a16z has funded 19 consumer companies in the Alexa Top 25,000: Pinterest, Twitter, Foursquare, Zulily, Fab, Airbnb, Rap Genius, 8 Tracks, Viki, Listia, Udacity, IFTTT, Clipboard, Shoedazzle, Quirky, Skout, Jawbone, Leap Motion, and App.net.

a16z has 5 enterprise companies in the Alexa Top 25,000: GitHub, Box, Asana, Mixpanel, and Stripe.

Danielle's full spreadsheet is in her blog post:

http://www.daniellemorrill.com/2013/04/indexing-the-andreessen-horowitz-portfolio-companies/

Clipboard being Alexa Top 25,000 did not mean it was a sustainable business.

It ended up having to sell to Salesforce.com in May 2013, which immediately shut the service down:

http://venturebeat.com/2013/05/09/salesforce-clipboard-acquisition/

Danielle also did this analysis for the YCombinator companies:

http://www.daniellemorrill.com/2013/03/the-y-combinator-index/

And for the 500 Startups companies:

http://www.daniellemorrill.com/2013/03/the-500-startups-index/

YCombinator has 27 companies in the Alexa Top 25,000. Its biggest hits are Scribd, Dropbox, 9GAG, Weebly, Disqus, Justin TV, Airbnb, RapGenius, Codecademy, Songbird, Listia, and imgfave.

500 Startups has 22 companies in the Alexa Top 25,000. Its biggest hits are 9GAG, Iconfinder, Chirpme, Visually, ColourLovers, Udemy, Viki, SendGrid, Wildfire Interactive, Moonfruit, Skimlinks, and Twilio.

Removing Clipboard and Wildfire (which sold) and squashing duplicates (such as 9GAG), there are fewer than 70 of the top 25,000 Alexa websites that have been funded by a16z, YCombinator, and 500.

I wonder if that means anything.