Google is prepping a new shipping service aimed at taking on Amazon Prime. Known as Google Shopping Express, the service will allegedly undercut Prime by $10 to $15 while offering same-day delivery from local retail stores. It's unclear when and if Express will launch publicly, but Google employees may already be testing the service out, TechCrunch said.

"We're hearing that the project is being run by Tom Fallows, an e-commerce product manager at Google, and is an effort to focus Google's e-commerce initiatives," TechCrunch explained. Further expanding on that, Express will apparently tie Google Wallet and Google Shopping together, which are currently lacking real purpose.

It's unclear which brick-and-mortar stores might participate, but TechCrunch speculates partners will include nationwide retailers such as Target, Walmart, Walgreens and Safeway. Google previously acquired BufferBox (for delivery lockers) and Channel Intelligence (for coordination), adding more credence to the online-to-offline service. Amazon has its own delivery locker service, too, and also offers other benefits with Prime including access to its streaming movie library, instant access to new books and more.

A service cheaper than Prime is an exciting idea, but as of now we have no way of knowing if this will actually come to fruition.