SAN FRANCISCO:  Enterprise software company TIBCO hired Horn Group as its North America AOR for social media, and product and technology messaging.

TIBCO didn't issue a formal RFP for the work, but considered about a handful of unidentified agencies for the job, said TIBCO senior PR manager Tiffany Anderson.  Horn Group confirmed this account sparked a conflict of interest with its Yammer account, a job that was then subsequently picked up by Ogilvy PR.

Both TIBCO and Yammer are in the corporate communication ...