Email Open Rates Explained (Benchmarks, CTOR vs CTR, & How to Improve)

Email marketing delivers an outsized return compared to almost every other digital channel, but gauging whether your campaigns are performing well requires more than a single metric. Open rates get the most attention because they're the first metric you see after a send, but they've also become the most misunderstood. Apple's Mail Privacy Protection, which automatically preloads email content for Apple Mail users regardless of whether they actually read the message, has inflated open-rate data across the industry and made the metric far less reliable than it was a few years ago.

That doesn't mean open rates are useless. It means they need context. Understanding what a good open rate looks like for your industry, how the average email marketing open rate has shifted in recent years, and why metrics like click-to-open rate and click-through rate tell a more complete story gives you the foundation to evaluate your campaigns with actual precision instead of guesswork.

This guide breaks down current benchmarks, explains the difference between click-to-open rate vs click-through rate, and helps you figure out which numbers your team should actually optimize around.

• Email open rates vary widely by industry, audience, and list quality. Benchmarks can be useful for comparison, but privacy features have made open-rate tracking less reliable than it once was.
• Strong open rates are typically a sign of relevant content, effective subject lines, and a healthy sender reputation, though performance should always be evaluated within the context of your specific audience.
• Click-to-open rate measures engagement among people who actually opened your email, while click-through rate measures engagement across all delivered emails, and each diagnoses different problems.
• Click-through rate is the most reliable engagement metric in a post-MPP world because it requires a deliberate action that can't be faked by privacy software.

A recent analysis of over 3.6 million email campaigns found that the average open rate reached 43.46% in 2025, up from 42.35% the previous year. While benchmarks like these can provide useful context, email open rates vary significantly based on factors such as industry, audience, list quality, and sending frequency.

It's also important to remember that privacy features and changes in email tracking technology have made open rates less precise than they once were. For that reason, marketers should use benchmark data as a general reference point rather than a strict performance target. In most cases, tracking trends over time and comparing results against similar campaigns provides a more accurate picture of email marketing performance.

Benchmarks vary significantly by industry, which is why a single "good" open rate can be misleading without context. Organizations with highly engaged audiences, such as government agencies, educational institutions, and nonprofits, often see stronger engagement because recipients are more likely to view their communications as relevant, timely, or important.

Technology companies, SaaS, and B2B services businesses can also achieve strong open rates when their email lists are well-segmented and their content addresses specific audience needs. Engagement levels often depend on factors such as audience quality, content relevance, sending frequency, and overall sender reputation.

Retail and e-commerce brands typically face different challenges. Because they send a higher volume of promotional messages, individual campaigns may generate lower engagement than less frequent, value-driven communications. This does not necessarily indicate poor performance but rather reflects differences in audience expectations and email strategy.

Instead of focusing on a universal benchmark, compare performance against your own historical results, similar organizations in your industry, and the type of campaign being evaluated. A welcome email series will generally outperform a monthly newsletter, while a targeted newsletter will often outperform a broad promotional campaign. Looking at performance within the proper context provides a much clearer picture of success than relying on a single benchmark number.

These two metrics sound similar but measure fundamentally different things, and confusing them leads to misdiagnoses that waste optimization effort. Understanding click-to-open rate vs click through rate is essential for any marketing team that wants to improve email performance systematically.

Click-Through Rate (CTR)

Click-through rate measures the percentage of all delivered emails that received at least one click. The formula is straightforward: unique clicks divided by total emails delivered, multiplied by 100. If you send 10,000 emails and 250 people click a link, your CTR is 2.5%.

CTR reflects the performance of your entire email funnel, from deliverability to subject line to content to call-to-action. A low CTR could mean any of those stages is underperforming. The average CTR across industries sits around 2% to 3%, though this varies by campaign type and audience.

The strength of CTR is that it's not affected by Apple's Mail Privacy Protection. A click requires a deliberate human action, which makes it the most trustworthy engagement signal available in email marketing today. If you're forced to choose a single metric to evaluate campaign performance, CTR is the most defensible choice.

Click-to-Open Rate (CTOR)

Click-to-open rate measures the percentage of people who opened your email and then clicked a link. The formula is unique clicks divided by unique opens, multiplied by 100. If 2,000 people open your email and 200 of them click, your CTOR is 10%.

CTOR isolates the performance of your email content from the performance of your subject line and deliverability. A high CTOR means that once people opened the email, they found the content compelling enough to act on. A low CTOR with a high open rate suggests that your subject lines are doing their job, but the email body or call-to-action is falling flat.

The average CTOR across industries is roughly 7% to 11%, depending on the source and industry. MailerLite's 2025 data puts the cross-industry average at 6.81%.

Which Metric Should You Prioritize?

The honest answer is both, but with awareness of what each one tells you. CTR gives you the most reliable picture of overall campaign performance and is the safer metric to build KPIs around in a post-MPP world. CTOR gives you a more targeted diagnostic signal about your email content, but its reliability depends on the accuracy of your open rate data, which MPP has compromised.

The most useful practice is to track both metrics side by side and use the relationship between them to diagnose issues. A low CTR paired with a high CTOR suggests that your content is strong, but your emails aren't reaching enough inboxes or your subject lines aren't generating enough opens. A high open rate with a low CTOR points to a content or CTA problem rather than a deliverability or subject line problem.

A good click-to-open rate depends on your industry, email type, and the action you're asking readers to take. As a general benchmark, a CTOR above 10% is considered strong across most industries. Between 7% and 10% is average. Below 5% signals that the email content or CTA needs work.

Transactional and triggered emails, such as order confirmations, abandoned cart reminders, and welcome sequences, tend to see higher CTORs because the recipient has clear context and motivation for engaging. Broadcast campaigns sent to broad segments typically see lower CTORs because the content is less personalized.

Several factors influence your CTOR beyond the quality of the email itself. The number and placement of links in the email matter. An email with a single prominent CTA will often generate a different CTOR than one with five links scattered throughout the body. The alignment between the subject line's promise and the email's content also plays a role. If the subject line sets an expectation that the email doesn't deliver on, people open but don't click.

To improve your CTOR, focus on making the value proposition of clicking immediately clear. What does the reader get on the other side of that link? If the answer isn't obvious within the first few seconds of scanning the email, the click won't happen.

Understanding benchmarks is useful, but the real value comes from knowing what levers to pull when your numbers aren't where you want them to be.

If Your Open Rate Is Low

Low open rates point to one of three issues: deliverability, sender reputation, or subject line performance. Start with deliverability by checking whether your domain authentication (SPF, DKIM, DMARC) is properly configured and whether your sending IP has any blacklist flags. Next, review your list hygiene. A list with a high percentage of inactive subscribers, bounced addresses, or spam traps drags down your sender reputation, which pushes more of your emails into spam folders.

If deliverability is clean, the problem is likely your subject lines. Test different approaches: questions versus statements, specific numbers versus curiosity gaps, personalization versus broad appeal. A/B testing subject lines on a small segment before sending to your full list is one of the highest-ROI habits a marketing team can adopt.

If Your CTR Is Low

A low click-through rate with a healthy open rate means people are reading your email but not taking action. This usually comes down to the clarity and relevance of your call-to-action. Is the CTA visible without scrolling? Does it clearly state what the reader will get by clicking? Is it relevant to the specific audience segment receiving the email?

Email design also plays a role. Dense, text-heavy emails with buried links consistently underperform emails with clear visual hierarchy and a prominent CTA. You don't need to be a designer to fix this. Simply moving your primary link higher in the email, using a button instead of a text link, and reducing the amount of content between the opening line and the CTA can produce measurable improvements.

If Your CTOR Is Low

A low click-to-open rate specifically means the content isn't converting people who have already opened the email. This is the most targeted signal you have, and it points directly to the body copy, the offer, or the CTA.

Review whether the email delivers on the promise made by the subject line. Check whether the offer or content is genuinely valuable to the segment receiving it. And evaluate whether you're asking for too much commitment in the CTA. A click is a small ask, but if the landing page requires registration, a form fill, or a purchase, the perceived effort may be keeping people from clicking.

Metrics are only useful if your team reviews them regularly and acts on what they find. A marketing team that checks email performance once a month is operating in the dark between campaigns. A team that reviews results within 48 hours of every send and discusses findings together catches patterns before they become entrenched.

For distributed marketing teams, the reporting discussion is often where collaboration breaks down. The data lives in one platform, the analysis happens in someone's head, and the insights get shared in a Slack thread that half the team doesn't read. Teams working in Kumospace can turn a quick metrics review into a live conversation, pulling up the data, walking through the results, and making decisions about what to test next in a single session rather than spreading the discussion across a week of async messages.

Build a lightweight reporting rhythm that includes open rate, CTR, and CTOR for every campaign. Track trends over time rather than fixating on individual sends. Compare results across segments, content types, and send times. And make the reporting conversation collaborative rather than top-down, because the person writing the emails often has the most useful hypotheses about why a specific metric moved.

Improving email marketing performance is rarely the responsibility of one person. Marketers, content creators, designers, and leadership teams all contribute to campaign results, which makes collaboration essential when reviewing metrics and planning future sends.

Kumospace helps distributed teams discuss campaign performance in real time through its Virtual Office environment. Instead of stretching performance reviews across long email threads or scattered chat messages, teams can quickly gather to review open rates, click-through rates, audience segments, and campaign results together.

With Spatial Audio, team members can move naturally between conversations, making it easy to brainstorm subject line tests, discuss audience targeting, or review campaign insights without interrupting unrelated work. Video Conferencing supports deeper strategy sessions, helping teams align on what worked, what didn't, and what to test next.

By making communication more immediate and collaborative, Kumospace helps marketing teams turn email performance data into faster decisions, stronger campaigns, and a more consistent optimization process.

Email open rates remain a useful benchmark, but privacy features like Apple's Mail Privacy Protection have made them less reliable as a standalone measure of success. Rather than focusing on a single number, marketers should compare performance against their own historical results, audience, and campaign type.

Click-through rate (CTR) is now the most reliable email marketing metric because it measures deliberate engagement through clicks. Click-to-open rate (CTOR) provides additional insight by showing how effectively email content converts opens into actions. Together, these metrics help identify whether issues stem from subject lines, deliverability, content, or calls to action.

The most effective teams track open rates, CTR, and CTOR together, review results consistently, and use those insights to improve future campaigns. For distributed teams, tools like Kumospace make it easier to discuss performance, share findings, and make faster optimization decisions through real-time collaboration.