How to Write the Best Email Subject Lines for eCommerce

Email marketing was and still is one of the most effective digital marketing tools for driving sales for your eCommerce platform. The key to a successful email campaign primarily depends on the subject lines and how engaging and curious they are.

Knowing how to write the best email subject lines for eCommerce is crucial here. It requires creativity and attention to detail. Luckily, due to the revolution of digital media tools, making the best email subject lines for eCommerce promotion is quite easy. 

You just need to put raw text data, and AI-based tools will provide written pieces according to the email subject line’s best practices. 

Sounds easy, doesn’t it?

But there are a few nuances to consider. This guide will discuss how to write the best email subject lines for eCommerce, the top 5 best subject line generators, and some pro tips that will make you stand out.

So, without further ado, let’s dive into the details, shall we?

Why Is Writing Engaging Email Subject Lines Important for Your eCommerce Business?

You may not think about it much, but when it comes to eCommerce email marketing, an engaging subject line is all it takes to drive traffic to your eCommerce platform. 

Why? Your email subject line determines whether the mail gets opened or ignored, as 100 other promo emails users get daily. 

According to Venngage, the average person receives around 120 emails per day. Among them, 50% is said to be promotional mail. 

So, how can you stand out? By doing what others aren’t, which is being attractive to the people who see the subject line. 

When you have a compelling and interesting subject line, you’ll get:

  • Higher chance of opening
  • Increased click-through rates
  • Better customer engagement
  • Increase in brand perceptions
  • Growth in conversions and sales

This is why finding the best email subject lines for sales should be one of your top priorities, especially if you plan to build a solid audience base for your eCommerce. 

5 Best Email Subject Line Generator for You in 2024

Now that you have the general picture of email subject lines and their impact. Let’s look at how to write the best email subject lines without needing to be a copywriting professional. The route you should take is email subject line generators. 

While there are thousands of text generators available, the following 5 are hailed as the best both in performance and ease of use:

When it comes to email subject line generators, will be at the top of the list for every reviewer. This text-generation tool is fast, effective, and generates humane results that others just can’t. 

The tool utilizes deep learning and natural language processing to generate content that fits your desires. Just upload your raw text data and watch work its magic to create a magnificent email subject line.

Unique Features

  • AI-driven suggestions centered around your input
  • 100+ templates to choose from
  • Free email line generator
  • Customizable tone and style
  • Integration with various marketing platforms
  • Real-time collaboration with team members


There is a total of 3 different payment plans for, these are:

  • Free Plan (1 Seat, 2000 Words limit): 0$ Per Month
  • Pro Plan (5 Seat, Unlimited Words): 49$ Per Month
  • Team (20 Seat, Unlimited Words): 249$ Per Month

You can also sign up for custom plans, including yearly plans that offer exclusive discounts and additional services.


Another well-known and effective marketing tool for eCommerce marketing is CoSchedule. It works as your personal social media manager with explained insights and suggestions.

You can use CoSchedule’s Headline Analyzer to evaluate the subject lines you have created for your promotional emails. 

The tool will also provide you with suggestions and an evaluation score based on factors like sentiment, word balance, engagement, and more!

Unique Features

  • Detailed analysis of your email subject line performance
  • Insights into word choice and structure
  • AI assistant for recommendations for improvement
  • Historical data tracking for continuous optimization


CoSchedule offers 2 general price points:

  • Free Calendar: 0$ Per Month
  • Social Calendar: 19$ Per Month

They offer two other pricing plans, Content Calendar and Marketing Suite. However, both are custom plans suitable only for those running multiple platforms.

Next is, a well-known digital marketing tool for SEO specialists. Their AI writing assistant and paraphrasing tool can help you develop engaging and unique email subject lines. The evaluation score metrics will showcase how effective your subject line would be!

Unique Features

  • AI-generated suggestions based on target keywords
  • Customizable subject line templates
  • Optimized sentence rewriter


You can access 4 different price plans for

  • Free Trail: 0$ Per Month
  • Solo: 15$ Per Month
  • Basic: 45$ Per Month
  • Team: 115$ Per Month


All the tools mentioned focused on not only email marketing but other aspects of SEO and digital marketing. But what if you want a tool that focuses solely on email marketing? Well, the answer is Encharge

You will get a complete system that sends scheduled emails, generates titles, and more. It’s your complete email marketing solution.

Unique Features

  • Integration with CRM and eCommerce platforms
  • Personalized subject lines with the help of an AI text generator
  • Scheduling and subscriber system


There are a total of 3 price plans for Encharge:

  • Growth: 79$ Per Month
  • Premium: 129$ Per Month
  • Enterprise: Custom Pricing


Last but not least, it’s Mailmunch. This lead and email boosting tool also offers an engaged subject line while offering a complete email marketing tool. You can set up fully personalized emails for everyone in your subscriber list. The unique segmentation and intelligent use of AI make this a standout tool for any e-commerce marketing.

Unique Features

  • Personalized subject line recommendations
  • User-friendly interface with drag-and-drop functionality
  • Pre-built templates and customization options
  • Real-time analytics and performance tracking


Mailmunch offers a custom price point based on their client’s demands. But there’s one universal price plan that they offer:

  • Premium: 19.99$ Per Month

How to Use Tool to Generate the Best Email Subject Line for Your eCommerce Business

Imagine you’re an eCommerce clothing store and want to reach out to your customers with enticing summer deals. Here’s how can help you generate an effective email subject line:

1. Set Up Account: First off, you gotta go to . Once you’re there, you have to create your account.

login to

2. Give Your Prompt to Chat: Go to the homescreen after you’re done with the verification.

home screen of

There’s an option that says ‘Browse Prompts’. Select it and get ideas from it.

Select 'Browse Prompts' and get ideas from it.

It will take you to a chatbox. You’ll be able to create more optimal prompt now. 

You can  try this sample prompt below.

“Create 5 action oriented and engaging email subject line for an upcoming summer sale campaign targeted exciting customers. Ensure the subject line is concise, enticing, and relevant to drive open rates and conversions.”

3. Get Results: Once the tool gets the text data, it will generate multiple samples that you can use.

If you want to get the best results using, you must take your target audience into account. In fact, when selecting the subject line, you’ll have to think about the overall tone of your brand.

If your brand is known for being playful, “Heat Up Your Savings: Unbeatable Deals in Our Summer Sale!” might be a good fit.

If your brand is offering some limited-time nature of the sale, you can use the option”Don’t Miss Out: Up to 50% Off in Our Summer Sale!“.

Highlight the benefits for your customers as well. You can use “Shop Now for Your Summer Essentials – Amazing Discounts Inside!“.


  • Keep it concise (ideally under 50 characters).
  • Personalize it if possible (e.g., include the customer’s name).
  • Test different subject lines to see what resonates best with your audience. is able to generate the most optimal solution based on your selection. You don’t need to go through any complex steps.

Bonus: Expert Tips to Write the Best Email Subject Line for eCommerce Businesses

eCommerce AI tools will only take you so far unless you invest yourself to create the best email subject line for yourself. Here are a few things that you should keep in mind when developing an email subject line for your eCommerce business:

  • Keep It Concise: Make sure the subject line is not too much wordy. Keep it on point. The characters shouldn’t be more than 50. The sentences should be completely visible on the mobile devices. 
  • Highlight the Benefit: Hook your reader by describing the value or the benefit you’ll be able to deliver them..
  • Create a Sense of Urgency: You should use time-sensitive language to encourage immediate action, such as “Limited Time Offer” or “Ends Today.”
  • Personalize When Possible: Include the recipient’s name or other personal details to make the email feel more relevant. This will make the readers feel more connected.
  • Use Compelling Language: Utilize powerful words that evoke curiosity or excitement. Try using words like “exclusive,” “secret,” or “insider.”
  • A/B Test Different Options: Always test multiple subject lines. This will give you insight on which subject line is the best for your audience. 
  • Avoid Spam Triggers: Make sure to steer clear of words and phrases commonly associated with spam, such as “free,” “guarantee,” and excessive punctuation.


Crafting the best email subject lines for eCommerce is an art that combines creativity, strategy, and technology. By using tools like, and CoSchedule, you can generate compelling subject lines. This will boost your open rates and drive more sales. But make sure to add your personal touch to maximize the impact!

Josée Le
Josée Le

Hi there, it’s Josée, a dynamic blogger, digital creator and she’s not just a wordsmith – she’s also tech-savvy. Being an INFJ-A, she always seeks freedom and makes things perfect in their ways. Her passion extends to travel, as a travel enthusiast, she immerses herself in different cultures, where she captures the essence of her experiences and brings a unique perspective to her content.

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