Tripwire is to buy nCircle in a deal which could create one of the largest security and vulnerability management companies in the sector.
The deal, which is subject to the usual customary closing conditions, is expected to go through in April but the exact terms have not been released.
In 2012 the two companies' combined bookings were approximately $140 million; together they had more than 500 employees and over 7,000 customers in 96 countries.
As a result, according to Tripwire, as a combined entity the two businesses would rank among the largest security and vulnerability management companies in the sector.
This would put them in the same league as big hitters such as IBM, EMC, Symantec and McAfee.
Jim Johnson, CEO of Tripwire, said: "Tripwire and nCircle have the opportunity to be a powerful and transformational combination in the rapidly changing security market.
"Our combined solutions are uniquely positioned to align security posture with business objectives, a crucial step in making security and risk meaningful and actionable across the enterprise."
Abe Kleinfeld, CEO of nCircle, added: "The combination of Tripwire and nCircle brings together the industry's leading researchers and the broadest and deepest solutions for reducing risk."