Email Marketing

10 Interesting Facts & Statistics About Email Marketing

Numbers that tell you where email marketing is going!




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Between 2019 and 2022, the number of email users worldwide has grown from 3.9 billion to 4.2 billion. That's a lot of people with email addresses! And we all know that email marketing is one of the most effective ways for brands to connect with their audience as well as sell products and services. But there are some statistics out there that might surprise you about how effective (or not) this popular form of digital marketing really is!

In 2021, about 319.6 billion emails were sent and received each day.

Did you know that in 2021, the estimated number of emails sent and received per day worldwide rose to 319.6 billion, and the figure is expected to reach 376.4 billion by 2025?

That’s an incredible number. It’s a good example of how email marketing has become a huge part of our daily lives.

The interesting thing is that the number doesn't count spam emails—just legitimate ones!

Today, email marketing has emerged as an important tool for reaching out to your customers. From discounts to promotion offers to latest updates to special offers or even just engaging them with thoughtful content. In addition, there are numerous ways emails help keep customers attached to a business/brand.

Are you leveraging email marketing to scale your business?

There are 4.2 billion email users.

According to the Pew Research Center, a whopping 1 in 3 people worldwide is using email. That's a lot of people! In fact, it's more than any other communication channel besides text messaging—and even then, it's only by a hair. In 2021, the number of unique mobile internet users stood at 4.32 billion, indicating that over 90 percent of the global internet population uses a mobile device to go online.

As of 2022, the number of global e-mail users is 4.2 billion and is expected to grow to 4.6 billion in 2025.

The bottom line? Email marketing is the primary source of leads and sales these days. Especially with a growing number of global email users with each passing day, it’s more important than ever to leverage email marketing.

If you are wondering how and to whom to target in email marketing, Outbound can help you build lists and prospects. It uses complex machine learning and artificial intelligence to ensure that their users receive the most accurate and validated information on their leads. You may also sign up for their free version.

Average email open rate across all industries is 21.33%.

A study by Mailchimp shows that the average email open rate across all industries is 21.33%. However, depending on your industry and the type of emails you send, your average open rate can be much higher or lower.

More targeted emails also tend to have better response rates than less targeted ones because they are more relevant to their recipients’ interests and needs. For example, if someone is looking for a new job in marketing then they will be more likely to read an email from a B2B recruitment agency than they would a generic “employment services” message from an agency which covers multiple areas including sales and account management roles too!

Emails with personalized subject lines are 26% more likely to be opened.

According to a study by Experian, emails with personalized subject lines are 26% more likely to be opened. This means properly using a personalized subject line is a great way to increase email engagement and boost open rates.

As you write your email’s content, you should be thinking about what information would be most useful for your readers, as well as how you can make it relevant to them by including their names or other personal information.

For example, let's say that we’re sending an email to John Smith about my product launch at the end of this month. We could use something like "John - We're Launching Our New Product!" or "John - Here's What You Missed At The Launch Party!". In both cases, we've personalized our subject line with John's first name so that he knows exactly who this email is from before even reading it!

Personalized promotional emails generate 6 times higher transaction rates.

Personalized emails are a great way to stand out from the crowd, build trust with your customers and increase transaction rates.

In fact, personalized promotional emails generate 6 times higher transaction rates than non-personalized or general ones.

Personalization is also a great way to build an ongoing relationship with customers by sending them special offers or discounts based on their past activity with you.

According to the data, still rely on email as their primary customer acquisition channel, and 

Over 80% of businesses use email marketing to acquire customers and retain them.

About 81% of SMBs use email marketing solely for customer acquisition and 80% for retention (Emarsys, 2018), which is more than any other form of marketing.

The reason is simple.

Email marketing is more cost-effective than other forms of digital and offline advertising because it requires less time and effort from your team, and the results are measurable. Your ROI will be directly tied into the number of emails sent out (and opened) as well as how engaged recipients are with each email campaign you send out.

Email is 40 times more effective at acquiring new customers than Facebook or Twitter

There are many ways to build a relationship with customers. Email is one of the best. That's why it's 40 times more effective at acquiring new customers than Facebook or Twitter, according to McKinsey & Company.

Email is a great way to get in touch with your customers, but not just anyone can do it—you need permission from them first. You can't email people unless they want you to, so asking for permission upfront makes sure that you're included in their inboxes when it matters most.

The more emails you send and receive from someone, the greater the chances that they'll respond positively when you ask them questions or make requests later on down the line. This process takes time and patience but will pay off eventually if done right!

Emails have an expected ROI of 4200%

You may have heard that email marketing is one of the most effective ways to grow your business, but you're still unsure of how exactly it works. To break it down for you, let's take a look at some of the numbers behind this popular channel:

  • The average ROI from email marketing is 4200%. That means a revenue of $42 for every $1 spent. That's more than any other channel! In fact, email has been shown to be seven times more profitable than social media or search engine ads.

  • Emails are an integral part of the customer journey; they help bridge the gap between brand awareness and conversion by providing relevant information about products and services at every step of their path toward purchase.

Email marketing allows businesses to build relationships with their customers by delivering targeted messages at each stage in the buying process: from discovery (when someone learns about your brand) all the way through a purchase (when they make a purchase).

Segmented campaigns drive a 760% increase in revenue

According to DMA, marketers have found a 760% increase in email revenue from segmented campaigns. They're more effective because they deliver a better experience for your customers. They're targeted, personalized, relevant, and timely. And that's just the beginning of what makes them so powerful.

Segmented campaigns are more actionable: A segmented campaign can help you reach out to specific groups of customers who have demonstrated an interest in or affinity for particular products or services (e.g., people who've purchased from you before). This means that your email marketing messages will be more relevant to those recipients and increase engagement rates as well as conversion rates.

A/B testing can improve the conversion rate by 49%

A/B testing is a method of comparing two versions of a webpage, with the goal of determining which version is better. It's used to optimize conversion rates by testing small changes in your web page design and content. In fact, a successful A/B test has the potential to boost conversion rates by 49%.


Email is still one of the most effective and successful marketing channels to date. With so many users around the world, it’s no wonder that there are so many opportunities for businesses to grow their brands with this medium. We hope that these interesting facts & statistics about email marketing were insightful for you!

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Table of Contents

    In a nutshell

    It's estimated that over 300 billion emails are sent and received each day worldwide.
    As of 2021, there are over 4.1 billion email users worldwide.
    The average email open rate across all industries is around 18%.
    Personalized emails are around 29% more likely to be opened than non-personalized emails.
    Email is around 40 times more effective at acquiring new customers than Facebook or Twitter.
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