Kentik is an American network observability, network monitoring and anomaly detection company headquartered in San Francisco, California.

Kentik's underlying data engine is a clustered datastore modeled on Dremel.

[5] The engine collects and correlates live operational data from Internet routers and switches to produce network activity and health information.

Since November 2020, Kentik has been the organizational home of Doug Madory's Internet routing analysis practice, previously associated with Renesys and Renesys' subsequent acquirers DynDNS and Oracle.

While employed by Kentik, Madory discovered the Global Resource Systems IP address hijacking which occurred during the final hours of the Trump administration[6][7][8][9] and was the first to accurately quantify the 2021 Facebook outage, the largest communications outage in history.