Plusnet plc is a British internet service provider (ISP) providing broadband and landline services. The company was founded in 1997 in Sheffield, and became a public limited company (plc) in July 2004 when it was floated on the Alternative Investment Market. On 30 January 2007, Plusnet was acquired by BT Group, but it continued to operate as a separate business. By December 2013, it had over 750,000 customers across the UK.
In 2018, Plusnet was brought into BT Group's BT Consumer division, the CEO of which is Claire Gillies.
Plusnet Mobile operated as a mobile virtual network operator using the network of EE until it was closed in 2024.