Techmarket is a WooCommerce theme and it supports all features of WooCommerce. Multi-vendor management is not a default feature of WooCommerce. However, there are WooCommerce extensions like Dokan, WC Vendors, WCFM, and WC Marketplace ( all of them offer a free version ) that allow you to extend WooCommerce into a multi-vendor platform. Techmarket supports all the three above mentioned plugins. So, yes you can build a multi-vendor website using Techmarket.Having said that if there are any issues with Dokan or WC Vendors or WC Market places apart from UI issues, we cannot help fix them. This is because while the theme is compatible with these plugins, they are essentially third-party plugins and are not covered by our support policy. However, if there is any UI issues like a broken form while using these plugins, we will help you fix it.