Vocus was a public relations software company based in Beltsville, Maryland, United States, serving clients worldwide from 1992 to 2014.

In addition to its web-based PR software suites, the company owns the online publicity services, PRWeb and Help a Reporter Out (HARO).

[5][6] In 1997, the company expanded its services to offer public relations software, including a product developed specifically for clients outside of the political sector, to help them manage external communications.

[1][8] The same year, Vocus was ranked number 50 on the Washington Business Journal's list of the fastest growing companies, after its revenue grew 32.5% from 2004 to 2005.

The "Demand Success" 2013 conference took place June 20 and 21, 2013 and featured keynote speakers Arianna Huffington and Elisabeth Moss (Mad Men).

The "Demand Success" 2014 conference took place June 5 and 6, 2013 and featured keynote speakers Randi Zuckerberg, Adrian Grenier and Judy Smith.

[20] In the United States, Vocus also operates offices in College Park, Maryland; Herndon and Reston, Virginia and Ferndale, Washington.