> "defenders" (sic: developers (?) )

Defenders are usually companies or a consultancies ERT (emergency repsonse team) or in their SOC (Security Operations Center) to monitor real time security threats to their business and Triage, mitigate, investigate, block etc.

Some of the enterprise tools (QRadar, Arcsight, EnVision) for these are really advanced but run into the 100's of thousands cost, so I think MozDef is an open sources initiative for smaller teams who don't have the resources for the above.