Saleshandy is a cold email platform that helps organizations increase their email outreach operations without sacrificing quality. On Saleshandy, you can send hundreds (or thousands) of campaigns with multi-stage automated follow-up emails to your leads at once. You can use merge tags to customize your email campaigns and have automated follow-ups delivered based on the previous email's interaction (opens or clicks).
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Mailtrack.io - The best email tracking solution I've found. Free
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Yesware - Sell smarter with email tracking and more
Concur - Automated travel and expense management - your employees, travel managers and finance, too.