Mountain Software has been supplying software products since the mid 1970's when a Partnership was formed by six individuals with a range of expertise in the computer industry. The team worked on an array of projects and in 1978 won their first legal client following an IT show. With IT being an emerging science in the legal market place, there were few packages available for small practices to differentiate between the Client Account and General Office funds. For this first client, the software that was produced created that differentiation, thus sowing the seeds of the early PMS (Practice Management System).

Building on this, Mountain Software developed its accounting package, time recording systems and case management modules. As the market requirements changed, modules were added, with 14 now in existence.

Mountain Software still has that very first client as a loyal user who plays an active role in its continuing development by being Chairman of the User Group.

As the company grew, it established itself in the supply of hardware and supporting services. Mountain Software is now able to offer full IT services, from networks, cabling, internet & web services, hardware - PCs, servers, telephony, as well as software. To support its clients, Mountain Software offers comprehensive training services, helpdesks as well as consultancy to ensure that each client understands what is available to him and how best to set up and maintain his IT infrastructure.

In 2000, Mountain Software entered the Coroners' market and now has over 92% of the market in England and Wales.

In 2002, it entered the Barristers' market with two significant acquisitions and now has over 95% of the market in England and Wales.

In 2004, it acquired G.B. Systems giving it a 25% share of the Solicitors' market in Scotland. This is in addition to its 500 existing clients.