You can use Mathematica 10 to author and deploy through the Wolfram Cloud, as long as you have a Wolfram Cloud product subscription. For example, if you get Premier Service Plus, or purchase Mathematica Online, you can deploy from Mathematica 10 to the Cloud. Save files from M10 to Mathematica Online, deploy from Mathematica 10 and monitor/tweak from Mathematica Online. They work together.
Mathematica, Wolfram Programming Cloud, Wolfram Alpha - they are all based on the Wolfram Language. You can use the Wolfram Language through any of these products.