Same-day delivery startup Dropoff Inc. has expanded its delivery area into Colorado and Arizona, continuing to move toward its goal of building a nationwide network, the company said Monday.

The Austin, Texas-based company offers business clients a delivery service with last-mile logistics features such as web and mobile ordering, flexible delivery options, transparent pricing, real-time tracking and confirmation, up-to-the-minute ETAs, delivery agent ratings, and an application programming interface (API) that allows automated data sharing, Dropoff says.

After adding delivery in Florida, Texas, and California during 2016, the company has now reached Denver and Phoenix, the company announced. Dropoff works with brands across several industries relying on last-mile, same-day delivery to get items into the hands of their customers, including Sprinkles Cupcakes Inc., Whole Foods Market, Neiman Marcus, Zazzle Inc., Airbnb Inc., JW Marriott, and CarePoint Partners.

"As we grow to become the first national same-day delivery provider for business, these are logical new markets for Dropoff," company CEO Sean Spector said in a release. "Our research shows that businesses small and large throughout these cities are looking for customer-service-focused, professional same-day delivery solutions, and we're thrilled to be here to assist in their growth."