What are some alternatives?
When comparing Sparta and Convoso, you can also consider the following products
Close - A CRM with built-in calling, SMS, and email
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
SalesWise - A gorgeous launchpad for sales people
PhoneBurner - PhoneBurner is a cloud-based power dialer to boost sales productivity
Hoopla - Your public library at your fingertips.
FluentStream - FluentStream Technologies is an advanced telecommunications company with a core focus on cloud-based applications.