[auganov]

http://www.consul.io/intro/vs/serf.html

[stormbrew]

"Serf is a service discovery and orchestration tool..."

"... However, Serf does not provide any high-level features such as service discovery..."

Hm...

[armon]

That can probably be worded better. Serf operates at a node level abstraction, while Consul operates at a service level. In fact, Serf is used in Consul to power the discovery of other nodes.