We do creative design and development, we need a company to host and provide security/IT support for our current and past clients. Open to partnership or strict referral to you as a vendor. We need to provide options to clients beyond "GoDaddy." We don't host.
If you are looking for partners who can refer customers to you, and vice versa, you may want to look for more local partners.
If you are interested in a vendor relationship where you have a couple or three different platforms to offer your customers, then you may want to look at national hosting vendors.
If you have clients in certain segments, you may want to look at which vendors or providers out there are a better fit to that segment.