Latest email marketing data on open rates, ROI, automation, and trends from 2023-2024. Industry benchmarks and insights for marketers.
Latest email marketing data on open rates, ROI, automation, and trends from 2023-2024. Industry benchmarks and insights for marketers.
April 8, 2026
April 8, 2026
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Email remains one of the largest communication channels globally, with billions of users sending and receiving messages daily. Understanding email scale helps marketers appreciate the channel's reach and competitive landscape. These metrics show sustained growth in both user base and message volume year over year.
As of 2024, email reached more than half the global population, making it the single largest direct communication channel available to marketers. That user base is projected to grow to 4.89 billion by 2027, meaning the addressable audience for email marketing continues to expand year over year.
Global daily email volume reached 361.6 billion in 2024, a 4.1% increase from the previous year. That consistent single-digit annual growth rate signals a stable, maturing channel rather than a declining one, giving marketers a reliable infrastructure to build on.
From 361.6 billion daily emails in 2024, global volume is projected to grow by roughly 12.9% to reach 408.2 billion by 2027. For email marketers, this means inbox competition will intensify, placing greater importance on relevance, timing, and deliverability.
Email remains one of the largest communication channels globally, with billions of users sending and receiving messages daily. Understanding email scale helps marketers appreciate the channel's reach and competitive landscape. These metrics show sustained growth in both user base and message volume year over year.
As of 2024, email reached more than half the global population, making it the single largest direct communication channel available to marketers. That user base is projected to grow to 4.89 billion by 2027, meaning the addressable audience for email marketing continues to expand year over year.
Global daily email volume reached 361.6 billion in 2024, a 4.1% increase from the previous year. That consistent single-digit annual growth rate signals a stable, maturing channel rather than a declining one, giving marketers a reliable infrastructure to build on.
From 361.6 billion daily emails in 2024, global volume is projected to grow by roughly 12.9% to reach 408.2 billion by 2027. For email marketers, this means inbox competition will intensify, placing greater importance on relevance, timing, and deliverability.
The email marketing industry crossed the $9.5 billion revenue mark in 2024 and is on track to reach $17.9 billion by 2027, reflecting a compound annual growth rate of 13.3%. This level of investment underscores how central email remains to the overall digital marketing budget.
Nearly two-thirds of email marketers reported sending higher volumes than in prior periods, a sign of growing confidence in the channel. With send volumes rising across the board, standing out in a crowded inbox requires stronger segmentation and more relevant content strategies.
As of April 2024, the United States topped all countries in daily email volume at approximately 9.7 billion emails sent per day. Germany and Ireland followed at 8.5 billion and 8.4 billion respectively, confirming that email's heaviest usage is concentrated in North America and Western Europe.
Promotional email volume jumped by approximately 33% from 2022 to 2023, reflecting brands leaning more heavily into email as a direct revenue driver. This sharp increase in marketing sends makes inbox placement and sender reputation more critical than ever for maintaining deliverability.
More than half of surveyed small business owners across four major markets ranked email as their go-to channel for finding new customers and retaining existing ones in 2024. This adoption rate, drawn from Constant Contact's Small Business Now report, shows email is not just an enterprise tool but a practical growth lever for businesses of every size.
The email marketing industry crossed the $9.5 billion revenue mark in 2024 and is on track to reach $17.9 billion by 2027, reflecting a compound annual growth rate of 13.3%. This level of investment underscores how central email remains to the overall digital marketing budget.
Nearly two-thirds of email marketers reported sending higher volumes than in prior periods, a sign of growing confidence in the channel. With send volumes rising across the board, standing out in a crowded inbox requires stronger segmentation and more relevant content strategies.
As of April 2024, the United States topped all countries in daily email volume at approximately 9.7 billion emails sent per day. Germany and Ireland followed at 8.5 billion and 8.4 billion respectively, confirming that email's heaviest usage is concentrated in North America and Western Europe.
Promotional email volume jumped by approximately 33% from 2022 to 2023, reflecting brands leaning more heavily into email as a direct revenue driver. This sharp increase in marketing sends makes inbox placement and sender reputation more critical than ever for maintaining deliverability.
More than half of surveyed small business owners across four major markets ranked email as their go-to channel for finding new customers and retaining existing ones in 2024. This adoption rate, drawn from Constant Contact's Small Business Now report, shows email is not just an enterprise tool but a practical growth lever for businesses of every size.
Open rates and click-through rates are foundational metrics for measuring campaign performance. This section covers average benchmarks across industries, email types, and how these metrics have evolved. Note that some changes reflect platform updates like Apple Mail Privacy Protection.
MailerLite's benchmark report, based on over 3.6 million campaigns, found the cross-industry average open rate reached 42.35% in 2024, rising further to 43.46% in 2025. Marketers should interpret these figures with caution, as Apple Mail Privacy Protection inflates reported opens by preloading emails on Apple devices regardless of whether a user actually reads them.
GetResponse analyzed more than 4 billion emails sent by its customers throughout 2023 and found average open rates climbed 12.84 percentage points year over year. Part of this growth reflects Apple MPP auto-opens, but click-through rates also rose, suggesting real improvements in content relevance and personalization played a role.
MailerLite's analysis of 3.6 million campaigns found the average click rate held at 2% in 2024 before edging up to 2.09% in 2025. Because click rate is not distorted by Apple MPP, it is now considered a more reliable indicator of actual newsletter engagement than open rate alone.
MailerLite's benchmark data shows CTOR climbed from 5.63% in 2024 to 6.81% in 2025, with industry-level ranges spanning from 2.96% to 14.82%. CTOR is particularly useful for diagnosing content quality: a high CTOR alongside a low open rate indicates that subscribers who do open find the content worth clicking, pointing to a subject line or deliverability problem rather than a content problem.
HubSpot's email benchmark compilation reports a cross-industry CTOR of 5.3%, reinforcing that post-Apple MPP, CTOR and click-through rate have become the primary performance indicators for campaign content effectiveness, replacing open rate as the go-to engagement signal.
Open rates and click-through rates are foundational metrics for measuring campaign performance. This section covers average benchmarks across industries, email types, and how these metrics have evolved. Note that some changes reflect platform updates like Apple Mail Privacy Protection.
MailerLite's benchmark report, based on over 3.6 million campaigns, found the cross-industry average open rate reached 42.35% in 2024, rising further to 43.46% in 2025. Marketers should interpret these figures with caution, as Apple Mail Privacy Protection inflates reported opens by preloading emails on Apple devices regardless of whether a user actually reads them.
GetResponse analyzed more than 4 billion emails sent by its customers throughout 2023 and found average open rates climbed 12.84 percentage points year over year. Part of this growth reflects Apple MPP auto-opens, but click-through rates also rose, suggesting real improvements in content relevance and personalization played a role.
MailerLite's analysis of 3.6 million campaigns found the average click rate held at 2% in 2024 before edging up to 2.09% in 2025. Because click rate is not distorted by Apple MPP, it is now considered a more reliable indicator of actual newsletter engagement than open rate alone.
MailerLite's benchmark data shows CTOR climbed from 5.63% in 2024 to 6.81% in 2025, with industry-level ranges spanning from 2.96% to 14.82%. CTOR is particularly useful for diagnosing content quality: a high CTOR alongside a low open rate indicates that subscribers who do open find the content worth clicking, pointing to a subject line or deliverability problem rather than a content problem.
HubSpot's email benchmark compilation reports a cross-industry CTOR of 5.3%, reinforcing that post-Apple MPP, CTOR and click-through rate have become the primary performance indicators for campaign content effectiveness, replacing open rate as the go-to engagement signal.
Email consistently delivers the highest ROI of any digital marketing channel. These statistics demonstrate how much revenue businesses generate per dollar spent, consumer purchase behavior triggered by email, and why marketers prioritize email in their mix.
Email consistently delivers a 3,600% average return on investment, making it the highest-ROI channel in digital marketing. For context, SEO averages 317-1,389% ROI and social media sits at roughly 250%, meaning email outperforms both by a significant margin.
Nearly 1 in 5 businesses achieves an email marketing ROI of 7,000% or higher. This top-tier performance is typically driven by strong list hygiene, behavioral segmentation, and consistent automation investment.
More than half of consumers completed a purchase triggered by a marketing email, according to Marigold's 2024 Consumer Trends Index. Email outperformed social media posts by 13% and social media ads by 11% as a direct purchase driver.
Automated workflows are extraordinarily efficient: they punch far above their weight by converting at rates impossible for broadcast campaigns. This is why cart abandonment, welcome, and post-purchase sequences are typically the highest-ROI investments in any email program.
Industry matters when benchmarking email ROI. Retail and e-commerce lead all sectors at a 45:1 return, followed by travel and hospitality at $53:1. Software and technology companies average $36:1, still well ahead of other digital channels.
The market has grown at a 13.3% compound annual growth rate since 2020 and is projected to reach $17.9 billion by 2027. This sustained investment growth reflects the channel's measurable returns relative to rising paid media costs.
Email consistently delivers the highest ROI of any digital marketing channel. These statistics demonstrate how much revenue businesses generate per dollar spent, consumer purchase behavior triggered by email, and why marketers prioritize email in their mix.
Email consistently delivers a 3,600% average return on investment, making it the highest-ROI channel in digital marketing. For context, SEO averages 317-1,389% ROI and social media sits at roughly 250%, meaning email outperforms both by a significant margin.
Nearly 1 in 5 businesses achieves an email marketing ROI of 7,000% or higher. This top-tier performance is typically driven by strong list hygiene, behavioral segmentation, and consistent automation investment.
More than half of consumers completed a purchase triggered by a marketing email, according to Marigold's 2024 Consumer Trends Index. Email outperformed social media posts by 13% and social media ads by 11% as a direct purchase driver.
Automated workflows are extraordinarily efficient: they punch far above their weight by converting at rates impossible for broadcast campaigns. This is why cart abandonment, welcome, and post-purchase sequences are typically the highest-ROI investments in any email program.
Industry matters when benchmarking email ROI. Retail and e-commerce lead all sectors at a 45:1 return, followed by travel and hospitality at $53:1. Software and technology companies average $36:1, still well ahead of other digital channels.
The market has grown at a 13.3% compound annual growth rate since 2020 and is projected to reach $17.9 billion by 2027. This sustained investment growth reflects the channel's measurable returns relative to rising paid media costs.
Marketers are increasingly leveraging automation, AI, and personalization to improve results. This section covers adoption rates, effectiveness of these tactics, and how they impact engagement and conversion. Generative AI adoption is transforming how teams create and optimize campaigns.
AI adoption in email has crossed the majority threshold, with nearly two-thirds of marketers integrating it into their programs. By analyzing customer behavior, automating content creation, and optimizing send times, AI helps teams hit higher engagement rates without proportionally increasing workload.
Among all the functions where AI can be deployed, email marketing ranks as the primary application area. This concentration signals that marketers see email as the highest-ROI channel for AI implementation, where machine learning can predict timing, personalize content, and analyze engagement patterns at scale.
This is the clearest business case for automation: a tiny share of send volume produces more than a third of total email revenue. Triggered sequences such as welcome emails, abandoned cart flows, and post-purchase messages consistently outperform broadcast sends because they reach subscribers at the highest-intent moments.
A 2023 survey of email marketers across the US, UK, and other European countries found a majority reporting better results with AI than without it. Roughly 20% saw no significant difference, suggesting AI delivers a meaningful but not universal lift, which makes proper implementation and testing essential.
Email overtook content marketing and social media management as the channel that relies most heavily on automation. This reflects both the maturity of email platforms and the volume of touchpoints marketers need to cover across the customer lifecycle without adding headcount.
Marketers are increasingly leveraging automation, AI, and personalization to improve results. This section covers adoption rates, effectiveness of these tactics, and how they impact engagement and conversion. Generative AI adoption is transforming how teams create and optimize campaigns.
AI adoption in email has crossed the majority threshold, with nearly two-thirds of marketers integrating it into their programs. By analyzing customer behavior, automating content creation, and optimizing send times, AI helps teams hit higher engagement rates without proportionally increasing workload.
Among all the functions where AI can be deployed, email marketing ranks as the primary application area. This concentration signals that marketers see email as the highest-ROI channel for AI implementation, where machine learning can predict timing, personalize content, and analyze engagement patterns at scale.
This is the clearest business case for automation: a tiny share of send volume produces more than a third of total email revenue. Triggered sequences such as welcome emails, abandoned cart flows, and post-purchase messages consistently outperform broadcast sends because they reach subscribers at the highest-intent moments.
A 2023 survey of email marketers across the US, UK, and other European countries found a majority reporting better results with AI than without it. Roughly 20% saw no significant difference, suggesting AI delivers a meaningful but not universal lift, which makes proper implementation and testing essential.
Email overtook content marketing and social media management as the channel that relies most heavily on automation. This reflects both the maturity of email platforms and the volume of touchpoints marketers need to cover across the customer lifecycle without adding headcount.
Mobile email consumption continues to grow, and deliverability remains critical to campaign success. These stats highlight device preferences, email client performance, and the percentage of emails reaching inboxes across providers and industries.
Mobile has firmly become the dominant environment for reading email. Marketers who skip mobile optimization are effectively designing for a minority of their audience, since more than half of all opens now happen on phones.
Despite mobile opens dominating, nearly half of marketers had not yet committed to mobile-first design as of mid-2023. This gap between device usage reality and design practice represents a direct risk to click-through rates and conversions.
Apple Mail leads with roughly 56-58% market share, while Gmail holds approximately 29-32%. This near-duopoly means rendering performance in just two environments determines the inbox experience for the vast majority of subscribers.
Even with the best authentication practices in place, roughly 1 in 7 emails failed to reach the inbox in 2023. This underscores why deliverability cannot be treated as a passive outcome and requires active monitoring.
Email deliverability decreased 1.9% year-over-year in 2024, meaning nearly 1 in 6 promotional emails never reached the intended inbox. This decline happened despite increased industry focus on authentication and list hygiene, indicating that traditional deliverability tactics are losing effectiveness.
The nearly 12-percentage-point gap between Gmail and Microsoft inbox placement rates means senders with large Outlook audiences face a materially harder deliverability challenge. Provider-specific optimization, including stricter engagement segmentation and authentication, is no longer optional for high-volume senders.
Mobile email consumption continues to grow, and deliverability remains critical to campaign success. These stats highlight device preferences, email client performance, and the percentage of emails reaching inboxes across providers and industries.
Mobile has firmly become the dominant environment for reading email. Marketers who skip mobile optimization are effectively designing for a minority of their audience, since more than half of all opens now happen on phones.
Despite mobile opens dominating, nearly half of marketers had not yet committed to mobile-first design as of mid-2023. This gap between device usage reality and design practice represents a direct risk to click-through rates and conversions.
Apple Mail leads with roughly 56-58% market share, while Gmail holds approximately 29-32%. This near-duopoly means rendering performance in just two environments determines the inbox experience for the vast majority of subscribers.
Even with the best authentication practices in place, roughly 1 in 7 emails failed to reach the inbox in 2023. This underscores why deliverability cannot be treated as a passive outcome and requires active monitoring.
Email deliverability decreased 1.9% year-over-year in 2024, meaning nearly 1 in 6 promotional emails never reached the intended inbox. This decline happened despite increased industry focus on authentication and list hygiene, indicating that traditional deliverability tactics are losing effectiveness.
The nearly 12-percentage-point gap between Gmail and Microsoft inbox placement rates means senders with large Outlook audiences face a materially harder deliverability challenge. Provider-specific optimization, including stricter engagement segmentation and authentication, is no longer optional for high-volume senders.
B2B marketers rely heavily on email for lead nurturing and content distribution. Email newsletters rank as a top tactic for B2B engagement. These statistics show how email performs in professional contexts and why it dominates B2B strategy.
Email newsletters rank as the single most widely adopted content format in B2B marketing, outpacing blog posts, social media, and video. This signals that newsletters are not just a supplementary tactic but the backbone of B2B content distribution strategies.
According to the Content Marketing Institute's 2025 report, nearly three in four B2B marketers relied on email newsletters as a lead nurturing channel over the previous 12-month period, making it one of the highest-adoption tactics in the B2B playbook.
Half of U.S. B2B marketers rank email above social media, content marketing, and paid channels when measuring multichannel impact. This makes email the clear centerpiece of professional marketing stacks, not just one channel among many.
A Sagefrog survey found that email marketing leads all other B2B marketing tactics by adoption rate, with social media, blogging, and SEO all trailing behind. This reinforces email as the default starting point for B2B marketers building or expanding their programs.
NetLine's 2023 State of B2B Content Consumption and Demand Report recorded a 307% spike in year-over-year newsletter registrations, indicating that demand for email newsletters from B2B buyers, not just from marketers, surged sharply heading into 2024.
B2B marketers rely heavily on email for lead nurturing and content distribution. Email newsletters rank as a top tactic for B2B engagement. These statistics show how email performs in professional contexts and why it dominates B2B strategy.
Email newsletters rank as the single most widely adopted content format in B2B marketing, outpacing blog posts, social media, and video. This signals that newsletters are not just a supplementary tactic but the backbone of B2B content distribution strategies.
According to the Content Marketing Institute's 2025 report, nearly three in four B2B marketers relied on email newsletters as a lead nurturing channel over the previous 12-month period, making it one of the highest-adoption tactics in the B2B playbook.
Half of U.S. B2B marketers rank email above social media, content marketing, and paid channels when measuring multichannel impact. This makes email the clear centerpiece of professional marketing stacks, not just one channel among many.
A Sagefrog survey found that email marketing leads all other B2B marketing tactics by adoption rate, with social media, blogging, and SEO all trailing behind. This reinforces email as the default starting point for B2B marketers building or expanding their programs.
NetLine's 2023 State of B2B Content Consumption and Demand Report recorded a 307% spike in year-over-year newsletter registrations, indicating that demand for email newsletters from B2B buyers, not just from marketers, surged sharply heading into 2024.
All statistics on this page are sourced from the following 35 references.
All statistics on this page are sourced from the following 35 references.
See real GPT and AI SaaS email examples that drive signups and revenue. Proven templates, subject lines, and strategies for SaaS growth.
See real GPT and AI SaaS email examples that drive signups and revenue. Proven templates, subject lines, and strategies for SaaS growth.
Constant Contact's January 2024 industry benchmark table, covering both B2B and B2C businesses, put the all-industry average open rate at 39.7% with a click-through rate of just 1.0%. The wide gap between open rate and CTR highlights why relying on opens alone overstates actual engagement, especially in a post-MPP measurement environment.
GetResponse benchmarks show welcome emails dramatically outperform standard campaigns, with a CTOR of 19.85% and a relatively low unsubscribe rate of 0.94%. Because welcome emails arrive at the highest moment of subscriber intent, they set engagement expectations for everything that follows and should be treated as the highest-priority email in any automation sequence.
GetResponse data shows behavior-triggered automated emails consistently outperform broadcast newsletters on open rate, click-through rate, and CTOR. The performance gap reflects relevance: triggered emails reach subscribers in the context of a specific action they just took, making them far more likely to engage.
With Apple Mail holding nearly half of all email client market share, Apple Mail Privacy Protection now affects the majority of open-rate reporting across the industry. The DMA's Email Benchmarking Report 2023 also documented this effect, recording a spike in reported open rates from 19% in 2021 to 31.83% in 2022 in the first full year after MPP launched.
GetResponse benchmarks show a clear click-through rate advantage for triggered campaigns over standard newsletters, a gap driven by timing and relevance. For marketers looking to improve CTR without rebuilding their entire content strategy, adding even basic behavioral triggers to an existing newsletter program is one of the most direct levers available.
Email's ability to shape buying intent is well-documented. Over 50% of those consumers also report purchasing from a marketing email at least once a month, making email one of the most consistent revenue-driving channels available to marketers.
Constant Contact's January 2024 industry benchmark table, covering both B2B and B2C businesses, put the all-industry average open rate at 39.7% with a click-through rate of just 1.0%. The wide gap between open rate and CTR highlights why relying on opens alone overstates actual engagement, especially in a post-MPP measurement environment.
GetResponse benchmarks show welcome emails dramatically outperform standard campaigns, with a CTOR of 19.85% and a relatively low unsubscribe rate of 0.94%. Because welcome emails arrive at the highest moment of subscriber intent, they set engagement expectations for everything that follows and should be treated as the highest-priority email in any automation sequence.
GetResponse data shows behavior-triggered automated emails consistently outperform broadcast newsletters on open rate, click-through rate, and CTOR. The performance gap reflects relevance: triggered emails reach subscribers in the context of a specific action they just took, making them far more likely to engage.
With Apple Mail holding nearly half of all email client market share, Apple Mail Privacy Protection now affects the majority of open-rate reporting across the industry. The DMA's Email Benchmarking Report 2023 also documented this effect, recording a spike in reported open rates from 19% in 2021 to 31.83% in 2022 in the first full year after MPP launched.
GetResponse benchmarks show a clear click-through rate advantage for triggered campaigns over standard newsletters, a gap driven by timing and relevance. For marketers looking to improve CTR without rebuilding their entire content strategy, adding even basic behavioral triggers to an existing newsletter program is one of the most direct levers available.
Email's ability to shape buying intent is well-documented. Over 50% of those consumers also report purchasing from a marketing email at least once a month, making email one of the most consistent revenue-driving channels available to marketers.
Send frequency directly correlates with returns, up to a point. This frequency bracket, roughly two to four emails per week, balances engagement with list fatigue. Brands sending fewer than 5 emails per month consistently leave revenue on the table.
Batch-and-blast campaigns generate a fraction of what segmented, personalized sends do. Sending the right message to the right segment is not a nice-to-have; it determines the majority of revenue the channel produces.
Hyper-personalization goes beyond first-name merge tags. It uses real-time behavioral data to adjust content, offers, and timing for each individual subscriber. Businesses that have integrated AI into their personalization saw a 41% increase in click-through rates and a 20% increase in conversions.
Audience segmentation is consistently one of the highest-leverage moves in email marketing. When combined with AI-driven personalization, the revenue gap between targeted and generic sends widens further. Campaign Monitor and multiple industry benchmarks confirm this figure holds across diverse industries and list sizes.
Litmus's 2024 State of Email in Lifecycle Marketing report highlights a sharp generational divide in personalization expectations. Younger subscribers not only demand more relevant email experiences but are also significantly more willing to share data to receive them, with 51% of Gen Z comfortable doing so versus just 20% of boomers.
The tightening of Gmail and Yahoo bulk sender requirements in 2024, combined with Microsoft's stricter filtering and Apple Intelligence's inbox categorization, has made inbox placement harder to maintain across providers. Senders who relied on volume alone are feeling this shift most acutely.
Send frequency directly correlates with returns, up to a point. This frequency bracket, roughly two to four emails per week, balances engagement with list fatigue. Brands sending fewer than 5 emails per month consistently leave revenue on the table.
Batch-and-blast campaigns generate a fraction of what segmented, personalized sends do. Sending the right message to the right segment is not a nice-to-have; it determines the majority of revenue the channel produces.
Hyper-personalization goes beyond first-name merge tags. It uses real-time behavioral data to adjust content, offers, and timing for each individual subscriber. Businesses that have integrated AI into their personalization saw a 41% increase in click-through rates and a 20% increase in conversions.
Audience segmentation is consistently one of the highest-leverage moves in email marketing. When combined with AI-driven personalization, the revenue gap between targeted and generic sends widens further. Campaign Monitor and multiple industry benchmarks confirm this figure holds across diverse industries and list sizes.
Litmus's 2024 State of Email in Lifecycle Marketing report highlights a sharp generational divide in personalization expectations. Younger subscribers not only demand more relevant email experiences but are also significantly more willing to share data to receive them, with 51% of Gen Z comfortable doing so versus just 20% of boomers.
The tightening of Gmail and Yahoo bulk sender requirements in 2024, combined with Microsoft's stricter filtering and Apple Intelligence's inbox categorization, has made inbox placement harder to maintain across providers. Senders who relied on volume alone are feeling this shift most acutely.
