Anybody know the differences in use cases between Pinot, druid, Clickhouse, and Rockset?

While all of them are the modern OLAP engines for real-time analytics, where Apache Pinot stands out from the rest is:

- Battle tested at really high throughput and low latency (> 200k read qps, 1M events ingestion) at places like LinkedIn, Uber and many more.
- Power of indexing (supports a wide variety of indexing schemes, including advanced ones like GeoSpatial, JSON, etc)
- Capability to upsert (mutate single row)
- Much easier to scale in/out, easier operations in general
- Much lower cost to serve as compared to others.