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Email subject line tester

Boost your email open rates: analyze and improve your subject lines before sending your next campaign.

Subject lines you'll want to steal

Looking for inspiration for your next email campaign? Try these high-scoring subject lines for promotional and automated emails to give your campaigns the best chance of success.

Why test your subject lines?

35%

of customers open emails based solely on the subject line. A great subject line makes or breaks whether your campaign even gets opened.

69%

of customers mark an email as spam based on the subject line. Having too many emails marked as spam affects overall deliverability and sender reputation.

59%

of customers say marketing emails influence their purchase decisions. Without an attention-grabbing subject line, a large share of such emails get lost in the inboxes.