The deal was originally announced in July, with RVU saying it wanted to disrupt the mortgage industry through greater digitisation.
Manchester-based Mojo employs 60 staff and delivers personalised mortgage recommendations using a hybrid approach, which utilises both smart tech and human input to compare products.
RVU owns a range of digital price comparison and switching services which operate across a range of utility and financial services products, including mortgages.
RVU chief executive Tariq Syed says: “Our combined scale alongside the expertise Mojo brings will allow us to have a hugely positive impact on this market.”
He said RVU had helped “revolutionise” the process of buying car insurance and switching energy. “[We are] now moving our attention to mortgages — a market left largely undisrupted.”
The price RVU is paying for Mojo has not been disclosed.