Klaviyo Plain Text Emails 2026: When Text Only Wins

Direct answer: Use a plain text email in Klaviyo when a person should be talking, not a brand. Founder notes, apologies, winbacks, VIP check-ins, and inbox repair. Keep designed templates for launches, product grids, and the first welcome emails.

Klaviyo's name for this is Text only. That is a content type in the campaign and flow editors. It is not the auto-generated plain text version of an HTML email. Two different tools. People mix them up constantly.

This is the operator version: when to use it, how to set it up, how to write it, and when design still wins.

When should you use a plain text email?

Use Text only when the job is "a human reached out." Skip it when the job is "show the product."

Use it for:

• Founder updates and personal notes
• Apologies and "we messed this up" messages
• Winback and re-engagement, especially the check-in email
• VIP or high-LTV outreach
• Policy or operations news that should not look like a promo
• Inbox repair after a deliverability slide, sent to people who already engage

Keep design for:

• Product launches and lookbooks
• Sale emails with a grid, a code, and a clock
• Order, shipping, and most post-purchase receipts
• Welcome email 1, the branded first impression

Klaviyo's help center calls out the same pattern: welcome notes, apologies, and long text-heavy messages. They also note that text-only emails often see higher click rates than fully designed HTML. That is their wording, not a benchmark I am handing you as a target.

There is no universal mix. I do not run a 70/30 rule. Some brands need one founder note a month. Some need a Text only step in three flows and almost never in campaigns. Look at the moment, not a percentage.

A flash sale can go either way. A designed blast shows the merch. A short note from a person ("prices drop until midnight, here is the link") can feel like a tip. Test that one. Do not guess from a blog table.

How do you send a plain text email in Klaviyo?

Two paths. Do not confuse them.

Path 1: send a Text only email (what you want)

Klaviyo documents this in How to create a text-only email. Labels move. If you do not see the exact words, look for Text only or Switch to text only editor.

Campaign

1. Go to Campaigns, then Create campaign.
2. Name it, choose Single channel, then Email.
3. Pick recipients and tracking, then continue to the message step.
4. Set the subject and the sender.
5. Open the three-dot template menu and choose Switch to text only editor.

Flow

1. Open the flow (or create one) and drag in an Email action.
2. Open the message's three-dot menu and choose Edit.
3. Select Text only.

To replace an existing flow email, use Change template, then Text only. That wipes the old content. Copy anything you need first.

In the editor you can still add personalization tags, a short list, and even an image. If you add a hero, a logo, and a button, you just built a designed email with extra steps. Keep it looking like a note.

Klaviyo's size cap for text-only emails is 1.05 MB. Preview to your own inbox before you send. Saving does not send the campaign or turn the flow on.

From name: use a person. "Mark from [Brand]" or the founder's first name. "The [Brand] Team" kills the effect.

You still need an unsubscribe link. Text only is not a loophole. Klaviyo will append one if you forget, but put it in yourself so the note does not grow a branded footer.

Path 2: edit the plain text version of a designed email

Every drag-and-drop email also ships a plain text MIME version. Klaviyo builds it automatically. That is for inboxes that strip HTML, screen readers, and some security setups. It is not a "send as plain text" toggle.

Klaviyo documents this in How to edit the plain text version of an HTML email. On the message, open the three-dot menu and choose Edit plain text version. If you edit it by hand, Klaviyo stops syncing it to the HTML. You then maintain two copies.

If you only wanted a note that looks like Gmail from your cousin, you want Path 1.

If your email program is all designed templates and you are not sure where a Text only send would pay, book a program check. We will point at the two or three spots worth testing, not a full redesign.

How do you write a Klaviyo plain text email?

Write it like a person with one job. Not a brand with a layout.

Subject. Lowercase, short, specific. "quick question" and "you were right about this" get opened because they look like a person. "HUGE SALE, 30% OFF EVERYTHING" tells the inbox this is a promo, then the body pretends it is not.

From and preview. A person's name. Preview text that continues the sentence, or none. Do not stuff a second headline in there.

Open. Skip "Dear First Name." Start with the point.

"I owe you an update on last week's delay."

"You have not ordered in a while and I wanted to ask why, not pitch you."

Body. One to three sentences per paragraph. Line breaks. Talk like you talk. No "we are pleased to announce." No five-link footer farm.

Links. One, maybe two, sitting in the sentence. "Details are here: [url]." If you need a grid of SKUs, you needed a designed email.

Close. A real name. A P.S. if you have one extra beat. "Reply to this, a person reads it" only if that is true.

Draft it in Notes first. If it sounds like a landing page, it will look like one even without a hero.

Designed vs plain text: which should you send?

Ask what the email has to do.

Job	Send
Show product, colorways, or a look	Designed
Explain a sale with a code and rules	Designed
First welcome, brand impression	Designed
Founder story, thank you, or check-in	Text only
Apology or operations news	Text only
Winback that asks a question	Text only
Repair inbox placement with engaged people	Text only, then watch replies

I have seen Text only win opens when the subject and from name look personal. I have seen it lose revenue when the email needed a product shot and we hid the merch. I have seen replies show up more often, which is useful for Gmail. None of that is a published band you should paste into a QBR.

If you want a number, run a split on your list. Same offer, two formats. Score revenue per recipient, clicks, replies, and unsubscribes. Opens alone will lie if the subjects are different, and they should be.

Do not A/B a designed promo against a Text only "hey" and call it a format test. You tested two different emails.

Should you use plain text in Klaviyo flows?

Yes, in the emails that should feel like a person checked in. Not in the emails that confirm an order or show a cart.

Welcome. Keep email 1 branded. Later in the series, a founder note ("did you find what you needed?") is a good Text only slot.

Winback. Email 1 can show what they missed. The check-in ("still looking, or did we lose you?") should look like a person. Walk through the full sequence in the winback flow guide.

Post-purchase. Receipts stay structured. A later "how is it going?" can be Text only.

VIP. Hitting a tier with a designed badge is fine. A note from the founder is better as Text only.

Sunset. A last-chance "should we keep emailing you?" reads cleaner as a note than a branded breakup.

If your flows are all the same template with the first name swapped, you are broadcasting inside automation. Text only is how you break that without rebuilding the whole account.

Related Reads

• Your Klaviyo Emails Are Going to Spam. Here's How to Fix It.
• Win-Back Flows: Reactivate Lapsed Customers in Klaviyo
• Email and SMS marketing for ecommerce
• Klaviyo Gold Partner agency

GOSH Digital is a Klaviyo Gold Partner. Email and SMS from $1,500/mo. See /pricing.

If you want a second pair of eyes on where Text only belongs in your program, book a call.