The firm received the award at a ceremony in The Edinburgh International Conference Centre hosted by comedian Michael McIntyre and said to have been attended by more than 1900 guests.
The event included a question and answer session with Richard Branson, whose Virgin Money firm sponsored the event.
Stuart McLean, CEO of Zonal, said the award is “a huge step forward for us and what we’ve been working towards for the past 35 years”.
“At Zonal we take our customers’ business very seriously and strive to go above and beyond to ensure their success,” said McLean.
“We’re incredibly proud of the way Zonal has developed and, while consistently developing new technology to help our customers, we’re excited about what the future holds for us.”