Tomorrow marks 1 month since Y Combinator Demo Day for the Winter 2013 class of startups, and since I’ve been tracking their progress for awhile now I have a pretty good sense of who has seen sustained interest, growing traffic, and increased audience through social media. The weeks after Demo Day were a strange time, in some ways anti-climactic as companies leave the YC nest but also exciting as they begin to close in on funding rounds which will be announced in the coming months.

On 3/25, 4/7, 4/15 and 4/21 we measured of several data points for each company. For this ranking we use Alexa rank (traffic) scaled to product unique visitors, Twitter followers, Facebook followers, and LinkedIn followers to assess who has been gaining the most visibility to customers and the outside world since Demo Day.

Want to analyze this data yourself? Download the raw dataset here.

Of course this is no measure of revenue, but it does give a good sense of which companies have the strongest top of funnel for gaining new leads right now. I wouldn’t be surprised if the companies at the top of this list were the most competitive deals for funding, and the most in-demand for jobs.

It will be interesting to see whether this ranking holds up one year from now.

Full disclosure: I have made an angel investment in Bitnami.