Open-source OLAP database designed for real-time analytics at scale.

49.5k stars8.9k forksApache-2.0last commit Actively maintained
Serverless, fully managed cloud data warehouse on Google Cloud for storing and analyzing large datasets with ANSI SQL. Provides scalable, columnar storage, separation of storage and compute, integrated analytics, and built-in ML and BI integrations.
Open-source OLAP database designed for real-time analytics at scale.

49.5k stars8.9k forksApache-2.0last commit Actively maintained
Apache Druid is a real-time analytics (OLAP) database delivering sub-second queries on streaming and batch data with high concurrency at scale.

14k stars3.8k forksApache-2.0last commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 2 shipped a commit in the last six months. Licences in this list: Apache-2.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Time-Series Databases.