15 ATS APIs to Integrate With in 2026: Greenhouse, Lever, Workable

Applicant Tracking Systems (ATS) are central to modern hiring processes, managing various aspects like candidate pipelines and interview scheduling, making them essential for SaaS platforms in recruiting tools and HR analytics. Integrating with ATS APIs is crucial but challenging due to differing API structures, authentication systems, and data models across platforms like Greenhouse, Lever, and Workable. Unified ATS APIs offer a solution by standardizing recruiting data models and authentication, significantly reducing the complexity of supporting multiple ATS providers. These unified APIs allow developers to integrate once and access recruiting data across numerous platforms, promoting efficiency and reducing maintenance burdens. As the recruiting ecosystem grows, unified APIs are becoming vital for SaaS companies aiming to streamline their integrations and maintain a competitive edge in the market.