AbsenceSoft
Stands out: The AbsenceSoft Compliance Engine tracks 200+ federal and state leave and accommodation laws and stacks concurrent leaves, and the Payroll Calculations module applies state paid leave offsets per pay period. The API is publicly documented in OpenAPI 3.1 at absencesoft.stoplight.io, with Employee, Case, Employer and Communications APIs and webhooks.
Watch out: There is no public price, and custom outbound file feeds and API build work cost extra. Payroll Calculations produces estimates and export files, not payments, so payroll still runs in your own system.
Not the right fit for
- Companies outside the US, since the engine covers US federal and state law
- Small businesses that only need PTO tracking
Sparrow
Stands out: Sparrow pairs every customer with a dedicated leave specialist and files state and carrier paperwork for the employee, which its site says cuts employee filing time from 10 to 20 hours to about 15 minutes. The personalized payroll plan and reconciliation work is unusual for a leave vendor.
Watch out: HRIS and payroll connections run by file feed rather than a published API, and pricing is only available through sales. Coverage is limited to leaves in the United States and Canada.
Not the right fit for
- Small teams that only need a PTO request and approval tool
- Employers with most staff outside the US and Canada
