Eighty-five percent of companies are already using open-source software, with most of the remaining 15 percent expecting to do so within the next year, according to analysts at Gartner.

However, only 31 percent of companies surveyed by the analyst house had formal policies for evaluating and procuring open-source software (OSS). Gartner conducted its survey of 274 end-user organizations across the Asia/Pacific, Europe and North American markets in May and June, and announced the results on Monday.

Respondents to the survey consistently pointed to cost as a prime motivator for their adoption of open source, with some also suggesting OSS provided some protection against single-vendor lock-in. Other reasons for adoption included fast time to market and the avoidance of complex procurement rules and procedures, Gartner said.

However, according to Gartner, a lack of formal policies could open companies up to intellectual-property violations. The analyst house's survey put governance issues at the top of the list for barriers to OSS adoption.

"Just because something is free doesn't mean that it has no cost," said Gartner research director Laurie Wurster in a statement. "Companies must have a policy for procuring OSS, deciding which applications will be supported by OSS, and identifying the intellectual property risk or supportability risk associated with using OSS. Once a policy is in place, then there must be a governance process to enforce it."