This chapter explores the application of the Objectives and Key Results (OKR) framework within startups across various stages of their development. The author emphasizes the adaptability of OKRs in managing the complexities of a dynamic entrepreneurial environment. The chapter begins by outlining the theoretical foundations, focusing on the startup lifecycle, the Stacey Matrix, and the OKR framework itself. Through a stage-wise analysis—early, growth, and later stages—the chapter illustrates how OKRs can address both internal and external challenges. In the early stage, OKRs are proposed as a tool for tracking consumer behavior to validate the product—market fit. As startups transition to the growth stage, OKRs become essential for aligning teams and managing the increased complexity associated with scaling. In the later stage, OKRs help maintain strategic alignment and foster a culture of transparency and self-determination, both of which are crucial for continued innovation and growth. The chapter concludes that while OKRs are particularly effective in complex, uncertain environments, their successful implementation requires a tailored approach that considers the unique challenges and culture of each startup.