A ecommerce website may have 1 to 100 orders. If it is about 1 orders then we are already doing good but when it comes for 20 or 10 orders then submiting order and shipping information to courier company then creating labels takes a lot of time and here shipping integration help us to fix this. Here are few best company for shipping: 1.ShipRocket (recommended): This does not only help you to ship your orders but it have other important features too. Pickrr shipway easyship shipstation To cover your investment on these integration, you can buld a shipping bundle plugin and sell this plugin separately that will include all the shipping company you have or integrate in future. It is not only helpful for the ecommerce business, but it is helpful for the customers and sellers too as order processing speed will be increase for upto 100x times and since things are going to be handled automatically so there human error in shipping will be decrease to 100% so your plugin will be solving a big problem in ecommerce business so whoever buy your script will buy this plugin too since shipping an item is not easy and need a lot of work.