The phrase identifies a specific subset of organizations: those that are both significant participants in the project management software market and active in its creation. This implicitly limits the scope to entities with substantial market share and a dedicated development arm for such software.
Understanding the primary vendors in this sector is crucial for businesses seeking project management solutions. These companies often set industry standards, offer comprehensive feature sets, and provide robust support ecosystems. Historically, the dominance of a few major players has driven innovation and competition within the project management software space, influencing pricing models and technological advancements.