System and techniques secure group data exchange are described herein. A template may be obtained from local store. The template defines data segments and operations on data segments. A data segment definition may be extracted from the template. The data segment definition including a set of demographic values. An external store may be queried for external data segments with a definition including at least one demographic value from the set of demographic values. The data segments include an owner entity. A scenario may be executed in accordance with the template using a local data segment and the external data segments to produce an experimental result. The experimental result may be communicated to the owner entity.