Back in 2011, Joël Franusic published a neat visualization of all Y Combinator startups' hosting decisions using his neat open source domain-profiler software. I was curious to know what had changed since then, so instead of profiling all YC startups this time, I only profiled the Winter 2012 batch as retrieved from this unofficial YC startups spreadsheet.

So below are the hosting decisions for Y Combinator's Winter 2012 startups:

Raw data:

Credits to jpf for the awesome domain profiling software.

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UPDATE: Amazon hosting may include Heroku or other services using Amazon as infrastructure. According to the certificate type column in the raw data, at least 6 domains are using Heroku.