TelstraClear is New Zealand's second-largest telecommunications company and is a wholly owned subsidiary of Telstra Corporation (Australia), with around 400,000 customers.

The company provides residential line rental services, internet services, IT services, security services, cable TV/cable modem and mobile telephone services to 70,000 subscribers on its network in Wellington, Christchurch and Kapiti.

In 2004 TelstraClear began offering residential line HomePlan services including broadband outside those areas where it has its own network, reselling a wholesale product from Telecom New Zealand, and investing millions in LLU (Local Loop Un-bundling which entails TelstraClear Installing its own equipment into Exchanges).

TelstraClear had its beginnings in 1996 with Telstra New Zealand.

Telstra NZ slowly expanded its operations in the business market bundling Telecom New Zealand services distributed as a reseller with its own network services. It installed switches in Auckland and Wellington to manage incoming and outgoing international traffic and maintained an interconnect agreement with Telecom New Zealand and is likely to have had others with companies such as Clear Communications.