Curiosity-based subject lines are powerful because they draw the reader's attention and encourage them to open and read the email.
Here are some curiosity email subject lines to help you see how it is done:
5 Secrets ways to [Objective]
[Brand Name]: Your secret discount coupons
This is not cool [First Name]
Are we meeting tonight?
What happens in Vegas…
Quick question [First Name]
[Business Name]: Your surprise inside
Unlock special discounts (24 hrs only)
Dare to take up our challenge?
Your exclusive invitation awaits
How to become a VIP for free?
Got a question for you
Mind taking a look [First Name]?
Special savings for [First Name]
Black Friday special discount inside
This offer is valid till noon only!
Don't open this [First Name]
Your secret invitation [First Name]
[Brand Name]: Our special gift
Guess what you won [First Name]?
5 Dirty truths about [Topic]
What no one tells you about [Topic]
11 Hidden secrets about [Topic]
The hidden wonders of [Topic]
We kept our promise
Are we breaking up?
Because curiosity-based subject lines stand out in the inbox, they're more memorable than the usual emails, so your brand is more likely to be remembered as a result.
Here are some more curiosity subject lines for your reference:
Sneak peek at [Product Name]
Top secret fact about [Product Name]
3 Reasons you shouldn't buy [Product Name]
Here’s why you should love competition
7 Must-know facts about [Product Name]
[Brand Name]: Claim your surprise gift
Ready, [First Name]?
7 Mysteries surrounding [Topic]
[Product Name]: Your exclusive preview
[Product Name]: One thing to never forget
[Product Name]: 3 hidden high ROI features
How to get our VIP tier for 25% less
[Brand Name]: Enter our giveaway!
[Brand Name]: Announcing something new
Get ready for an exciting surprise!
Guess what's brewing?
Ready to be amazed? Here’s [Product Name]
Eyes here: [Product Name] launching soon
The cat is out of the bag, [First Name]
Brace yourself for the surprise, [First Name]
Guess what's on its way to you
Please accept this small gift
Your surprise discount revealed
Something amazing inside, [First Name]
How about a little surprise?
Using curiosity in your subject lines will boost your open rates. It is important, however, to include a compelling offer in your copy to compel the reader to click through and make a purchase to make these opens worthwhile for you.
Let’s look at some more curiosity email subject line examples:
The Ultimate guide to [Topic]
Mastering [Topic] - A Step-by-Step approach
Our FREE guide to learning [Topic]
Our exclusive whitepaper on [Subject]
Unveiling your surprise gift inside
Discover the secret to [Desired Outcome]
[Business Name]: How to get an extra 10% off
The Secrets of [Topic] revealed!
[Product Name]: How to get 5X out of it
Announcing: The All-new [Product Name]
A behind the scenes look at [Product Name]
Guess who just bought [Product Name]
Special guest coming to our AMA this week
5 Reasons to NEVER offer discounts
[Topic]: 7 Tips to become a Pro
Your special invite: Join us for [Event Name]
Enter our online contest, [First Name]
5 FREE resources to get better at [Topic]
[Brand Name]: Your secret savings inside
Unlock your special offer [First Name]
Where to ship your free gift?
The wait is finally over [First Name]
[First Name], your special offer here
Unlocking the hidden secrets of [Topic]
[Topic]: The untold story
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