A scale-up is a company that has achieved product-market fit and entered the growth and scaling phase, typically 50-500 employees with predictable revenue growth. It is characterized by annual revenue growth rates of 20%+ year-over-year (often 40-100% for high-performers), maturing functional organization with department heads running their domains (VP Engineering, VP Sales, VP Marketing rather than founders running everything), Series B and later funding stages, and operational focus on scaling a proven model rather than discovering one. It is the structural phase between early-stage startup and mature company, with distinctly different operating dynamics from either.
The defining characteristics of scale-ups: