What are some alternatives?
When comparing Sparta and Cold Email Generator, you can also consider the following products
Close - A CRM with built-in calling, SMS, and email
Cold Email Hacks - Proven cold email templates and tactics for B2B startups
SalesWise - A gorgeous launchpad for sales people
Mailshake - Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.
Hoopla - Your public library at your fingertips.
Cold Email Analyzer by Mailshake - Real-time analysis of email subject lines and copy