Iuliia Nesterenko

Technical Writer

50 Thank You Email Subject Lines

50 Thank You Email Subject Lines

A subscription or purchase isn’t the only occasion to thank your customers – there are many reasons you might be grateful and willing to demonstrate appreciation. A fine thank you email goes a long way towards building a connection with your customers and increasing their loyalty.

In this article, we’ll focus on how to craft an engaging email and see the best thank you email subject line examples.

Thank You Email Subject Lines For Signing Up & Welcome

Now, let’s take a look at some examples of thank you email subject lines that you might use as inspiration for your future campaigns.

  • Welcome to the Gang! (Wool and the Gang);
  • You’re on the list. Welcome to NYCgo. (NYCgo);
  • Thanks for connecting with us! (United Way Massachusetts Bay);
  • Hello there — thank you for signing up! (Vera Bradley);
  • Congrats, Your Sign-Up Was Successful! Here's a Special Gift, from Us to You (Williams Sonoma);
  • Thanks for Joining Our Flock! (Lehman's);
  • Good things to come (Rudy's Barbershop);
  • Congratulations, You're Now on The Coach Email List. (Coach);
  • Welcome to a world of adventure (KE Adventure Travel);
  • You've scored a code (Native);
  • You're on the list! (Lindy Bop);
  • You're in good company. (CBD Central);
  • Thanks for having great taste (Alex Mill).

Thank you sign

Thank You Email Subject Lines for Supporting

  • Let's Do It Again | Travel + Leisure's #1 Resort Hotel in California (North Block Hotel);
    You showed up in a big way (Patagonia);
    Because of you, we’re donating $300,000 (The North Face);
    Thanks for helping us (Revolution Tea);
    Thanks for making Litmus Live Boston awesome! (Litmus);
    Thank You for an Amazing Year (Tinker Watches);
    Thank you for this incredible year! (Readdle);
    Last Chance: A 20% Off Thank You (Bombas);
    Not A Marketing Email. (Brooklinen);
    July Newsletter: Milestones and More (Issuu);
    You’re one in a million (TransferWise);
    We think you’re 1 in 10 million. Here’s some free Trello Gold. (Trello);
    It's National Small Business Week and we're celebrating you. (GoDaddy);
    Big News and Bigger Thanks. (MindBody);
    Bundle Up (Ugmonk);
    Thanks for a super fly 2016! Our annual report + free tees (Flywheel).

Thank you for support

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Thank You Email Subject Lines for Loyal Customers

  • Fancy a treat on your birthday? (Monica Vinader);
  • Thank you for using LendingTree in 2019! (LendingTree);
  • 1 Million Photos Later (Unsplash);
  • With Gratitude (Artifact Uprising);
  • Postcards From Your Adventurous Lives (Paravel);
  • Fitbit is 10: A note from our founders (Fitbit);
  • A special surprise to say thank you (Sprint);
  • Thank you for six great years (Harry’s);
  • Just a thank you note (and a 30% off coupon) (MacPaw);
  • You’re the best! (DAVIDsTEA);
  • Thank you for being a part of our journey (Masterclass);
  • Tell us what you think! (Clear);
  • Holiday Thanks (Postable);
  • ❤️Featuring YOU: Happy Thanksgiving From Brandless! (Brandless);
  • This gift is to thank you (Prezi).

Thank you for being a loyal customer

Subject For Thank You Email for Showing Interest

  • Thanks for dropping by! (Reebok);
  • Your thank-you code is waiting (GAP);
  • Thanks for staying! (HotelTonight);
  • Thanks for your purchase! (Ales Nesetril);
  • Thanks for your recent review (Google);
  • Your Feet Say Thank You (Allbirds).

Thanks for stopping by

Last post

Subject Line for Thank You Email: A/B Testing

Of course, when writing a thank you note to clients, the first thing to keep in mind is your audience, the established communication pattern, and the occasion. The subject line “Thanks, folks! You rock!” may be applicable for a teenage apparel retailer, but looks strange when sent by a five-star hotel or a health insurance provider.

Another method to detect effective subject line for a thank you email, aside from common sense and creativity, is split testing. Your own opinion may be subjective but the stats don’t lie. So, in case your email open rate has been recently falling down, or you feel you need an outside perspective, consider running an A/B test.

The process doesn’t require much effort or technical knowledge. For example, in our system, you can set unlimited numbers of variables (although we wouldn’t recommend more than two) and check which one your subscribers like the most.

Subject line A/B testing

The test results are shown in the email campaign report, and the winning option is labeled with a star.

Results of A/B testing

For more information, see our support article How to Test Email Subject Lines.

10 Email Examples with Great Thank You Email Subject Lines

… and why we like them

A good subject for thank you email can generate opens. Clicks, however, are generated by good content. Take a look at the below examples to get inspiration for your future thank-you letters.

1. Subject line for a Thank You email: Postcards From Your Adventurous Lives.

Email by Paravel

Why: customer photos give a sense of belonging to a big like-minded community.

2. Subject line: Not A Marketing Email.

Email by Brooklinen

Why: the message corresponds to the title – not a single CTA inside.

3. Thank you email subject line: Thank you for six great years.

Email by Harry's

Why: fun copy.

4. Subject line: You’re the best!

Email by David's Tea

Why: eye-friendly layout, not a lot of text, original greeting.

5. Thank You email title: Holiday Thanks?

Email by Postable

Why: The promoted product resonates with the occasion.

6. Subject line: 1.5 Million Donated! Thank you!

Email by Aer&Eden

Why: cute video with kids (but the copy definitely requires splitting into paragraphs).

7. Thank You email subject line: Langley Printed Rug – Thanks for Taking a Look!

Email by Pottery Barn

Why: they know how to use fonts and white space.

8. Subject line: Our first 50 Million.

Email by Rothy's

Why: designers from Rothy’s have mastered the gradient.

9. Thank You email subject line: These reviews give us all the feels.

Email by BeautyCounter

Why: a rather original reason to reach out.

10. Subject line: 2019 Year in Review... oh the places we've been.

Email by Mission Critical

Why:  report + social proof + customer appreciation in one email.

10 Reasons to Demonstrate Customer Appreciation in Email

1. Thank them for the subscription or registration

The very first email you send to welcome a new community member is a perfect place to say thank you. People have put trust in your brand, having chosen you among multiple options, so don’t keep it to yourself.

According to Email Marketing Benchmarks by GetResponse, welcome emails have the highest open rate of all campaigns — 91.43%. So, apart from expressing gratitude, consider adding a small gift or promo code to encourage the first purchase, be sure, people would see it.

Email by J.Crew

2. Celebrate achievements

No matter who they belong to, show that you care. For your customers, a loyalty club anniversary may be a big thing, so let them know you value their commitment.

Whatever your own milestones are, you definitely couldn’t have done it on your own. So acknowledge your customers’ contribution to your success.

Email by Readdle

3. Thank them for an order

Selling things is the ultimate goal of any business, and customers are the ones who make it happen. So why not come up with a thank you for your order messages, and thus encourage new interactions.

Thank you for your order

4. Thank them for participation in charity

You might have been running a donation program, a bonus exchange contest, or a holiday food drive, and some people definitely participated and made a difference. Even if your achievement can’t boast big numbers (like that huge 3 million pairs donated by Bombas), a thank you would encourage people for more active participation next time.

Email by Bombas

5. Thank them for staying with the brand

Whatever the occasion, 1 year or 20 years on the market, focus on the audience, not yourself. Yes, it’s your company’s party, but sharing is caring. Keep the audience connected to whatever is going in your team. And celebrate any event together.

Email by Mack Weldon

6. Thank them for participation in the event

A conference, a workshop, an open master class, a product presentation: you organized an event people took their time to commit to. Some of them came from far away, some brought their friends, and some actively participated in discussions. There’s no cool event without visitors, so thank your audience for participation and express the wish to see them next time as well.

Thank you for participation

7. Send holiday email congratulations

Although the end of the year is the kind of time when you draw the balance, don’t limit your gratitude to Christmas campaigns only. Be it Mother’s Day, Teachers’ Day, or your customer's birthday, thank for a partnership and interest in your service.

BarkBox did a great job sending the below congrats on Dog Day. The event resonates with the brand image, and the copy is written in a fun way, and you do read it till the end (we at Yespo did). No defocusing images or too pushy CTA make this email a great example of a reminder email.

Email by BarkBox

8. Thank them for referring friends

If customers keep returning to your brand, you provide a good service. And people, friends in the first place, deserve to know about good services. Thank your loyal followers for their trust and offer a small gift to forward friends with. It’s a good way to remind of your products or introduce a new range, and attract new users.

Email by Harry's

9. Thank them for reconsidering

An unusual approach to a cart abandonment design by CampSaver shows that imagination is your only limit. Thanks for stopping by instead of You left something behind catches attention and has a good chance to encourage to complete a purchase.

Email by CampSaver

10. Thank them for being an active community member

No doubt many of your customers may have shared your product on social media, forwarded friends, participated in local activities, donated bonuses, and given valuable feedback. In other words, they’ve been a loyal community, so celebrate their loyalty with a little incentive, like a surprise gift or free shipping.

Email by Food52

Tips to Write a Perfect Thank You Email Subject Line

Actually, the list of great thank you email subject lines can go on. But let’s find out how you can create one for your business by following the simple yet effective tips we are going to list below.

Keep it short and personalized

Keeping your email heading concise and personal is the rule of thumb. So, make sure you have added the recipient's name to either the header or the body of the letter, plus keep your subject line up to 5 words long.

Mention the reason for saying "Thank You"

When creating a subject line, it's tempting to just say "Thank you" and feel like you are done. However, it’s rarely the right approach. So, instead of just expressing your gratitude, mention the reason for doing it and find a way to show your appreciation to your customers. As an option, you can also provide them with a little gift or personalized discount, depending on the reason you are saying "Thank You".

Add a call-to-action to your thank you email

You may also use a thank you email to trigger some additional action. Fortunately, you have two subject lines, where the first is for the header, and the second for a pre-header. So, use the first one to put your main title, plus use the second one to create some intrigue. Here is what it can look like:

Header: Thank You For Subscribing to Our Newsletter!

Pre-header: Find Your Personalized Gift Inside ⏬

Get inspired by thank you email templates

In fact, you shouldn't reinvent the wheel to come up with a winning subject line. Instead, you can use some pre-developed email templates, for example, welcome series email templates available on our platform. You can also use these ideas for inspiration and customize your subject lines in a way you feel is suitable for your target audience.

Get help from AI

Yespo's email editor features a convenient AI assistant that you can use for generating subject lines. You can use it for both editing your existing options or even writing new headlines from scratch. 

Test different thank you email subject lines

Last but not least, test different subject lines to see which ones get the best open rates, and use that knowledge to improve your future email campaigns. For example, with the help of Yespo CDP, you can create stunning emails, send them automatically in response to the user's action, A/B test them, and track the performance of your campaigns in a single place.

Run your first email marketing campaign with Yespo!


A well-crafted thank you email can make all the difference in getting your message noticed and appreciated by the customers. We hope that this list of 50 thank you email subject lines has inspired you to write your own ones and improve your email communication with both new and loyal customers.

And the logical end to the article on Thank You email subject lines would be saying thank you for your interest and time. See you around.

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Iuliia Nesterenko

Technical Writer

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