Over the past decade, Agile methods have become the favored choice for projects undertaken in rapidly changing environments. The success of Agile methods in small, co-located projects has inspired companies to apply them in larger projects. Agile scaling frameworks, such as Large Scale Scrum and Scaled Agile Framework, have been invented by practitioners to scale Agile to large projects and organizations. Given the importance of Agile scaling frameworks, research on those frameworks is still limited. This paper presents our findings from an empirical survey answered by the methodologists of 15 Agile scaling frameworks. We explored (i) framework evolution, (ii) main ideas behind their design, (iii) benefits, and (iv) challenges of adopting these frameworks. The most common ideas behind designing the frameworks were improving the organization’s agility and collaboration between Agile teams. The most commonly claimed benefits included enabling frequent deliveries and enhancing employee satisfaction, motivation, and engagement. The most mentioned challenges were using frameworks as cooking recipes instead of focusing on changing people’s culture and mindset.