The Y Combinator Startup Index

In a former life I served as Editor of Seattle 2.0, and one of the most popular pieces of content we produced was the Seattle 2.0 Index – a monthly ranked list of all the local startups. It was a labor of love by Marcelo Calbucci and I was never a part of making it, but I always loved seeing how my favorite companies were doing and discovering new ones. I always thought it would be fun to make something similar for Silicon Valley, but it turns out there are a lot more startups here (I know, I know). To test drive the idea I’m starting with the companies from Y Combinator who haven’t exited, and are still operating.

There are plenty of flaws with rankings like this because traffic and Facebook monthly active users hardly tell the full story of any company and it compares web to mobile, social to enterprise, and on and on. What is valuable is seeing how things change over time. This is the first index, so it doesn’t have the month over month comparison. What it does reveal is that some companies you might not hear about every day in the press are doing really well.

Important: This does not include companies in the current YC batch.

Take a look, let me know what you think, who I missed, or any other feedback. You can read about the methodology at the bottom of this post. I will update this with any corrections and leave an update note.


The ranking is based on Alexa traffic rankings first, and Facebook monthly active users second. Right now it doesn’t factor in the iOS or Android rankings because the data is very limited. The MAU numbers are weighted as a percentage of the total MAU across all the companies, multiplied by ten, and subtracted from the Alexa rank. It sounds simplistic, but looking at the list it seems to make sense. I’m open to feedback on mkaing it better.


Leave a Reply

Your email address will not be published. Required fields are marked *