I'm been building towards an interoperable marketplace[0] and realized I needed to launch open-source alternatives to Shopify[1], Toast[2], Instacart, etc to take on the proprietary marketplaces.

It really comes down to merit and how much value you can bring to the actual sellers in these marketplaces with the software. If enough sellers switch, marketplaces will follow.

0. https://github.com/openshiporg/marketplace

1. https://github.com/openshiporg/openfront

2. https://github.com/openshiporg/openfront-restaurant