Feature entitlements are essential for managing complex access control in AI, SaaS, and tech companies, acting as a bridge between pricing strategies and product access. With a significant portion of these companies employing usage-based or hybrid pricing models, entitlements ensure customers only access features they've paid for, facilitating seamless upgrades and accurate billing. The text emphasizes the importance of integrating entitlement systems with billing infrastructure to prevent revenue leakage and enhance customer satisfaction, particularly as hybrid and usage-based models demonstrate faster growth and higher revenue retention. Companies like Lago offer open-source billing solutions with built-in entitlement capabilities, providing flexibility, transparency, and scalability for businesses with sophisticated monetization needs. By adopting robust entitlement architectures, companies can optimize feature access, improve revenue predictability, and support dynamic pricing strategies, positioning themselves for scalable growth and profitability.