Bee is a Swarm client implemented in Go. It’s the basic building block for the Swarm network: a private; decentralized; and self-sustaining network for permissionless publishing and access to your (application) data.
Swarm Beekeeper is an orchestrator that can manage a cluster of Bee nodes and call into their API. It allows various scenario’s to be performed on these nodes. The Swarm team uses Beekeeper internally for integration tests.