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Klaviyo's New AI Agent Builds Your Email Campaigns for You

· 6 min read
WebDialogAI Team

If you've ever tried to build a multi-step email flow from scratch — you know how it goes. You open the flow builder with good intentions, get halfway through the branching logic, realize you need to create a new segment first, and forty-five minutes later you still don't have anything live.

Email automation is one of those things that almost every store should have more of, and almost every store doesn't — not because it's complicated in theory, but because it takes a long time to build in practice.

On March 24, Klaviyo launched Composer, an AI agent that takes a plain-language prompt and assembles a complete campaign for you — segments, email copy, SMS messaging, multi-step flows, all of it. Here's what it actually does and whether it's worth your attention this week.

What Composer Does​

Composer is a new AI interface inside Klaviyo. You describe what you want the way you'd explain it to a new hire: "build me a re-engagement campaign for customers who haven't bought in 90 days" or "make a spring sale announcement for everyone who's ordered from us in the last year."

Composer then assembles:

  • Email messages: subject line, preview text, body copy, images, and CTA
  • SMS messages: with formatting appropriate for text, not newsletter
  • Audience segments: built from your plain-language description, not the segment builder
  • Multi-step flows: the automated sequences that can take days to build manually

Nothing goes live until you review and approve it. You can edit anything it generates before it touches a single customer. It's not replacing you — it's doing the setup work so you can focus on refinement.

Currently works across email and SMS. Mobile push and WhatsApp support are coming next.

Why This Is Different From What You've Tried Before​

If you've used AI tools for content — ChatGPT to draft a product description, a tool to suggest a subject line — you know the pattern: it gives you a rough draft, you clean it up, and the time savings are real but modest.

Composer is going after a different problem. The bottleneck in email marketing for most small stores isn't usually the copy. It's the orchestration: knowing which customers to target, building the right segment, sequencing the steps in a flow, making sure the email version and SMS version don't feel like two separate campaigns from two separate people. That's the work that takes a full afternoon and gets pushed to next week.

Klaviyo is claiming that structural work can now happen in minutes. That's the specific claim worth testing.

Where the Numbers Are Coming From​

About 54% of small business owners are already using AI marketing tools in 2026, and marketing is the top AI use case among SMBs — ahead of operations and customer service. But most of that use is narrow: one-off content generation, an image resizer, an ad copy plugin. Tool-by-tool.

What Klaviyo is building is closer to a marketing co-pilot: something that handles multi-step setup, not just individual pieces. And the need is real. Most Shopify stores have an abandoned cart flow and maybe a welcome email. What they don't have is a lapsed customer win-back, a post-purchase upsell sequence, a browse abandonment series — because building those properly takes hours most owners don't have.

If Composer genuinely compresses that setup time, it closes the gap between knowing what you should be sending and actually sending it.

Four Things Worth Doing This Week​

1. Sign up for the Composer beta​

Takes about 2 minutes.

Go to klaviyo.com/composer and join the waitlist. It's free during the beta period and doesn't require a plan upgrade. If you're not on Klaviyo at all, they have a free tier that covers email up to a certain contact threshold — worth setting up separately even if you decide Composer isn't for you yet.

2. Write down the campaigns you've been putting off​

About 15 minutes, best done now while it's fresh.

Open a note and list the campaigns you know you should have but haven't built: a proper welcome series, a win-back for 60-day lapsed customers, a VIP flow for your repeat buyers. These become the prompts you'll hand Composer the moment you get access. Writing them down now means you won't blank when it asks what you want to build.

3. Turn on personalized send time for your next campaign​

About 10 minutes to configure — available now, no beta required.

This is separate from Composer and already available in most Klaviyo accounts: personalized send time uses AI to deliver each email when that specific subscriber is most likely to open it, rather than blasting everyone at 10am Tuesday. It's in your campaign send settings. A small change, but it keeps paying off with every send after you set it once.

4. Audit your active flows and find the gaps​

About 30 minutes.

Go to your Flows tab and look at what's actually running. Most stores have one or two. What's missing? A post-purchase thank-you sequence? A sunset flow for inactive subscribers? A "thanks for your first order" series that leads to a second purchase? Note the gaps — those are exactly the prompts you'd hand to Composer.

Most stores that don't send enough email aren't short on ideas. They're short on the hours it takes to actually build the campaigns. That's the gap Composer is designed to close.

It's still in private beta, which means it's not fully polished and not everyone has access yet. But it's free to join, and the direction — giving you the campaign structure in minutes instead of days — is directly useful if your email automation is lagging behind where you know it should be.

Worth getting on the list this week, at minimum.

Hang in there. See you tomorrow.

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