VendorMixer Inc VendorMixer Inc. is our primary platform to harbor all our Multifamily Vendor | Supplier Members. We are excited to announce that we have surpassed 100,000 active vendors listed, each day that number is growing. It’s our goal to conveniently introduce available, qualified property management vendors to property owners, property managers, maintenance supervisors and all other property management operators. Additionally, we anticipate VendorMixer will further improve how the social interaction occurs between Vendors and property operators.