Synapse Group, Inc. is a multichannel marketing company. Synapse is also the largest consumer magazine distributor in the United States, with access to over 700 magazine titles from major publishers, including Hearst Corporation, Condé Nast Publications, Meredith Corporation, and Time Inc. Synapse attracts subscribers for these publications by working through a number of non-traditional marketing channels, including credit card issuers, catalog companies, and airline frequent-flyer programs.

Synapse Group began in 1991 as NewSub Magazine Service LLC. Founded by Jay S. Walker (developer of Priceline.com) and Michael Loeb, the company began by marketing fixed-term magazine subscriptions through credit card companies. Over the years, NewSub expanded its marketing channels to include retailers, airlines, catalogers, and dot-com companies. In 2000, the company changed its name to Synapse Group, Inc.

In 1996, NewSub introduced its Continuous Subscription Service system, which would automatically renew subscriptions. The company applied for a patent, which was granted in 2000 to Michael Loeb and Synapse Group, Inc. for "a system for providing an open-ended subscription to commodity items normally available on a term basis includes a central agent that serves as the front-end for commodity suppliers. This central agent maintains databases containing information associated with a group of commodity items and their sales. Using these databases, the central agent produces subscription records to provide open-ended subscription services to its customers, while supporting the term-based subscriptions of the commodity suppliers."

In 2000, Time Inc. made its first equity investment in Synapse Group, starting a partnership that would ultimately culminate with the outright purchase of Synapse in 2006. In a 2000 press release from Time Warner, Jeremy Koch (who was Consumer Marketing President at the time) explained, "the marketing of consumer magazines is undergoing substantial change. Our relationship with Synapse is an important part of Time Inc.'s strategy to support the expansion of new and innovative marketing methods."

In 2016, Time Inc acquired Bizrate Insights, marking Time Inc.'s transformation towards a data-driven organization. The acquisition of Bizrate generated a consumer subscription revenue with a range of owned and operated brands along with third-party products. Consumer data cultivated through Bizrate's survey platform broadened the suite of integrated marketing services (IMS) for Time Inc. to provide to its advertising partners. Bizrate Insights and Time Inc.'s relationship were further formalized.

In 2016, Synapse Group stated celebrating its "Acquisition Anniversary" one year after obtaining Bizrate Insights and aforementioned Magazine Discount Center. Bizrate Insights were well known for its consumer ratings of products which earlier partnered with Synapse Group by offering free magazine subscriptions, letting users of "e-commerce sites" provide survey feedback of companies at the end of a purchasing process. Synapse Group previously worked with Magazine Discount Center with managing the website's subscription sales

In 2019, Synapse Group acquired Stop, Breathe & Think, a mindfulness mobile app. In May 2020, the app was re-branded as MyLife. The "mindfulness mobile app" has over a total of 17 million emotional check-ins to date. The app differentiated from its competition was its usage of emotional check-ins, multiple acts, and multi-day programs. With multiple apps for children, as well as distribution on multi-platforms.

Synapse Group is headquartered at 225 High Ridge Road in Stamford, Connecticut. The company employs over 250 people and has revenues of $400 million.