How Assessment and Background Check Vendors Integrate with ATS Platforms

Integrating assessment and background check vendors with Applicant Tracking Systems (ATS) requires a complex process involving individual partnerships, endpoint stacks, and approval processes tailored to each ATS. Platforms like Unified.to and Kombo streamline this by offering a unified API model that abstracts multiple ATS integrations into a single Package → Order → Result flow, allowing one implementation to cover all supported ATS assessment modules. Greenhouse, Workable, and Ashby each have specific requirements for assessment partners, ranging from endpoint hosting to mutual customer thresholds. Unified.to stands out by also abstracting the integration with background check providers, such as Checkr and Certn, through its Verifications API, offering a comprehensive solution for both assessment and verification processes without storing candidate data. While direct partnerships provide marketplace presence and deeper integration capabilities, a hybrid approach using both direct and unified methods is often recommended to maximize coverage and efficiency in ATS integrations.