Quartz is an online news platform in English. It is focused on international business news. Quartz is privately held and was established in New York City in 2012. It is published in the United States with global business news and has specific publications for Africa, Hong Kong, India, Japan, and the United Arab Emirates. 
Quartz targets high-earning readers, calling itself a "digitally native news outlet for business people in the new global economy". Sixty percent of its readers access the site via mobile devices.
In August 2017, Quartz's website saw about 22 million unique visitors. Approximately 700,000 people subscribe to its roster of email newsletters, which includes its flagship Daily Brief.
According to Ad Age, Quartz made around $30 million in revenue in 2016, and employed 175 people.
In 2017, revenue decreased to $27.6 million as advertising shrank. Uzabase (Japanese: ユーザベース) purchased the organization for $86 million.
According to a press release, the name Quartz was chosen for reasons related to its branding and the unusual combination of two infrequently used letters, q and z, in the title.
On September 24, 2012, Quartz launched its website, designed to deliver content primarily to mobile and tablet users. Its founding team members were from news organizations including Bloomberg, The Economist, The New York Times, and the Wall Street Journal. According to its website, Quartz's team reports in 115 countries and speaks 19 languages. The publication was initially led by Kevin Delaney, a former managing director of WSJ.com, Zach Seward, a former WSJ social media editor, and Gideon Lichfield, a global news editor from The Economist, among other editors.
Quartz's main office is located in New York. It also has correspondents and staff reporters based in Hong Kong, India, London, Los Angeles, Thailand, Washington DC, and elsewhere.
In 2014, Quartz expanded into India, launching Quartz India. In 2015, it launched the Africa-focused Quartz Africa.
In 2015, it launched Atlas, a chart-building platform.
In October 2019, co-CEO and editor in chief Kevin Delaney, stepped down from his position. Zach Seward, the company's second employee, became the company's new chief executive officer. That same month Apple removed the Quartz app from its Chinese App Store, as part of the Great Firewall, for reporting on the 2019–20 Hong Kong protests.
Revenue fell from $11.6 million in the first half of 2019 to $5 million in the first half of 2020. In November 2020, Uzabase sold Quartz to the publication's staff. In April 2022 the site was sold to G/O Media.
Quartz is structured around a collection of phenomena or what it calls "obsessions" instead of "beats", preferring news stories or reports to be either short or long rather than middle of the road or average.