Why magento is the best platform to make a ecommerce website. It is 100% customizable, available in both versions of magento 1 & 2, supports multiple features etc.
To make a perfect marketplace website magento software is the preferred choice. Readymade eCommerce script is very effective rather than custom development. In the above link which shows the comparison which is best & effective ways to make a eCommerce website
Source URL - http://bit.ly/2wSU2pU
Want to know how to make a multivendor website in magento, this post which gives you a complete breakdown about it.