
Multi-carrier shipping API for platforms, 3PLs and brands
ShipEngine delivers a developer-centric shipping API with label generation, tracking, and address validation. It supports major carriers but lacks EasyPost’s built-in Luma AI and extensive white-label options. Technical teams already using ShipEngine may stay for its clean API, while those seeking AI insights and deeper carrier discounts often migrate toward EasyPost.
Free

Make every post-purchase moment count with branded tracking and returns
Free USPS & UPS shipping software with no monthly fees or markups
Multi-carrier shipping labels, API and store integrations for e-commerce businesses