Differences between Process Builder and other tools

Salesforce offers various tools to automate business processes, for example, Visual Workflow, Workflow Rule, and Process Builder. So, it is necessary to understand the difference between these tools and when to use which. The following table describes the difference between these tools:

	Workflow	Flow	Process Builder
Visual designer	Not available	Available	Available
Starts when	A record is created or edited	The user clicks on a custom button/link A process starts Apex is called Inline Visualforce page The user accesses a custom tab	A record is created or edited
Supports time-based actions?	Yes	Yes	Yes
Call Apex code?	No	Yes	Yes
Create records	Only task	Yes	Yes
Invoke processes	No	No	Yes
Update records?	Yes, but only fields from the same record or parent (in case of Master-detail relationship...