apache Doris

Pivot4J provides a common API for OLAP servers which can be used to build an analytical service frontend with pivot style GUI.

Spark Connector for Apache Doris

A Simple and Efficient Distributed Multidimensional BI Analysis Engine.

AbationGraph® is a time-series knowledge graph database for real-time data analysis

The educational analytic storage engine derived from Pixels (https://github.com/pixelsdb/pixels).

CQRS implementation using Debezium + Spring Cloud Stream + Kafka Connect + Kafka + Druid

Kafka Connector for Apache Doris

Benchmark suite to evaluate HTAP database engines

Datafor is a data visualization and analytics platform.