Lack of payment processors can be troublesome at times, especially when other ecommerce platforms offer plenty of payment options. The global marketplace entitles Tictail to take a commission. However, the custom shop (which comes at a reasonable price on a yearly basis) frees you from paying anything additional to Tictail for each sale happening there.
BigCommerce is most easily compared to Shopify. Both platforms offer a similar experience when building an ecommerce platform. Like Shopify, BigCommerce offers a range of prices and packages tailored to different types of businesses. The platform is highly customizable if you are comfortable with some light coding. It is also possible to use themes and templates to build your website, but some of these will come at an additional cost.