Email Marketing Statistics You Need to Know in 2026

Email marketing continues to deliver exceptional results. 

Marketers are seeing returns of $36 to $42 for every dollar spent. 

For brands of all sizes, email remains the most useful channel for driving sales and building lasting customer relationships.

However, inboxes are more crowded than ever. The average person receives 121 business emails daily. 

This raises an important question: How effective is email marketing really in 2025?

• What kind of return on investment can you expect?
• How are AI and automation changing email campaigns?
• What engagement rates should you plan for?

In this guide, we share the latest email marketing statistics from Q4 2025 and recent months. These numbers will help you compare your performance and plan your strategy for 2026.

Top Email Marketing Statistics to Know in 2025

1. Email reaches 4.6 billion users globally in 2025. This makes it the largest and most accessible marketing channel.
2. Email delivers exceptional return on investment. Returns range from $36 to $42 for every $1 spent. This outperforms all other channels.
3. Artificial intelligence adoption has hit 63%. Campaigns powered by artificial intelligence drive 41% higher revenue than traditional approaches.
4. Automation is essential. Automated emails generate 320% more revenue despite representing just 2% of send volume.
5. Mobile optimization is critical. An 41.6% of emails are opened on mobile devices.

10 Latest Email Marketing Statistics to Know in 2026

Let’s start with the big picture. These stats will give you an understanding of email’s massive reach and continued growth.

1. The Number of Email Users Worldwide Reached 4.6 Billion in 2025

According to Hubspot marketing report, the global email user base hit 4.6 billion by the end of 2025. This represents approximately 58% of the world’s population.

Emails are the primary channel for communication. Today, more than half of humanity uses email for communication. Most users will access email on their mobile devices.

The bottom line is simple. Email is the largest marketing channel available. Brands of all sizes should be leveraging it.

Source: HubSpot 2026 Marketing Statistics Report

2. Daily Email Volume Exceeded 376 Billion Messages in 2025

An average of 376 billion emails is sent and received daily worldwide in 2025. That is 1.03 billion emails per day.

Moreover, the same number is estimated to reach 408.2 billion by 2027.

With this many emails flying around, you will need to make sure your brand stands out. 

You can do this through compelling subject lines, personalization, and genuine value in your customers’ inboxes.

Source: The Radicati Group Inc

3. The Global Email Marketing Market Will Reach $17.9 Billion by 2027

The email marketing industry is experiencing robust growth. It has a compound annual growth rate of 13.3%. The market will reach $17.9 billion by 2027.

This growth reflects increasing investment in sophisticated email platforms, artificial intelligence capabilities, and automation tools. 

Email inboxes remain one of the few marketing channels where customers have control. They volunteer their email address and can opt out anytime.

That is what makes email so valuable. Customers who opt in are genuinely interested in building a relationship with your brand.

Source: DemandSage

4. 81% of B2B Marketers Worldwide Use Email Marketing

Email marketing has achieved near-universal adoption. Currently, 81% of B2B marketers actively use it. 

Even more impressive is that 54% US businesses identify it as their most effective channel. This is more than any other option.

When the overwhelming majority of B2B marketers use a channel and consider it their top performer, it signals something important. 

It means the channel delivers consistently, which offers measurable results across industries.

Source: Sopro

5. Email Is One of the Top-Performing Marketing Channel for 40% of Marketers

In a survey of 250 marketers at business-to-business and business-to-consumer companies, email came out on top by a considerable margin.

Here are the top 5 best-performing marketing channels:

• Email (40%)
• Organic search (45%)
• Social media ads (39%)
• Organic social media (40%)

Source: Hubspot Marketing Statistics

6. Average Email Open Rate is at 43.46% in 2025

The average open rate across all industries was 43.46% in 2025. This is a slight increase from 42.35% in 2024.

Nearly 44% of recipients are opening marketing emails. This is a positive trend despite inbox saturation. 

While Apple’s Mail Privacy Protection has somewhat inflated open rates, the upward trend suggests better subject lines and sender reputation are working.

Source: MailerLite Email Benchmarks 2025

7. Click-to-Open Rate Increased to 6.81% in 2025

The average click-to-open rate rose to 6.81% in 2025. This is up from 5.63% in 2024. That represents a 21% year-over-year increase.

Click-to-open rate is becoming the most reliable engagement metric as open rates become less accurate.

This indicates that among those who opened an email, nearly 7% clicked through. This indicates strong content relevance and effective calls to action.

Source: MailerLite Email Benchmarks 2025

Now let’s talk money. How does email marketing translate into actual revenue?

8. Email Marketing Delivers $36 to $42 Return on Investment for Every $1 Spent

Email generates an average return of $36 to $42 for every dollar invested. This makes it one of the highest-performing digital marketing channels available.

That is a return on investment of 3,600% to 4,200%. This exceptional return explains why 87% of marketing leaders consider email critical to their company’s success.

On top of that, according to Statista, marketers worldwide rated email marketing ROI as follows:

• 17% reported low ROI
• 43% reported medium ROI
• 30% reported high ROI

In 2017, global marketers estimated that email marketing generated a media ROI of 124%, which was the highest among all digital channels measured. 

Further analysis shows that email performs especially well later in the funnel, helping drive conversions more effectively than other channels.

Email is also seen as one of the most effective channels for early engagement. 

In addition, sending emails to first-party lists is considered one of the best ways to build and nurture high-quality leads, as it relies on direct, permission-based communication.

Source: Statista | Omnisend

9. 63% of Marketers Now Use Artificial Intelligence Tools for Email Marketing

Nearly two-thirds of marketers utilize artificial intelligence tools in their email efforts. Among artificial intelligence adopters, 87% specifically apply it to email campaigns.

Artificial intelligence has reached mainstream adoption. It enables personalized, timely communication at scale that would be impossible manually.

Source: Influencer Marketing Hub

10. Artificial Intelligence-Driven Email Marketing Delivers 41% Higher Revenue

Marketers using artificial intelligence for personalization report revenue increases of over 40%. They also see click-through rates of 13.44%.

That is not just a productivity boost. It is a revenue driver. Artificial intelligence enables hyper-personalization at scale. It delivers the right message to the right person at the optimal time.

Source: DemandSage

11. 49% of Marketers Use Generative Artificial Intelligence for Email Copy Creation

Nearly half of email marketers have adopted generative artificial intelligence tools like ChatGPT for creating email content. 

Meanwhile, the use of artificial intelligence-powered image generation has increased by 340% in the last year.

Generative artificial intelligence dramatically reduces content creation time while maintaining quality. Marketers can produce more campaigns, test more variations, and respond faster to opportunities.

Source: MarTech Email AI Report

12. 41.6% of Emails Are Opened on Mobile Devices

Here is a breakdown of how people open their emails:

• 41.6% on mobile devices
• 40.6% using webmail
• 16.2% using desktop apps
• 1.6% in other environments

This statistic is significant. It shows just how critical mobile optimization has become. Emails not optimized for mobile face higher deletion rates and lower engagement.

Source: Litmus Email Analytics

13. Personalized Subject Lines Increase Open Rates by 26% to 50%

Simple personalization tactics work. Including the recipient’s name or referencing recent behavior in subject lines significantly boosts opens. Currently, 64.7% of marketers use subject line personalization in at least half their campaigns.

Subject lines are your first chance to capture attention. Often, it is your only chance. Personalization signals relevance and makes emails feel less like mass marketing.

Source: Campaign Monitor Personalization

14. 78% of Consumers Engage with Personalized Offers Tailored to Their Interests

Personalized content and offers generate significantly higher engagement than generic promotional messages. Consumers respond positively when brands demonstrate understanding of their preferences.

You can base personalized emails on recent purchases, cross-sell or upsell recommendations, browsing behavior, or information about causes your brand supports.

Source: Deloitte

15. 43% of Email Recipients Decide to Open Based on the Subject Line

A clear and catchy subject line still matters. At the same time, the subject line strongly influences how an email is judged. 

Many recipients decide whether an email belongs in the inbox or the spam folder based only on that single line. 

This puts a lot of pressure on the subject line and highlights how much first impressions affect email campaign performance.

Source: Zerobounce Marketing Report

16. Which Days Get Better Email Opens and Clicks

Email engagement remains fairly consistent throughout the week, but some days perform slightly better than others. 

According to the data, Monday shows the highest average open rate at 47.62%, followed closely by Friday at 47.48% and Tuesday at 47.38%.

Open rates remain steady through Wednesday and Sunday, while Thursday records the lowest average open rate at 46.65%.

When it comes to clicks, Tuesday leads with the highest average click rate at 7.11%, followed by Friday at 7.10% and Monday at 7.09%.

Click rates gradually decline toward the weekend, with Saturday and Sunday seeing the lowest engagement, both below 6.9%.

Overall, weekdays tend to deliver slightly stronger engagement than weekends.

For ecommerce brands, sending emails on Tuesday, Friday, or Monday aligns well with higher open and click activity, while weekend sends may see reduced interaction.

Source: Mailerlite

17. The Unsubscribe Rate Increased to 0.22% in 2025

The average unsubscribe rate more than doubled to 0.22% in 2025. This is compared to 0.08% in 2024.

Gmail’s prominent “Unsubscribe” button has made it easier for recipients to leave lists.

Higher unsubscribe rates signal issues with list hygiene, sending frequency, or content relevance.

Monitor this closely. Offer preference centers where subscribers can adjust settings rather than unsubscribing entirely.

Source: MailerLite Benchmarks 2025

TL;DR of Email Marketing Statistics

Email marketing still works well in 2025. The numbers show that it delivers strong returns, reaches a wide audience, and continues to perform better than many other channels.

That said, inboxes are more crowded than ever. To get results, brands need to send emails that are relevant, well-timed, and consistent. Campaigns that focus on mobile, personalization, and user behavior tend to perform better.

AI and automation have also become part of everyday email marketing. When used properly, they help teams personalize at scale and work more efficiently. Brands that respect user preferences and rely on first-party data will be in a stronger position moving into 2026 and beyond.

Frequently Asked Questions (FAQs)

1. Is email marketing still worth investing in for 2026?

Yes. The data shows that email continues to deliver one of the highest returns among digital channels. With strong ROI, wide reach, and growing use of automation and artificial intelligence, email remains a practical and scalable investment for most businesses.

2. What matters more today subject lines or sender reputation?

Both matter, but consistency matters more. While subject lines influence opens and inbox placement, people are more likely to open emails from brands that regularly send useful and relevant content. Trust built over time plays a major role in engagement.

3. How important is artificial intelligence in email marketing now?

Artificial intelligence is becoming standard in email marketing. Many marketers already use it for personalization, content creation, and timing. The data shows that campaigns using artificial intelligence often see higher revenue and better engagement.

4. What engagement metrics should marketers focus on in 2026?

Click-to-open rate is becoming more important as open rates grow less reliable. Unsubscribe rates, mobile engagement, and response to personalized content also provide better insight into how emails are performing and how audiences are reacting.