Back in November 2010 we used the Glass Pockets database to identify 38 of the top 100 Foundations (by endowment site) using Twitter. By “using Twitter” we mean Foundations with official Twitter accounts. This does not include Foundation staff using Twitter, and we did not look at multiple Twitter accounts per Foundation, only the primary official Twitter account for each of the 38 Foundations.
The Numbers

We looked at some basic metrics for how these Foundations were using Twitter, such as the follower/following ratio, tweeting frequency, age of account, etc... There is tremendous variability in the data, which is not surprising. The numbers suggest that some Foundations have done little more than sign up for a Twitter account while others are making regular use of the service.