Sunnyvale, Calif. -- Critical Path, a Sunnyvale-based developer of messaging and messaging security tools, said on Thursday it has acquired San Mateo-based Laszlo Systems, creator of a web-based communications platform integrating email, voice and messaging with social media. Financial terms of the deal were not disclosed. Critical Path said the acquisition of Lazlo's Webtop application will allow it to deliver a unified application platform integrating a range of messaging, IM, voice, video, media and social services. "Beyond technology, Laszlo also brings great talent and a strong presence in the North American and Chinese markets, and we are excited to be able to reach more customers in those regions," said CEO Mark Palomba. George Shahid, the former CEO of Lazlo, has become the COO of Critical Path.