CBS News 24/7 (formerly known as CBSN and the CBS News Streaming Network) is an American streaming video news channel operated by the CBS News and Paramount Streaming divisions of Paramount Skydance Corporation. Launched on November 6, 2014, it features blocks of live, rolling news coverage, original programs, as well as encore airings of CBS News television programs.

It is available on all streaming devices, via the CBS News website and mobile app, apps on digital media players, co-owned Paramount+ and Pluto TV, and other free ad-supported streaming television (FAST) services.

The success of CBSN prompted CBS to launch similar services for sports and entertainment news—CBS Sports HQ and ET Live—in 2018, in conjunction with CBS Sports and Entertainment Tonight respectively. In December of that year, CBS also began extending the concept to its local television stations, launching streaming local news services in the markets of the network's owned-and-operated stations.

Rumors that CBS News was preparing a 24-hour online news service were first reported by BuzzFeed in October 2013, and later confirmed by a CBS spokesperson who stated that the company was seeking "partners" for the service. Initial reports suggested that the service would consist of a linear, multi-platform streaming channel, featuring video content from other CBS News productions, along with other online-exclusive content; The New York Times likened the rumored format to an all-news radio station, combining pre-recorded video content with regular, live news updates. On May 15, 2014, CBS Corporation CEO Leslie Moonves confirmed in an interview with Bloomberg Television that the company was working on the service. Describing it as an "exciting alternative to cable news", he went on to say that "there is so much information that we get every day that doesn’t fit into a 22-minute newscast at 6:30 or CBS This Morning".

In October 2014, Capital New York reported that CBS had recently filed for trademarks on the name CBSN as a potential name for the service. It also reported that the content would take place in an informal newsroom setting, and that its interface would consist of a video player with a playlist on a sidebar, and feature social network integration. On November 5, 2014, during a Re/code conference in Dublin, CBS Interactive President Jim Lanzone announced that the service would officially launch on November 6, 2014. CBS News President David Rhodes explained that CBSN was not designed to compete directly with traditional pay-television news outlets, but to "create something that is native for connected devices", such as smartphones, tablets, and digital media players.

There was also an emphasis placed on targeting younger viewers, particularly those who are in places with little or no access to television, or those who do not subscribe to pay television at all. As opposed to CNNGo, a similarly formatted TV Everywhere service introduced by CNN prior to the launch of CBSN, CBSN would be available at no charge without requiring users to authenticate with a subscription to a pay television provider. Rhodes argued that requiring authentication would hamper the service's viewership. CBSN uses commercial breaks similar to a conventional television channel; Amazon.com and Microsoft were among the service's initial advertisers.

In September 2021, CBS announced that CBSN would be rebranded under the CBS News name later in the year; the usage of a single brand for both broadcast and digital news content followed a reorganization that placed all of CBS's news efforts, including at the CBS-owned stations, under the purview of the CBS News division as CBS News and Stations.

The new branding premiered on January 24, 2022. At this time, the service moved to a new set at Studio 57 of the CBS Broadcast Center, which had been vacated by the replacement of CBS This Morning with the Times Square-based CBS Mornings. It was also accompanied by a slate of new original programming, some of which acting as spin-offs or revivals of segments from other CBS News programs. They include the documentary franchise CBS Reports, The Dish (based on the segment from CBS Saturday Morning), Eye on America, Here Comes the Sun (which features segments and unaired material from CBS News Sunday Morning), On The Road with Steve Hartman, and the interview series Person-to-Person with Norah O'Donnell. While the service was primarily branded under the CBS News name, the service was officially referred to by CBS as the "CBS News Streaming Network".