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PaaS (platform as a service) cloud providers generally limit you to a fixed technology stack. However, OpenShift and Heroku allow third-party extensions, which can be used to support Haskell.

1 OpenShift

GHC version: 8.0.1
Author: Gideon Sireling
Home page:

The cartridge comes in several flavours, with just the network and text packages or a pre-installed framework:

Framework Cartridge QuickStart Deploy
network manifest quickstart deploy
Yesod manifest quickstart deploy
Snap manifest quickstart deploy
Happstack manifest quickstart deploy
MFlow manifest quickstart deploy
Scotty manifest quickstart deploy

2 Heroku

GHC version: 7.8.2
Author: Joe Nelson
Home page:

3 Heroku-Haste

GHC version: 7.4.1
Author: Alberto G. Corona
Home page:

Heroku buildpack for tryhplay, incorporating Haste and HPlayground. Demo at