Learning assistant for Windows Phone takes name from Halo character
Microsoft may be working on its own virtual assistant, in the same vein as Apple's Siri and Google Now. App listings that appeared in leaked screenshots for the next Windows Phone operating system release showed one item marked as "zCortana," something that is said to be a voice-controlled assistant that can automatically learn from its user.
Google Assistant said coming by late 2012
Apparent new leaks have suggested Google is developing a very broad, multi-platform alternative to Siri. So far called Assistant, the concept TechCrunch saw would translate Google's search content into a "personalization layer" that would understand the relationships between data points. A voice-based recognition engine would, like Apple's system, focus on returning a key useful result or accomplishing a task, not just pushing a raw list of results.