AT&T is enhancing its enterprise security arsenal with the acquisition of San Mateo, California-based AlienVault. The company said that AlienVault’s threat detection platform will be a key part the security portfolio that it sells to small- and medium-sized businesses. AT&T also plans to incorporate AlienVault’s security platform into its intelligent edge network.

Terms of the deal were not disclosed, but AT&T said it plans to close on acquisition in the third quarter.

AlienVault makes a security management platform that the company says can detect threats, respond to security breaches, and ensure compliance management across the cloud — both on premises and in hybrid environments.

AlienVault also is responsible for creating the Open Threat Exchange, an open community with more than 80,000 participants in 140 countries. These researchers and security experts collaborate with each other and deliver community-generated threat data that helps companies keep on top of the latest security threats. AT&T has said that it plans to continue to invest in the Open Threat Exchange once the acquisition closes.

AlienVault was founded in 2007 and has raised about $118 million in funding, according to Crunchbase. Investors include Intel Capital, Kleiner Perkins Caufield & Byers, and GGV Capital.

Interestingly, AlienVault decided to be acquired at a time when many security startups are either launching IPOs or raking up millions in funding. Zscaler launched an IPO in March and raised $192 million. The company now has a market cap of $4.77 billion. In May Carbon Black raised $152 million in its IPO. And Tenable Network Security filed documents with the U.S. Security and Exchange Commission last week proposing to launch an initial public offering. The company has said it plans to raise about $100 million but that amount is subject to revision.

Meanwhile in about a two-week period security startups like ThetaRay raised $30 million bringing its total funding to $60.5 million. Preempt raised $17.5 million bringing its total funding to $27.5 million. Jask raised $25 million bringing its total to $39 million. And Balbix raised $20 million bringing its total to $28.6 million.