In both Magento and BigCommerce, you will find a lot of in-built features and integrate new features as per your requirement. BigCommerce comes with great marketing tools, payment gateways, social commerce facilities, and much more. However, Magento is quite robust in terms of features. The in-built Magento features include catalog management, product browsing, and customer accounts.
In BigCommerce there are more than 100 add-ons, but these are paid with monthly payment. Since Magento is open source, you will have a huge variety of extensions on the Magento marketplace. They can be paid as well as free.
SEO:
After developing an e-commerce store, if the store is not easily discoverable for the customers, then you will not be able to generate sales. SEO plays a vital role to bring traffic to your store and thus generate sales.
Do you know that 93% of online purchases begin from an online search? In the ranking of best e-commerce development in terms of SEO, Magento was retaining the first position, while BigCommerce came in 4th position. In every SEO capability, Magento was better than BigCommerce.