Are there ready-made solutions for the marketplace platform (product aggregator)?

Question

CMS

I plan in the near future to start creating a marketplace platform for B2B and B2C for 1-3 million products. At the moment, I have already built a similar business but on a more modest scale (5 suppliers and 50,000 products), I took the CMS for an online store as a basis and finalized it for my needs, the business is successful and brings a stable profit for which I plan to "surge". I want to know if there are any ready-made solutions for marketplace platforms, in other words, commodity aggregators, so as not to reinvent the wheel, but to take the existing developments and adapt them to suit yourself.

Answer 1

I'll answer myself, Google will help me with the query "multi vendor marketplace cms"

Answer 2

https://www.sharetribe.com/
https://www.arcadier.com/