Deciding between building in-house or buying third-party solutions for product integrations is a complex decision that impacts scalability, team focus, and customer experience. Building in-house offers complete control and customization, beneficial if integrations are core to business differentiation or if the team has significant expertise. However, it involves hidden costs, potential delays, and resource drains. Buying third-party solutions can accelerate time to market and reduce technical burdens but may lead to vendor lock-in and limited customization. An emerging alternative is the concept of product integrations infrastructure, exemplified by platforms like Nango, which combines pre-built templates with customization capabilities, offering a balanced solution that ensures speed, scalability, and control. Ultimately, the decision should align with the team’s capacity, company goals, and broader product roadmap.