Editions of Salesforce

DetailsGroupProfessionalEnterprise

Indicative Pricing

(see Pricing)

AU$35/user/monthAU$95/user/monthAU$180/user/month
Think of it as

A Contact Management app with a great mobile app

Lead management

A shared excel spreadsheet in the cloud,

with basic tracking of sales

A full enterprise level platform for all business areas

except accounting, warehousing / distribution, specific verticals

Integrations available(error) Web to Lead only(green star) API available at a cost(tick) Almost anything you can imagine
Apps available(star) very limited

(green star) Limited

even some apps that use the API may not be available if the API is paid for

(tick)(tick) (but many at a high cost - see Appexchange Apps).

Note, based on Sales Cloud - see also Service Cloud and Marketing Cloud for other options