Technology is incredibly important to the success of professional services. Various platforms and applications are required to identify projects to be delivered, track consulting engagements in progress, and to correctly bill for services when projects are complete. TSIA has identified 10 separate applications categories recommended for highly productive, scalable PS teams, including core infrastructure technology, productivity tools, and tools to understand and track customer behavior and sentiment. In this report, TSIA Research defines the recommended technology stack for professional services and lists the top-installed vendors in each technology category. Professional services executives should understand which enabling technology components are already well adopted, as well as emerging tools that may provide a boost to operational and financial metrics.