Shopify today announced it is acquiring 6 River Systems, a startup focused on fulfillment automation for ecommerce and retail operations. The deal is valued at approximately $450 million -- 60% in cash and 40% in shares. At its Unite partner and developer conference in June, the company announced its Shopify Fulfillment Network, which uses machine learning to ensure timely deliveries and lower shipping costs. Shopify's fulfillment centers span California, Georgia, New Jersey, Nevada, Ohio, Pennsylvania, and Texas. The network, which is only available in early access, supports merchants that ship between 10 and 10,000 packages per day.