This post is part of a series on data-driven blogging which includes the Startup Index and Investor Index. I have quantified companies from 500 Startups, Y Combinator, TechStars, Andreessen Horowitz and First Round Capital and would love to hear your feedback on what I should measure next.

I hate subjective top X lists as much as the next guy, and since I’m tracking ~1,100 companies now I thought it would be fun to share the fastest growing folks of the past week. These are this week’s movers and shakers.

*calculated as the delta between the log of the original Alexa rank and log of the new rank. Updated to remove TutorialTab, founder has confirmed the company is no longer operational.

*the @Authy Twitter account followersappear to be primarily spam accounts, they went from 239 followers to 7736 followers in the past week – they say they did not buy followers so they might have been bot bombed.

And my personal favorite, because getting LinkedIn followers is pretty difficult:

And last but not least:

Other Notable Movements in the Data

On LinkedIn companies self-report which bucket company size they are in, and usually this doesn’t move much. However, Task Rabbit and Bizible both bumped up from the 2-10 employees to 11-50 employees size.