Moneywise's parent company Interactive Investor has come top in a review of fund supermarkets.
The broker beat 22 other firms for the top spot in Which?'s review of the market.
The company was judged on various aspects of its business, including set-up and ongoing charges as well as the range of products on offer and the quality of support services, with Which? particularly impressed by Interactive Investor's "investment data and slick analytical tools".
"Which? is a highly respected consumer champion and we are delighted it has recognised the work we have done both on pricing as well as quality and clarity of our content and tools," says John Blowers, head of long-term investing at Interactive Investor.
While many investors focus on performance, it is also important to look at charges as these can eat into any profits made. Always check what the charges are like and don't be fooled into thinking a per cent or two won't make a big difference.