Nightscout is a free and open-source project, and associated social movement, that enables accessing and working with continuous glucose monitor (CGM) data.

[3] The Nightscout Project traces its origin to February 2013, when the parents of a 4-year-old boy newly diagnosed with type 1 diabetes began using a continuous glucose monitoring system.

[citation needed] Costik's uploader was expanded by Lane Desborough and Ross Naylor,[4] to develop "Nightscout": adding a blood glucose chart display that could be viewed throughout a home.

Because this software was, in effect, an unlicensed medical device, the community delayed releasing the code as open source to explore and address legal concerns.

In addition, the related 501(c)(3) organization Nightscout Foundation was formed in 2014 to encourage and support open source technology projects for individuals with type 1 diabetes.

[10] The #WeAreNotWaiting hashtag used by the group was initially coined by Lane Desborough[11] and Howard Look, in reference to a growing call for a "diabetes data exchange" hosted by Tidepool and DiabetesMine in November 2013.

The United States Food and Drug Administration (FDA) expressed concern that a singular entity was needed to review code, monitor safety, and respond to issues.

T1Pal service adds to the Nightscout software patent-pending sharing features and standard email and phone support capabilities needed to enable access the largest possible community of users.

[citation needed] In 2017, the Spanish company Instead Technologies launched a continuous reading system named GlucoAngel for the FreeStyle Libre flash glucose monitor.