For the second year running, social media measurement firm Sociagility has ranked 25 of the top PR agency networks and their social media performance.

Using its PRINT methodology,  Sociagility created the 'Global PR Network Scorecard', which ranks agencies based on their social media effectiveness, power and engagement. The accompanying microsite allows visitors to drill into performance scored by social brand attribute and by individual social network. Each firm can also be compared head-to-head with its competitors.

Some of the results include:

– Edelman was ranked overall leader for the second year running, with Ogilvy, Euro RSCG and Ketchum runners up.

– The bottom five social performers are KREAB Gavin Anderson, Ruder Finn, Chandler Chicco, FTI Consulting and Brunswick.

– Ketchum was the most engaging on Facebook, Ogilvy the most effective user of Twitter, and Grayling the best performer on YouTube.