Ticket systems feature comparison

We compared the most known helpdesk ticket software apps and here's the feature comparison table:

	Zendesk	Jitbit	Freshdesk	Desk.com
SaaS	yes	yes	yes	yes
On-premise version avail.	no	yes	no	no
File-attachments	yes	yes	yes	yes
Knowledge-base	yes	yes	yes	yes
Email integration	yes	yes	yes	yes
Twitter integration	yes	no	yes	yes
Google-drive integration	no	yes	no	no
Active Directory integration	yes	yes	no	no
Automation rules ("if this do that")	yes	yes	yes	yes
Canned responses	yes	yes	yes	yes
Change management	crippled	no	no	no
Asset management	via partner software	yes (basic)	no	no