Hey there, 
    We are in the market to make a multivendor marketplace for say clothing (We might diversify later). 

But rather confused because we heard great things about magneto 2 or shopify to make an easy website and mobile app for e commerce platform. But we also want a white label app to our business. Where the code and the entire money is under our company. 

So we are looking for app and website developing companies. So pretty typical idea, vendors upload products and decide on their shipping methods (store collection would be the preferred shipping), so we need some geolocation, profiles, (no need for social login) we also want the app to be able to sustain many concurrent users as we are big business and are estimating high traffic. We would want the app to look and feel great. 

We don't know if we have native two separate apps for iOS and android or two combined. So you could just tell us the price increase maybe then we can make our mind hahaha. 

We are so sorry for the unconvince but we prefer email rather than calls so can you not call to discuss. 

So, how long do you take to finish such peoject and how much would you charge? 

With regards
Khan