MarketplaceKit - MarketplaceKit is a platform for building different types of online marketplaces.
Sharetribe - Build your online marketplace business. You don't need a developer.
Cocorico - Cocorico is a state-of-the art Open Source solution to create an Airbnb or Blablacar for anything.
Retaxis - Look no further if you are planning to start an online store or a multivendor marketplace which allows you to sell worldwide.
Hatch.li - Create your marketplace business in 48 hours without code and accompanied by a Hatch expert.
Kreezalid - Marketplace building solution for small to midsize firms