BRAVE is a Biodiversa+ funded project that tackles the complex ecological and societal challenges of invasive alien species (IAS), emphasising their dual roles as both beneficial and burdensome. Managing these species requires interdisciplinary approaches to optimise outcomes for biodiversity, the economy, and society. The project assesses Nature-based Solutions (NbS) for IAS management with active stakeholder engagement and participatory valuation methods that highlight the ecological, social, and economic benefits of NbS. Three case studies across the Nordics and the Mediterranean explore the values and conflicts related to the Pacific Oyster (Denmark, Norway, Sweden), Pacific Pink Salmon (Norway), and Blue Crab (Italy, Portugal). BRAVE examines the socio-ecological impacts of harvests, including recreational and volunteer efforts, evaluating their effectiveness for conservation. By highlighting the clash between economic opportunities and conservation, we aim to provide a framework for optimal policy that integrates ecological, economic, and societal concerns. Through economic tools, we assess trade-offs, user values, and design incentive mechanisms to improve biodiversity management while safeguarding ecological integrity. BRAVE brings a social science perspective to IAS management, a field traditionally dominated by natural sciences. Engaging stakeholders—from fisheries and conservation managers to citizens and entrepreneurs—BRAVE offers a framework that uncovers trade-offs and solutions, promoting conservation through socioecological synergies. The outcomes will inform policies and management strategies designed to address current challenges and align with diverse stakeholder values, fostering more effective practices.