Magento is considered the best open source ecommerce platform by many online stores. Magento is an ideal e-commerce platform for medium and large businesses that handle a large volume of traffic and require exceptional technical assistance, installation and configuration assistance. This platform offers various plans. For example, Magento Enterprise Edition, which is commonly used by large corporations, costs $22,000 per year. Learn more about the open source ecommerce platform. Good luck to you!