The firm, which offers a bespoke compliance and business support service, now has over 350 financial advisory firms on its books.
When acquired by the SimplyBiz Group in 2007 the Glasgow-based company's clients stood at 165 and have now more than doubled.
Janice Laing, Compliance First business director, said: "The fact that we have doubled our number of clients, especially in the sometimes challenging post-RDR world, illustrates how strong our offering and service levels are and we are very proud of how we have developed in the last six years.
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"Since becoming part of the group, not only have we continued to provide the same bespoke, personal service with an exceptional level of expertise and knowledge, but clients now have the additional benefits available as part of a larger organisation.
"Thanks to the size and strength of the SimplyBiz Group, we have been able to offer our clients access to essential tools and systems at substantially discounted rates, as well as benefits from other divisions of the group such as Verbatim, SimplyBiz Mortgages and the New Model Business Academy along with innovations like our end-to-end post-RDR proposition, Vision."
Neil Stevens, joint managing director of the SimplyBiz Group, added: "Prior to acquiring the business, we had long been impressed with Compliance First's robust proposition and the calibre of their staff. Doubling the number of firms using their services demonstrates how fully they have retained these excellent qualities, whilst simultaneously being able to evolve the breadth of their offering to clients due to their position within the group."