Some 80 percent of respondents cited 'pricing' as the top reason for adopting open source software over commercial software.
Around 57 percent selected 'access to source code', and 41 percent chose 'community code review' as the primary reasons for open source preference.
"Businesses must control costs for IT," said Dean Drako, president and chief executive at Barracuda Networks.
"The fact that open source software is now viewed on a par with commercial software shows the gains it has made in becoming a viable element of business security solutions.
"For companies such as Barracuda Networks that use open source software as part of their solutions, it is vital to be guided by customer feedback."
The survey also found that the top advantages for deploying commercial software over open source are 'professional services' (65 percent of respondents), 'ease of adoption' (47 percent) and 'automated updates' (47 percent).