Analysis of 12 ATS APIs Across 1.5M Job Postings Reveals Widespread Data Gaps
A developer audited 12 major applicant tracking system APIs — including Greenhouse, Lever, Ashby, and BambooHR — by reading over 1.55 million live job postings to measure which fields actually contain data. The study found that only four platforms publish compensation data, and none fills it consistently, with fill rates ranging from 26.9% to 45.7%. Remote work indicators were equally unreliable: BambooHR exposes an isRemote field that was empty across all 50,616 postings sampled, while four platforms offer no such field at all. Posting dates were absent entirely on Personio, Rippling, Pinpoint, and BambooHR, making recency-based filtering impossible on those systems. The analysis also flagged platform-specific quirks such as SmartRecruiters silently capping results at 100 rows and Recruitee returning zero-value salary objects when employers leave the field blank.
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