Onboarding.greenhouse.io is not a public website. It is a portal used by various companies to manage their employee intake processes. Because it is a functional subdomain aimed only at a specific user group, it lacks the contact pages, team bios, and legal disclosures you might expect from a consumer-facing site.
When you see a login page for this platform, your best indicator of legitimacy is the context of your arrival. If a company you have already signed a contract with sent you the link to complete your paperwork, this is the standard way they handle that process. These systems are intended to hold sensitive personal data, so they prioritize backend security headers and, in this case, a fast and reliable AWS-backed infrastructure over user-friendly documentation.
If you are worried about whether onboarding.greenhouse.io is a scam, check the email address or the recruiter who sent the link. Since this is an enterprise software product used by thousands of companies, the domain itself is perfectly legitimate. However, always confirm the sender's identity through official channels before entering your personal information anywhere online.