Plain Text Emails in Klaviyo: When to Skip the Design

I'm going to tell you something that goes against every email marketing playbook you've ever read: some of your highest-performing emails should have zero design.

No hero image. No branded header. No product grid. No colorful CTA button. Just text. Like an email your friend would send you.

We run a test every few months for our Klaviyo clients where we send a plain text version of a campaign alongside the designed version. And consistently — not every time, but more often than you'd expect — the plain text version wins. Higher open rates. Higher reply rates. Higher click rates. Sometimes by 20-30%.

Why? Because plain text emails don't look like marketing. They look like personal communication. And in a world where the average consumer receives 120+ emails per day and has become blind to anything that looks like a promotion, looking like a real person writing a real email is a massive advantage.

Why Plain Text Emails Work

They bypass the "ad blindness" filter. Your subscribers have trained their brains to identify and ignore marketing emails. Branded headers, product grids, and designed layouts are all signals that scream "this is an ad." A plain text email sneaks past that mental filter because it looks like every other non-commercial email in their inbox.

They feel personal. When someone reads a plain text email from a brand, it feels like the founder or a team member sat down and wrote them a message. That feeling of personal attention creates engagement that templated emails can't match.

They're mobile-friendly by default. No responsive design issues. No images that don't load. No layouts that break. Plain text looks perfect on every device, every email client, every screen size. Always.

They're deliverability-friendly. Email providers like Gmail look at the HTML-to-text ratio of emails. Heavily designed emails with minimal text content can trigger spam filtering. Plain text emails are pure text content — the ratio is perfect by definition.

They drive replies. Replies are the strongest positive signal you can send to email providers. When subscribers reply to your emails, Gmail and others interpret your future emails as "wanted" and prioritize them in the inbox. Plain text emails get 3-5x more replies than designed emails because they feel reply-worthy.

When to Use Plain Text

Plain text isn't appropriate for every email. Here's when it works best:

Founder updates and personal messages. If the email is from the founder's perspective — sharing news, thanking customers, sharing a story — plain text feels natural. Nobody designs a personal letter.

Important announcements. When you have genuinely important news (policy change, product recall, major update), plain text signals seriousness. A designed email might look like just another promo. A plain text email says "read this, it matters."

Winback and re-engagement. When you're trying to reconnect with lapsed customers, a plain text email that says "Hey, noticed you haven't been around. Everything okay?" feels caring instead of salesy. It's the digital equivalent of a friend checking in.

VIP and high-value customer communication. Your best customers deserve personal attention. A plain text email to your top 100 spenders feels exclusive and intimate. "I wanted to reach out personally because you've been incredible for our brand..."

Flash sale announcements. Counterintuitive, but a plain text email that says "Hey, dropping our prices by 30% for the next 24 hours. Wanted you to hear about it first: [link]" can outperform a designed announcement because it feels urgent and exclusive rather than polished and corporate.

Deliverability repair. If your deliverability has taken a hit (low open rates, landing in spam), sending a few plain text emails to your most engaged segment can help repair your sender reputation. The high engagement signals (opens, clicks, replies) tell ISPs your emails are wanted.

When to Stick With Designed Emails

Plain text doesn't replace designed emails. It complements them. Keep your designed templates for:

• Product launches (visual product showcase is essential)
• Promotional campaigns (sale details, product grids, branded visuals)
• Post-purchase flows (order confirmations need structure)
• Content emails (blog posts need images to be engaging)
• Welcome series (first impression should be branded)

The ideal mix: 70-80% designed emails, 20-30% plain text. Enough plain text to get the benefits without losing your brand identity.

How to Write Effective Plain Text Emails

Plain text emails need to compensate for the lack of visual elements with stronger writing. Here's the formula:

Subject line: Lowercase, casual, intriguing. Designed emails can get away with generic subject lines because the visual layout does some of the selling. Plain text emails need subject lines that earn the open through curiosity or relevance.

Good: "quick question for you" Good: "something I've been working on" Good: "you were right about this" Bad: "HUGE SALE - 30% OFF EVERYTHING" Bad: "[Brand Name] Newsletter - March Edition"

The subject line should look like something a real person would write to someone they know.

Opening: Personal and immediate. Skip the greeting. Don't start with "Dear [First Name]." Start with a statement or question that pulls them in.

"I was thinking about you the other day." "So I made a mistake last week." "Remember that thing I mentioned about our new product?"

Body: Short paragraphs, conversational tone. Write like you talk. One to three sentences per paragraph. Use line breaks generously. Let the email breathe.

Avoid:

• Formal language ("We are pleased to announce...")
• Marketing speak ("Revolutionary new formula")
• Long paragraphs (anything over 3 lines on mobile)
• Bullet points with more than 3 items

Link placement: Natural and limited. In a plain text email, your link should appear naturally within the text, like you'd include a link in a message to a friend.

"I put the details here: [link]" "Here's the page if you want to check it out: [link]"

One, maybe two links per email. Not five. Not a footer full of links. Just the one thing you want them to click.

Closing: Warm and personal. Sign off like a real person. Use the founder's name or a team member's name. Include a P.S. — studies consistently show that P.S. lines in text emails have extremely high read rates.

"Talk soon, Mark

P.S. If you reply to this email, I actually read every response."

Setting Up Plain Text in Klaviyo

Technically, even "plain text" emails in Klaviyo are HTML — they're just styled to look like plain text. Here's how to set them up:

Method 1: Single text block template. Create a new email in Klaviyo. Delete all blocks except one. Add a single text block with no formatting. No images, no buttons, no dividers. Just text.

Set the font to a system font (Arial, Helvetica, or Georgia) at 14-16px. Use a single-column layout with generous padding. Set the background to white. Remove the header and footer branding (or keep it minimal — just an unsubscribe link at the bottom).

Method 2: Plain text content type. When creating an email in Klaviyo, you can choose "Text Only" as your content type. This strips out most formatting options and gives you a clean text editor.

The "From" name matters even more. For plain text emails, send from a person's name, not a brand name. "Mark from GOSH Digital" or just "Mark" feels more personal than "GOSH Digital Team." In Klaviyo, you can set the sender name per email or per flow.

A/B Testing Plain Text vs. Designed

Before committing to a plain text strategy, test it with your audience:

Test setup:

• Version A: Your normal designed campaign
• Version B: The same message rewritten as a plain text email
• Split: 50/50 or 20% test with 80% winner

What to measure:

• Open rate (subject lines should be different, optimized for each format)
• Click rate (the real indicator of engagement)
• Reply rate (plain text advantage)
• Revenue per recipient (the bottom line)
• Unsubscribe rate (make sure plain text doesn't feel like spam)

What we typically see:

| Metric | Designed Email | Plain Text Email | |---|---|---| | Open Rate | 22-28% | 28-35% | | Click Rate | 2.5-3.5% | 3.0-5.0% | | Reply Rate | 0.1-0.3% | 1.0-3.0% | | Unsubscribe Rate | 0.1-0.3% | 0.05-0.15% |

The open rate lift comes from subject line style (casual, personal subject lines outperform promotional ones). The click rate lift comes from the personal feel driving higher engagement. The reply rate is where plain text really shines.

The Hybrid Approach

The most effective strategy isn't pure plain text or pure designed. It's alternating between them strategically.

Here's a sample monthly calendar:

• Week 1, Tuesday: Designed promotional campaign (new product)
• Week 1, Thursday: Designed content campaign (blog post feature)
• Week 2, Tuesday: Plain text from founder (personal update, story)
• Week 2, Thursday: Designed promotional campaign (bestsellers)
• Week 3, Tuesday: Designed content campaign (how-to guide)
• Week 3, Thursday: Plain text (exclusive offer for loyal subscribers)
• Week 4, Tuesday: Designed promotional campaign (seasonal)
• Week 4, Thursday: Plain text (reflection, question, conversation starter)

Two plain text emails per month, mixed in with your regular designed sends. Enough to get the deliverability and engagement benefits without your subscribers forgetting what your brand looks like.

Plain Text in Flows

Certain flow emails benefit enormously from plain text format:

Welcome flow email 3 or 4. After the first couple of branded welcome emails, drop in a plain text personal note from the founder. "Hey [Name], wanted to check in personally. Did you get a chance to browse the site? Anything I can help you find?"

Winback flow email 2. The first winback email can be designed (showing new products they've missed). The second should be plain text: "Hey, noticed you haven't been around. Is there something we could be doing better?"

Post-purchase flow email 3-4. After the branded order confirmation and shipping updates, send a plain text check-in: "How's the [product]? Would love to hear what you think."

VIP flow. When a customer hits VIP status, a plain text congratulations from the founder feels more meaningful than a designed "You're a VIP!" banner.

The key insight: plain text emails work best when they represent a human reaching out, not a brand sending a notification. Use them at moments in the customer journey where personal attention makes sense.

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