When AmazonSupply became Amazon Business in April 2015, much more than a rebranding occurred.

But Amazon Business copied the very successful marketplace approach of the regular Amazon site and welcomed more than 30,000 third-party vendors to offer their goods on the website.

Amazon is now challenging major online business suppliers in office products Staples and industrial goods Grainger .

It is currently adding about 100,000 new accounts per quarter.

Prentis Wilson, vice president of Amazon Business, stated earlier this year that the marketplace enjoys a 20 percent month-over-month sales growth rate.

Amazon Business now offers quantity discounts on more than five million items.

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