Anyone know what tumblr is written in

Question

Does anyone know what tumblr is written in? I have been trying to figure it out.

Answer 1

Here's the full stack as of 2013.

"We're a LAMP based stack (Linux Apache MySQL PHP) with Scala for our many services. Other pieces of tech we use currently in production are Memcached, Varnish and Redis."

http://smcdermott.tumblr.com/post/46847264498/what-language-is-tumblr-written-in-all-php