We really like that BigCommerce now supports Square. When building a new online store, retailers shouldn’t have to start out paying a monthly merchant account/payment gateway fee. They should be able to use an account with no monthly fee. Previously, the only two options were a PayPal Website Payments Standard Account or a Stripe Account. Both of those accounts may have required several business days for activation and approval. The registration and approval process with Square is very efficient. In addition, if you already have a Square account, you are ready to go with Bigcommerce. We tested it today and it works!
At Ogawa Design Agency, we really like BigCommerce Platform for setting up your online stores. It has a number of built-in integrations such as MailChimp, Google Analytics/AdWords Tracking and now Square.
Reference
Bigcommerce and Square Collaborate to Offer Merchants Everything They Need to Sell Both Online and Offline (02-25-2015)