- NIPA—National IPA
- PAS—Physicians’ Alliance of America
- TIPS/TAPS Cooperative Purchasing Systems
- Provista
- National Joint Powers Alliance
- H-GAC, Houston Galveston Area Council, Co-op
- U.S. Communities
- The Cooperative Purchasing Network
- E&I Cooperative
- Buy Board / TASB
- UT Alliance
- Term Contracts
- TXMAS Contracts