c2c is an English train operating company owned by Trenitalia that operates the Essex Thameside railway franchise. It manages 25 stations and its trains call at 28. c2c provides commuter services from its London terminus Fenchurch Street and from Liverpool Street to east London and parts of Essex along the London, Tilbury and Southend lines.

The company began operating as LTS Rail in May 1996 under the ownership of Prism Rail, which had been awarded the London, Tilbury & Southend railway franchise as part of the privatisation of British Rail. LTS Rail rebranded as c2c in May 2000 and Prism Rail was bought by National Express in July that year. National Express sold c2c to the Italian operator Trenitalia in February 2017.

c2c ticket machines in the Oyster PAYG area have been upgraded so they can read Oyster cards. On 23 September 2019 it was also announced that c2c had invested more than £10 million into a new self-service ticketing system with a user-friendly self-service interface developed with Voodoo Park. The interface is completely web-based and can be remotely repaired