| ExtensisHR | Extensis II Inc. | 900 Route 9 North, 3rd Floor | extensishr.com |
| EmPower HR | EmPower HR | 234 W Florida St, Suite 310 | empowerhr.com |
| EmployShare | EmployShare | 5001 N Wheeling Ave, Suite B | employshare.com |
| Employprize (formerly Crown Employer Services) | Employprize (formerly Crown Employer Services) | — | employprize.com |
| Employers Options | Employers Options (Hawaii) | 615 Piikoi St, Suite 201 | employersoptions.com |
| Clear Employer Services | Clear Employer Services | 2080 Cabot Blvd W, Suite 202 | clearemployerservices.com |
| Avitus Group | Avitus Group | 175 N 27th St, Suite 800 | avitusgroup.com |
| APEO | APEO, LLC | 281 Sanders Creek Parkway | |
| ASC PEO, LLC | ASC PEO, LLC | 569 Brookwood Village, Suite 901 | |
| Anchor QEA, Inc. | Anchor QEA, Inc. | 1201 Third Ave Suite 2600 | |
| Anthros | Anthros, Inc. | 400 W. Morse Blvd., Suite 203 | |
| Applied Business Solutions, Inc. | Applied Business Solutions, Inc. | 3020 Hartley Rd, Ste 300 | |
| Applied Power Solutions, LLC | Applied Power Solutions, LLC | 449 S Virginia St 4th Fl | |
| Ashley Management Corporation | Ashley Management Corporation | 16 West Main St. 700 Powers Bldg | |
| Ataraxis Nevada, Inc. | Ataraxis Nevada, Inc. | 600 N Curtis Rd Suite 101 | |
| Axios, LLC | Axios, LLC | 528 4th St NW | |
| BCN Resources Inc. | BCN Resources Inc. | 3650 W. Liberty | |
| BSL Professionals LLC | BSL Professionals LLC | 201 Jones Rd., Suite 300 | |
| Barrett Business Services, Inc. | Barrett Business Services, Inc. | 8100 NE Parkway Drive Suite 200 | |
| Basic Pay II, LLC | Basic Pay II, LLC | 231 W 29th St., Room 503 | |
| Bearing Tree, Incorporated | Bearing Tree, Incorporated | 300 S Riverside Plaza, Suite 1625 | |
| Black & White Leasing, LLC | Black & White Leasing, LLC | 3120 Township Road 155 | |
| Builders Exchange of Rochester, Inc. | Builders Exchange of Rochester, Inc. | 180 Linden Oaks, Suite 100 | |
| CEOHR | CEOHR, Inc. | 4211 W. Boy Scout Blvd Suite 500 | |
| CTMJ Inc. | CTMJ Inc. | 3014 US HWY 301 N., Suite 1000 | |
