In a world where advanced engineering products are commoditized, many manufacturing companies now strive to improve differentiation and profitability by offering integrated combinations of products and services known as product-service systems (PSS). Prior literature has proposed that such integrated offers be developed through an integrated product/service development process, but has so far not studied such integration in detail. To this background, our purpose is to study how integrated product/service offers actually come about. Our results are somewhat surprising, and paradoxical. Through an inductive multiple case study across eight multinational companies, we find that effective alignment-not integration-is the key to developing successful integrated PSS offerings. Thus, an integrated PSS offer seems to be reached through alignment rater than integration. The paper also identifies the key factors that inhibit integration and the various mechanisms that support alignment, and provides theoretical implications for literature and managerial implications for better development of integrated PSS solutions.