We built a Managed ClickHouse service to help exactly these difficulties with that technology. We are handling sharding, clustering, zookeeper, patching, updates without downtime, and Hybrid storage based on S3. https://double.cloud
- Firebolt (Hard fork of clickhouse)
- Altinity
- Gigapipe
- Hydrolix
- Bytehouse.cloud
- https://clickhouse.com/ ("coming soon")
- TiDB (Their columnstore is a fork of clickhouse)
I stopped tracking after this. I saw a few press releases go by announcing a few others as well which I lost now.
The official Clickhouse Inc. is surely going to be under pressure to pull features out of their open source offering over time to differentiate themselves.