Top Technologies Used By YC Companies

The pie chart indicates that only 15% of companies use CSS? That's clearly the wrong way to display this data. Very few of the technologies covered are mutually exclusive.

Interesting to see which companies are savvy enough to sign up for Google's free webmaster tools: <a href="http://trends.builtwith.com/tech-usage/Y-Combinator/Google-Webmaster" rel="nofollow">http://trends.builtwith.com/tech-usage/Y-Combinator/Google-W...</a><p>The list includes Dropbox, Scribd, WePay, OMGPOP, Loopt, and Weebly, but a lot of sites are missing out on potentially useful information--only 18% of 136 sites were detected as signed up with webmaster tools.

It's nice to see builtwith on the HN homepage, thanks for submitting this page Alex. I'm reading through everyone's feedback and will make changes accordingly, thanks everyone for commenting.<p>A few notes and things I will clean up -<p>* The pie charts I admit appear misleading thanks for affirming this, for widgets and technologies they show the leading tool but for document based technologies like CSS/JS they don't look right. 15% of sites aren't using CSS, &#62; 85% are, and I suspect the rest are either dead sites or some other issue. I'll look at swapping to bar graphs which some of you have mentioned might be a good alternative<p>* PHP usage is based on server side implementation so a server might support PHP it doesn't necessarily mean the site is written in PHP<p>* The source of the list is yclist.com from about 3 months ago<p>You can lookup individual sites at <a href="http://builtwith.com" rel="nofollow">http://builtwith.com</a> such as <a href="http://builtwith.com/lanyrd.com" rel="nofollow">http://builtwith.com/lanyrd.com</a><p>Thanks again!<p>Gary

Adobe Dreamweaver is a framework now? News to me!<p>Seriously though: There is really too much noise in some of these diagrams to get much out of them. What surprised me most was nginx overtaking Apache in this sample group.

I thought it was very telling that out of the 136 companies surveyed, only 2 had a payment system. Speaks volumes about the sort of companies YC is trying to incubate/build.

"detected using at least one of the technologies we track in this group" - does this mean some technology usage could be higher but it's absent because they're not tracking it?<p>Frameworks - How the hell do they "track" some of these frameworks here because the produced html/css/js could look exactly the same coming from say flask on python and jersey/jax-rs on java?

What baffles me is how this site users themselves seem to dislike PHP a lot, yet it's the most used language of these companies... So why the hate?

The pie charts seem like an odd way of counting some of these; for example, one site could use Facebook Like, Google +1 and a Tweet button all at once, but showing them as slices in a pie chart implies to me that the options are mutually exclusive.

You missed our site, lanyrd.com (W2011) - out of interest, what was your soure for the list of YC companies?

Obviously this analysis is meaningless if the company isn't building an internet-facing web application. And even if they are it isn't that interesting, as it doesn't capture anything about the back-end. Stick a nginx caching reverse proxy and change a few HTTP headers and you've got something that looks completely different as well.

Two observations:<p>- X-FRAME-OPTIONS: IMO, more people should know about and use this.<p>- Adroll: Would be much more effective if it didn't keep showing me ads for products that I already use. I wish it had an opt-out so I'd quit seeing the same ads over and over again everywhere I go online.<p>P.S. I know others balk at the pie charts (for good reason), but for me it's irrelevant. I go straight for the numbers and the charts add a nice visual break so that it doesn't look like a wall of text. So at least they have that going for them. :-)

Its interesting to note that nginx is overtaking apache.<p>Some data is highly misinterpreted. (mod_ssl as Operating system, Dreamweaver as framework etc).

Interesting information that I'm genuinely interested in but the execution and delivery leave me scratching my head.<p>The operating system and web server graphs make no sense.<p>mod_ssl? varnish? Makes me question what was asked and who was answering.<p>I'd also contend pie charts aren't the best way to represent this information, especially in the categories where there are only a small number of responses.

Great having statistics like this, but for most of the statistics the pie chart is rubbish. It only makes sense in the case where the companies really only uses one of the technologies posible. Bar graphs would have been better.<p>EDIT: Seems like I need to refresh the comments before i post my own, archangel_one beat me to it.

I wish that they had also shown what hosting they were using. That would have been the most interesting to me.

IIS took a roughly 5% share on web servers but Windows doesn't appear on the OS breakdown at all...

A visualization of this YC data as compared to technologies used across the top million sites. <a href="http://slice-publish.s3-website-us-east-1.amazonaws.com/rnkjSHj873J/#" rel="nofollow">http://slice-publish.s3-website-us-east-1.amazonaws.com/rnkj...</a>

I find it hard to believe that 15% of these sites don't use CSS?

Its kind of surprising for me that PHP is popular among YC companies. I thought RoR/Python is more demanding than PHP but I was wrong.

Pretty interesting stuff - one thing that stood out for me was that the Google+1 was more common than the Twitter Tweet.

Stripe's suspiciously missing from this list. I think there should be at least one YC company using Stripe at least?

Only 15% of them are using advertising tools? Are YC startups averse to this type of marketing?

I'd love to see the breakdown of hosting providers -- Heroku, EC2, AppFog, Rackspace, etc.

I am the only one surprised with the Django representation?

3 using FrontPage?!

Interesting that NO ONE uses Windows.

Really nice collections

BOGUS!!!