What Klaviyo Composer Actually Does: A Real Look at the New AI Feature

Direct answer: Klaviyo Composer is an AI feature built directly into Klaviyo that works in two modes: analyze and audit, where it reviews existing flows, campaigns, segments, and SMS content for problems, and create, where it drafts new campaigns and content from a plain-language prompt. Sticky Digital recommends treating Composer as a fast first draft and a sharp diagnostic tool, not a replacement for strategic decisions, since Klaviyo's own documentation is explicit that generated content requires human review before anything sends. Brands that understand this get real time savings. Brands that expect full autonomy get frustrated by a tool that was never built to operate that way.

Sticky Digital's Perspective

Composer launched in March 2026 and moved to public beta at the end of June. In the time since, we've watched two very different reactions to it inside client conversations. One camp treats it like a magic button: describe a campaign, get a finished product, done. The other camp dismisses it entirely because the first draft it produced wasn't perfect. Both reactions miss what's actually going on.

Composer is grounded in a brand's own customer data, not a generic model guessing at what might work. That's the meaningful difference between this and a general-purpose AI writing tool. When it drafts a campaign, it's referencing actual flow history, actual segment behavior, and actual send performance from that specific account. When it audits a flow, it's looking at real customer paths through that flow, not a hypothetical.

What it isn't, and this matters more than the marketing copy suggests, is a system that operates without oversight. Every draft comes back into Klaviyo's normal editor, fully editable, and nothing launches without a human approving it. That's not a limitation to work around. It's the correct way to use a tool that, by Klaviyo's own admission, doesn't guarantee accuracy on every generated output.

The Two Modes: Audit and Create

Audit Mode: Composer as a Diagnostic

In audit mode, you point Composer at something that already exists, a flow, a campaign before it sends, a segment, or SMS content, and ask it to find problems. It can review a flow for structural issues and best-practice misses. It can run a pre-send quality check on a campaign across links, audience targeting, send settings, and compliance details. It can check SMS content specifically for compliance and deliverability risk. It can audit a segment for broken logic, duplicate entries, coverage gaps, and deliverability concerns.

This is the mode most likely to save real time on the first day you use it, because it doesn't require you to describe anything from scratch. You point it at existing work and ask a direct question: is this welcome flow underperforming, and if so, why. The answer comes back with specific findings tied to that flow's actual behavior, not generic best-practice advice you could have found in a help article.

Create Mode: Composer as a First Drafter

In create mode, you describe a goal in plain language, something like building a campaign for lapsed customers with a specific offer and tone, and Composer drafts the audience, the messaging across email and SMS, and the timing. The draft lands back in Klaviyo's editor exactly like any campaign or flow you'd build manually, which means every element is editable before it goes anywhere near a send button.

The most useful create-mode habit we've found is being specific about what should change rather than re-describing the whole thing when you're iterating. If a draft's tone is close but not quite right, tell Composer what to adjust about the tone specifically, instead of restating the entire campaign brief. It handles targeted revision better than it handles being asked to start over on something that was mostly working.

Where the Data Actually Comes From

Composer's recommendations and drafts are grounded in a brand's own account history plus a broader base of marketing performance data and patterns from across Klaviyo's customer base. That's the reason a generic AI tool producing a winback email and Composer producing one aren't equivalent outputs. The generic version doesn't know what counts as "lapsed" for your specific business, what that segment has responded to historically, or which brand rules apply. Composer starts from that context because it's built inside the platform holding the data.

This is also why Composer's usefulness scales with how clean your existing account is. A brand with well-organized flows, consistent segment naming, and a reasonable send history gives Composer more to work with than an account that's been patched together inconsistently for years. If your account has accumulated the kind of technical debt we've written about in our platform migration coverage, Composer's audit function will surface it, which is genuinely valuable, but the create function will be working from a messier foundation until that debt gets addressed.

What Composer Found in Early Testing

The clearest public example of Composer's audit function in action came from a beauty brand using it to review a library of more than one hundred live flows. The audit surfaced what Klaviyo calls collision issues: multiple automations unintentionally targeting the same customers at overlapping times, creating message volume nobody had planned for and, in some cases, actively working against each other. That's a genuinely hard problem to catch manually once a flow library gets past a certain size, since no single person is usually looking at the full picture across every automation at once.

This is the kind of finding that justifies the audit mode's existence independent of whatever the create mode can do. A flow library with 30, 50, or 100-plus live automations accumulates blind spots the same way any large system does, and a tool built specifically to check for overlap and structural issues across the whole thing catches things a quarterly manual audit realistically won't.

Composer Doesn't Work Alone

Composer shares its underlying customer data with Klaviyo's other AI feature, Customer Agent, which handles service conversations across email, SMS, chat, and WhatsApp. The two are designed to feed each other: when Customer Agent resolves a support conversation, it captures preferences and intent signals from that interaction, and Composer can draw on that same record when building the next campaign. When Composer launches a campaign and a customer engages with it, that engagement becomes part of the context Customer Agent has available for the next service interaction.

For a brand running both features, this closes a loop that's historically required manual coordination between a marketing team and a support team who often don't talk to each other daily. A customer who just asked support about a delayed shipment probably shouldn't be the target of an aggressive upsell campaign the same week, and a customer flagged by Composer as high-value shouldn't get a generic scripted response the next time they reach out. Whether a brand actually benefits from this depends on whether both tools are actually deployed together, since the shared context only exists if both sides of the loop are running.

What to Actually Try First

If you're getting access to Composer for the first time, start with audit mode on your highest-volume existing flow, usually welcome or abandoned cart, before touching create mode at all. This gives you a low-risk way to see how Composer reasons about your specific account, and it usually surfaces at least one finding worth acting on regardless of how sophisticated your program already is.

From there, try create mode on something genuinely low-stakes: a single campaign for a well-defined segment with a clear, simple goal. Resist the urge to test it on your most important send first. The goal in week one is understanding how Composer interprets your prompts and how much editing its drafts typically need, not generating a finished, ready-to-ship asset on the first attempt. That calibration period is short, usually a handful of drafts, but skipping it is how a brand ends up either over-trusting an early draft or dismissing the tool entirely after one rough first attempt.

A Note on Beta Status and Access

Composer moved from private to public beta on June 30, 2026, which means it's more widely available than it was a few months earlier, but it's still evolving. Klaviyo has said it's continuing to improve the safeguards that keep generated content accurate and on-brand, which is a reasonable thing to expect from a feature this new rather than a red flag. Brands new to the account can typically start with free credits, which is a low-risk way to run real drafts against your own data before deciding how much of your workflow to route through it.

Worth noting for anyone comparing notes with another brand: because this is a beta feature, the specific capabilities and interface are likely to keep shifting for a while. What's accurate in July 2026 may have expanded by the time you're reading this, so it's worth checking Klaviyo's own product update page directly if a specific capability matters to a decision you're making, rather than relying on secondhand descriptions that may already be a few releases behind.

Why Teams Get Composer Wrong on the First Try

The specific misstep we see most often isn't underusing Composer. It's over-trusting the create mode on the first attempt and treating whatever it produces as ready to send. Klaviyo is direct about this in its own documentation: because of how large language models work, generated content may not always be fully accurate, and reviewing and approving final content stays the marketer's responsibility. Brands that skip a real review pass, treating the first draft as the final draft because it looks polished, are the ones most likely to have a bad first experience with the tool.

This happens because a well-formatted draft creates a false sense of completeness. The email looks finished. The subject line reads naturally. The segment logic seems reasonable on a skim. But "looks finished" and "is correct for this specific customer base and this specific moment" are different standards, and the gap between them is exactly where a human review pass earns its place in the workflow.

How Sticky Digital Uses Composer With Clients

We treat Composer's audit mode as a standing diagnostic layered on top of our own flow audit process, not a replacement for it. Where Composer flags a collision or a structural issue, that becomes a specific, prioritized item in the account's backlog rather than a vague "something might be off" note. We use create mode primarily for first drafts on high-volume, lower-complexity sends, campaigns where speed matters more than nuance, freeing up strategist time for the sends where nuance is the entire point.

Every Composer draft that touches a client account still goes through our normal review process before anything gets scheduled. That's not caution for its own sake. It's the same standard Klaviyo's own documentation recommends, and it's the difference between a tool that accelerates good work and one that quietly introduces small errors at scale because nobody was checking. If you want a closer look at how audit findings turn into an actual backlog, our retention marketing services overview covers how we structure that process.

FAQ

What is Klaviyo Composer?

Composer is an AI feature built into Klaviyo that works in two modes: auditing existing flows, campaigns, segments, and SMS content for issues, and creating new campaigns and content from a plain-language prompt, grounded in a brand's own customer data.

Is Klaviyo Composer fully automated?

No. Every draft Composer produces lands in Klaviyo's normal editor for review, and nothing launches without marketer approval. Klaviyo's own documentation notes that generated content isn't guaranteed to be fully accurate, which is why human review stays a required step.

Can Composer audit an existing flow for problems?

Yes. Composer's audit mode can review a flow for structural issues and best-practice misses, check a campaign before it sends, audit SMS content for compliance and deliverability, and check a segment for broken logic or coverage gaps.

What data does Composer use to generate campaigns?

It draws on a brand's own account history, including flow performance and send behavior, combined with a broader base of marketing performance patterns, rather than generating content with no context about the specific business.

Do I still need a strategist if I'm using Composer?

Yes, particularly for the decisions Composer's own guardrails don't cover: which opportunities actually matter for the business right now, how a draft should be edited to match brand nuance, and whether a flagged issue is worth fixing immediately or scheduling for later.

Brands figuring out where Composer fits into an existing retention program can start here.

Article By: Mariel Kilroy, Co-Founder, Sticky Digital

Mariel Kilroy is the Co-Founder of Sticky Digital, a retention marketing agency specializing in email, SMS, loyalty, and subscription growth for DTC brands.