Plain Text Vs Designed Emails - Which Actually Performs Better

When it comes to email marketing, one of the most debated questions among marketers and business owners is whether plain text emails or beautifully designed HTML emails actually perform better. On the surface, it seems obvious that a polished, branded email with images, buttons and a clean layout would win every time. The reality, however, is considerably more nuanced than that, and understanding the difference between the two approaches could genuinely transform how your audience responds to your messages.

This is not a case where one format is universally superior to the other. The answer depends heavily on your audience, your goals, your industry and the type of relationship you are trying to build. What matters is that you make an informed decision rather than simply defaulting to whatever your email platform's template library offers you first.

What We Mean By Plain Text and Designed Emails

Before diving into the performance question, it is worth being clear about what each format actually involves. A plain text email is exactly what it sounds like: no images, no branded headers, no colourful call-to-action buttons. Just words on a screen, formatted the way a personal email from a colleague or friend might look. A designed email, by contrast, uses HTML to incorporate brand colours, imagery, structured layouts, logo placement and styled typography. These are the emails that tend to look like a proper marketing communication from a business.

Both have legitimate uses, and both have clear advantages depending on the context in which they are deployed. The mistake many marketers make is treating this as a one-size-fits-all decision.

The Case for Designed HTML Emails

Designed emails are the default choice for most brands, and for good reason. When you are running a promotional campaign, launching a new product or sharing a seasonal offer, visual design does a lot of the heavy lifting. A well-constructed HTML email allows you to guide the reader's eye, reinforce your brand identity and make key information easy to digest at a glance.

E-commerce businesses, in particular, benefit enormously from designed emails. If you are showcasing products from a retailer like Shopify-powered stores or sending order confirmations and abandoned cart reminders, the visual format simply makes more sense. Readers expect to see product images, pricing and a prominent button to click. Stripping that back to plain text would likely confuse rather than convert.

Designed emails also give you far greater control over your brand's voice and appearance. Consistent use of colours, fonts and layout builds recognition over time, so that recipients begin to associate the visual style with your business before they have even read a single word.

The Case for Plain Text Emails

Plain text emails carry a quality that no amount of design can manufacture: they feel personal. When someone receives a plain text email, the instinctive reaction is that a real person wrote it specifically for them. That feeling of one-to-one communication is incredibly powerful, particularly in sectors built on trust and relationship.

Consultants, coaches, agencies and professional service providers often find that plain text emails generate stronger engagement precisely because they do not look like marketing. A message that reads like a genuine note from someone who knows your situation tends to get read, replied to and acted upon in ways that a heavily designed newsletter simply does not.

There is also a deliverability dimension worth considering. HTML emails, particularly those with many images and complex code, are more likely to trigger spam filters. Plain text emails, being simpler and lighter, tend to land in the inbox more reliably. Tools like Mailchimp and Klaviyo both offer plain text options alongside their HTML builders, and it is worth testing both if deliverability is a concern for your list.

How Open Rates and Click Rates Are Affected

Open rates tell you one thing, and click rates tell you quite another. Plain text emails frequently see stronger open rates in specific contexts, particularly when the sender name and subject line feel personal. A subject line that reads like it came from a colleague rather than a brand can make all the difference in a crowded inbox.

Click rates, however, often favour designed emails when the goal is to drive traffic to a product page, a blog post or a landing page. The reason is straightforward: a styled button is easier to interact with than a raw URL embedded in a block of text. Visual hierarchy in a designed email naturally draws the eye to the action you want the reader to take.

The sensible approach is not to assume one format wins on all metrics. Instead, consider what you are measuring and why, and let that guide your format choice before you write a single word.

The Audience Factor

Your audience should be the starting point for every email format decision. A B2B audience receiving a sales outreach or a consultative update will respond very differently to that communication than a B2C audience shopping for fashion or homeware. Sending a glossy HTML email to a senior decision-maker who reads emails on their phone between meetings is unlikely to have the impact you are hoping for. Equally, sending a plain text promotional email to a fashion-forward consumer audience misses the opportunity to showcase the product visually.

Segmentation is your friend here. If your list contains both types of recipient, consider tailoring your format to different segments rather than applying a blanket approach across the board.

Testing Is the Only Way to Know for Certain

The honest answer to the plain text versus designed email debate is that your own data will give you better answers than any general guidance. A/B testing the two formats against the same audience, with the same message and subject line, will reveal what your specific subscribers actually respond to. Platforms like ActiveCampaign make this kind of split testing straightforward to set up and analyse.

Run the test properly, give it enough time to gather meaningful data and look beyond open rates alone. Consider reply rates, click-through rates, unsubscribe rates and, ultimately, conversions. Those are the numbers that tell the full story.

Choosing the Right Format for the Right Moment

Rather than picking a single format and committing to it indefinitely, the most effective email marketers treat the format as a strategic tool. Designed emails work brilliantly for product launches, newsletters, event promotions and anything where visual presentation adds genuine value. Plain text emails work brilliantly for personal outreach, follow-up sequences, thought leadership messages and communications where the relationship matters more than the brand aesthetic.

Neither plain text nor designed emails are inherently superior. What matters is that you are choosing deliberately, testing consistently and always keeping your audience's expectations at the centre of every decision you make. That is what separates email marketing that genuinely performs from email marketing that simply exists.