Rev is a financial services company that provides a variety of payment processing and financial management solutions for businesses. The company's products include online payment processing, invoicing, and accounting software. Rev was founded in 2010 by Jason Chicola and Josh Stomel and is headquartered in San Francisco, California. The company serves a wide range of industries, including healthcare, education, and e-commerce. Rev has raised over $300 million in funding and has been recognized as one of the fastest-growing companies in the United States.