Link	Google Docs	Microsoft Word	Apple's Pages
Cross platform?	Sì	Sì	- With iWork for iCloud, or just simply by using the website.
Is it free?	Sì	No	Sì
Can you work offline?	Sì	Sì	Sì
How many people can you invite to the document?	Up to 100	Up to 500	Up to 100
Does it have an app?	Sì	Sì	Sì