Amazon (AMZN) said Thursday it is adding a Prime delivery option to its Multichannel Fulfillment service at no additional cost and launched a preferred pricing program that can reduce fulfillment fees by up to 25%.

The new Multichannel Fulfillment option allows merchants to offer fast, free Prime delivery on their own websites without changing payment processing, order management or store policies, the company said.

The preferred pricing program combines discounts on fulfillment fees with Fulfillment by Amazon credits, allowing merchants to save 15% to 25% on fulfillment fees for the first six months, Amazon said.