FoundationDB is used at Datadog as the metadata store for Husky, the storage and query engine powering a significant number of Datadog products, such as logs, network performance monitoring, and trace analytics.

1. https://www.datadoghq.com/blog/engineering/introducing-husky...

2. https://www.datadoghq.com/blog/engineering/husky-deep-dive/

3. https://www.youtube.com/watch?v=mNneCaZewTg

4. https://www.youtube.com/watch?v=1-zo9jqdRZU

I was involved with this project from the beginning and it would've taken significantly longer to deliver without FoundationDB.