The software specialists, which are utilised by 1,250 adviser firms and 11,000 individuals, have featured in the Investec Mid-Market 100 list of developing companies, which was published on Monday.
Among other software and technology companies Intelliflo is the seventh highest grower.
Nick Eatock, Intelliflo’s founder and executive chairman, said: “Our inclusion in this list is testament to the hard work and dedication of the Intelliflo teams across the whole business.
“Innovation in software is essential to our success but it’s also down to the excellent after sales service and customer support that our people consistently deliver.”
Intelliflo has been involved in software development for UK financial services for 10 years, holding combined assets under advice of £172bn.
In July last year HgCapital, a European private equity investor, became a majority shareholder in Intelliflo.
Ed Cottrell of Investec, said: “The UK mid-market contributes nearly £1 trillion of revenues annually and up to a quarter of private sector employment, and it is important that its contribution is understood and recognised.
“Through analysis such as the Investec Mid-Market 100, we hope to develop greater appreciation for this vital part of our economy.
“It is great to see mid-market growth coming from all four corners of the UK and across a broad range of industry sectors.
“We know from our experience of working with mid-sized businesses that they are highly committed to investing for long-term growth and we look forward to seeing these companies go from strength to strength in the future.”