diff --git a/manual/src/introduction.md b/manual/src/introduction.md
index de4c73f7c..0d5503f27 100644
--- a/manual/src/introduction.md
+++ b/manual/src/introduction.md
@@ -1,5 +1,19 @@
 # Introduction
 
-Difftastic is a diff tool that understands syntax.
+Difftastic is a diff tool that understands syntax. It currently
+supports 14 languages:
+
+* Clojure
+* CSS
+* Elixir
+* Emacs Lisp
+* Go
+* Java
+* JavaScript (and JSX)
+* JSON
+* OCaml
+* Python
+* Rust
+* TypeScript (and TSX)
 
 When it works, it's *fantastic*.