Consolidation, failures, and aggressive repositioning by technology vendors are inevitable, leading to a confusing landscape. Anchor providers like Google and Microsoft have gaps that hundreds of mainstream and point solution providers are filling. Workers can easily tap this vast ecosystem to support individual teams and projects. This report aims to help application development and delivery (AD&D) professionals make informed decisions on technologies in a rapidly changing enterprise collaboration (EC) landscape. This is an update of a previously published report; Forrester reviews and revises it periodically for continued relevance and accuracy.