There are lots of libraries for building and consuming web services or using messaging products, which is the same as how any heterogeneous environment is integ

There are lots of libraries for building and consuming web services or using messaging products, which is the same as how any heterogeneous environment is integrated. Big companies integrate .NET, Python and Java like this all the time. There ARE also tools and libraries [1] for generating all the JNI code necessary to call directly into JVM libraries but I don't think it has seen much adoption. I'm not really arguing that Haskell is suitable for enterprise applications - it is not. For greenfield SAAS product companies though I think its as viable as F#. [1] http://hackage.haskell.org/package/java-bridge http://hackage.haskell.org/package/java-bridge