10 Easy Subject Line Tester Tools to Boost Email Opens
Hubspot Sales
MARCH 28, 2018
Email Subject Line Keyword Checker by Adestra. Find out if your headline appeals to the intellectual or empathetic side of your prospect’s brain, and learn which side you want to appeal to given the goals and content of your emails. What it tests: Open rate and click rate of subject line keywords. Price: Free.
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