Objective C and CoffeeScript on the one hand, and Kotlin on the other are clear outliers as languages being used but not talked about, and talked about but not used. But there are other surprises: Perl… in 2018…
Hopefully the results are a whole lot more useful now.
November 7, 2018
Retraction: This is of course wrong - I didn't look far enough outside the top ten, so I didn't find what I wasn't looking for - a whole new post on the way. That's numberwang.
Original post: The question 'which programming languages are used by start-ups?' gets asked from time to time, and I would have previously answered (incorrectly as it turns out nowadays) that the split is roughly equal amongst Ruby, Java and PHP, with Python maybe making up the rest.
That impression I think came from when I last looked at these numbers, and was inspired by an article in 2014 that used YCombinator funded companies as a proxy for start-ups generally. My recollection is that four years ago my answer would have been right. That's my story any way.
Using the same method now and comparing the numbers against this month's figures from the Ripley index, which ranks reddit's programming language subreddits by number of subscribers:
Apart from the system languages (C, C++, Rust), and the expensive Microsoft ecosystem (C#), the correlation with Ripley's top 10 seems strong to me, in future I think I'll also refer enquirers to Ripley.