REF (formerly Renaissance Executive Forums)
Global peer advisory boards for business leaders; forum groups of 12–15 meet monthly, guided by a Forum Leader.

Best fit: CEOs & senior business leaders
Price/dues: guessing on par with YPO/Vistage
Region/country: Global (20+ countries)
Type: CEO Forum, Facilitated, in-person, 12-15 members
Size: 3,000+ members across ~20 countries
Year founded: mid-1990s
Notes: Formerly Renaissance Executive Forums; one of the original competitors of Vistage & YPO
