Wikipedia
BillMonitor is the only UK-based mobile price comparison and switching website to be accredited by Ofcom, the independent regulator and competition authority for the UK communications industries. Before they are accredited, Ofcom subjects services to an audit, which claims to check whether the information given to consumers is comprehensive and transparent.
Started in 2007, the site was developed by mathematicians and scientific advisers from Oxford University and analyses historical usage patterns to predict future usage.
Like its UK competitors, Mobile Phone Checker and moneysupermarket.com, the service recommends plans based on a user’s stated needs, in terms of minutes per month, texts, data and international use. Unlike its UK competitors, the service also offers a monthly bill-tracking facility that allows users with online billing to give the site access to their past bills.