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
HR Acuity
Stands out: The vendor positions itself as purpose-built ER software with AI writing assistance, guided investigation workflows, and benchmarking, used by names such as Workday, Bloomberg, and Lyft.
Watch out: hracuity.com is a demo and contact-sales motion. You will not see a starter seat price, and this is built for 500-plus employee ER teams more than a 40-person HR shop.
Not the right fit for
- Small employers that only needed a spreadsheet of write-ups
- Compliance teams that actually need a NAVEX-style ethics hotline and TPRM suite
