Test your email subject line in seconds
Paste your subject line, get instant feedback, and ship emails that actually get opened.

How it works
- Step 1 – Paste your subject line: Drop in any subject line from your campaign, newsletter, or automation.
- Step 2 – Get an instant breakdown: See what’s working and what might hold your open rate back (length, clarity, urgency, and more).
- Step 3 – Improve & send with confidence: Make quick tweaks and re-test until you’re happy, then plug it back into your ESP.
Email Subject Line Tester
Get instant feedback on your email subject lines with our AI-powered scoring system. Boost your open rates with data-driven insights.
Why customers love Privy
Having a Customer Success Manager has been key. They know conversion, email, and popups inside and out. Privy has saved my store during tough times — I’m a customer for life.
LippyClip
Amazing experience! Support were so helpful, and really kind, given I was responsible for the issue! So impressed at how quickly my issue was resolved, and the communication was top notch!
The Three Little Floofs
"I cannot say enough great things about Privy associate, Jessica L. She went Above and beyond to walk me through the steps of setting up the pop up, making sure the discount codes were synced with Privy, and even assisting with migrating my contacts from MailChimp to Privy. She is awesome! Privy is my favorite app!"
The Royal Bloke
"The fact that we have a dedicated CSM at Privy is amazing. In the 10 years that we were with Mailchimp, I think I spoke to a living person once. Just once."
Barrister and Mann
Privy’s customer service is unmatched. Our inquiries are always met with so much help and offers to hop on a call. We moved everything over and never looked back!
Truly Lifestyle Brand
I have been very pleased with the Privy service over the last couple of years. But I especially LOVE my CSM (customer success manager). He is so helpful and is always my cheerleader.
Urban Oreganics