Greenhouse, Lever, Workable and LinkedIn Recruiter rent the pipeline, the scorecards, and often the job-board distribution. There is no open-source ATS we will put a client on and call it Greenhouse. The applicant, the role, and the decision can still be stored in ERPNext, GPL-3.0, so the history is not stuck in the subscription if the company later leaves it.
What do you give up?
One-click posting to a dozen boards, and a marketplace of assessment vendors. If that distribution is why the ATS exists, keep it. Own the copy of every candidate you are legally required to retain.
Why not name a half-maintained ATS?
Because a stale project with a GPL badge is not a system a company should hire on. We would rather say the category is thin than hand over a tracker nobody will patch.
When is a custom pipeline the job?
When hiring is a process with exceptions, not a board. That is automation and a record, not a second Greenhouse. We scope that as a build.
What do we hand over?
We select the system, deploy it on infrastructure you control, connect it to the tools you keep, and write the runbook so your own team can operate it. Support after handover is optional. The rest of the map is in software you can stop renting; the engagement behind it is open-source business systems.
Name one process that still needs a person. We will tell you what a one-time build takes.
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