"This study creates a taxonomy of startup assistance organizations and provides a working definition of an innovation accelerator that departs from those found in the existing literature. Previous definitions have highlighted accelerators' services and focus on software applications as key characteristics of the definition. The proposed taxonomy distinguishes accelerators from other startup assistance organizations based on the organization's value proposition and business model, both of which are influenced significantly by the accelerator's technology focus and the founder's motivation for starting. Through this taxonomy, three categories of startup assistance organizations are identified: (1) incubators and venture development organizations, (2) proof-of-concept centers, and (3) accelerators. Accelerators are further subdivided into social accelerators, university accelerators, corporate accelerators, and innovation accelerators."