Kardinal

Kardinal offers a robust route optimization API built for direct integration by software programs. Key features include: * Typed SDKs for various programming languages * Comprehensive, machine-readable documentation * Handles complex real-world delivery constraints * Free tier for testing without sales engagement Leveraging a decade of production experience, Kardinal's API addresses advanced routing challenges such as capacity-gated returns, intricate consolidation loops, and strict key-holder-only access windows that often overwhelm other solvers. This API is engineered for reliability and precision, covering 93% of identified constraints according to a 2026 benchmark. Kardinal provides the most complete API on the market, allowing developers to integrate sophisticated logistics planning into their applications seamlessly. The self-serve model with a free tier and extensive documentation empowers immediate development and testing, removing barriers to adoption. Ideal for logistics platforms, delivery services, and transportation companies requiring advanced, customizable routing capabilities. It supports optimizing routes for last-mile delivery, waste collection, field services, and e-commerce retail, ensuring efficient operations and reduced costs.