Under 50 FTE, Rippling, BambooHR, or Gusto ($8-$40/employee/mo) is always the right answer. Greenhouse, Lever, or Ashby pays off for fast-scaling teams 50-2,000 FTE where ATS quality + reporting drive hiring velocity. Workday only makes sense above 5,000 FTE or $500M revenue where global payroll, complex compensation bands, and regulatory reporting justify the bill. Custom builds pay off for staffing firms, gig platforms, and specialty recruiters where proprietary matching, skills assessments, or vertical-specific compliance (healthcare credentialing, construction OSHA, driver CDL verification) is the moat — break-even vs Greenhouse lifetime cost is typically month 24-34 at $20M+ staffing GMV.