Between webcasting, webconferencing, and videoconferencing tools, the market for delivering slide presentations to a live audience is full of substitutes. Different products vary in their scalability to large audiences and in how customers use them for internal or external events, with or without video, and in managed or self-service models. This report provides a framework for buyers to evaluate products according to their event life-cycle requirements and uses five segmentation criteria to summarize the major differences in how customers use them.