Klaviyo's AI or a Klaviyo Agency: What Composer Does and What Still Needs a Team

What does Klaviyo's AI do today?

Klaviyo sells two AI agents. Composer is the marketing agent. Customer Agent handles customer service conversations, so it is outside the agency question.

According to Klaviyo's Composer page, as of mid-October Composer can:

• Answer questions about your business using your Klaviyo data, with sources shown.
• Build campaigns from a prompt. You describe the outcome, and Composer builds the audience, drafts the content and gets the campaign ready for review.
• Find opportunities by analyzing your data and recommending what to do next.
• Create and improve campaigns, flows and audiences, working from the brand voice, tone and compliance rules you give it.
• Run recurring tasks on a schedule.

Composer is priced by usage, listed separately on Klaviyo's pricing page, and the free plan includes a small monthly allowance. Check the current terms there, because they change with the product.

What does it still leave to you?

Klaviyo answers this in its own FAQ. Asked whether Composer publishes anything without approval, the answer begins: "You stay in control of customer-facing marketing." Composer prepares the work and you review it before it goes live.

That review is where most of an email program's judgment sits. The AI drafts quickly, but it needs decisions it cannot make on your behalf:

• What to promote and when. Stock levels, margins, launches and which products need a push are business calls.
• How deep to discount. A bigger discount raises this week's revenue and teaches customers to wait for the next sale.
• Whether a draft fits the brand. Voice rules catch the obvious misses. Knowing what your customers will find off-key takes someone who knows them.
• The final check on each send. Links, discount codes, the audience, the send time and how the email renders.
• How everything fits together over a quarter. Which flows exist, how campaigns and flows avoid hitting the same people twice, and what to test next.

With Composer, the work shifts from producing emails to deciding and reviewing them. Whether that helps you depends on who in your company has time to decide and review.

Composer or an agency: who does each job?

The comparison comes down to the rows where the answer is "You". With Composer those jobs stay in-house. With an agency they move to people whose job is email, and you keep the final approval.

At Huge Win Media, for example, every email goes through an editor who checks grammar, facts and voice before it is scheduled, and copywriters are matched to clients by industry. That review layer is what an agency adds on top of production, and it is the part an AI agent leaves with you.

When is Klaviyo's AI enough on its own?

Composer alone is a reasonable choice when most of these are true:

• Someone in-house has marketing judgment and a few hours a week to decide the calendar and review drafts carefully.
• Your flows already work, and campaign production is the bottleneck.
• Your send volume is modest, so reviewing every draft is realistic.
• Your budget is small. Usage pricing on a tool you already pay for costs less than an agency fee.

In that situation an agency mostly replaces production work the AI can now do, and the case for hiring one is weaker than it was a few years ago.

When does an agency still make sense?

• Nobody in-house can own the decisions and the review. An AI agent produces more drafts. Without a reviewer, more drafts means more risk.
• Your flows are missing or broken. Composer can create flows, but someone has to decide what each one should do, set the logic and test it against real triggers. At Huge Win Media a flow build is a one-off project quoted after a free audit, from $3,500^[1].
• Your brand needs design and writing above template level. Launches and seasonal sales often do.
• You want one party accountable for what ships and what it produces.

Huge Win Media charges $100^[1] to $200^[1] per campaign email depending on format, with no minimum term on monthly work. Compare that fee with the hours your own team would spend deciding, reviewing and fixing.

A combination that often works

The two do not exclude each other. A common split:

• The agency runs the program: flows, the campaign calendar, design, writing and the review before each send.
• Your team uses Composer for questions: what sold last week, which segment is shrinking, what a promotion did. Answers grounded in your own data make your reviews of the agency's work sharper.

The reverse split also works. Your team runs everyday campaigns with Composer, and an agency handles the projects that need specialist time, such as a flow build or the peak season calendar. For how that peak season timing works, see hiring a Klaviyo agency before Black Friday.

Questions to ask an agency about AI

1. Which parts of your process use AI, and who reviews the output?
2. What does a person check before each email is scheduled?
3. How does your price reflect the work? Per-email or per-project pricing shows what you pay for. An hourly retainer leaves the question open.
4. Who owns the templates, brand settings and audiences built in my account? The answer should be you.
5. Will you use Klaviyo's own AI features in my account, so I am not paying twice for the same work?

For a broader checklist, see how to vet a Klaviyo agency, and for the cost side, see whether a Klaviyo agency is worth it.

Common questions

Can Klaviyo's AI replace an email marketing agency?

It can replace much of the production work. It does not replace the decisions and the review, and Klaviyo's own FAQ leaves customer-facing approval with you. If someone on your team can own those, Composer may be enough. If not, an agency covers them.

Is Klaviyo Composer free?

Composer is priced by usage. Klaviyo's free plan includes a small monthly allowance, and paid plans are listed on Klaviyo's pricing page. Check there for current figures, since AI pricing changes often.

Do Klaviyo agencies use Klaviyo's AI?

Some do, and you should ask. The useful question is who reviews what the AI produces before it reaches your customers, and whether the agency's price reflects work that AI now does faster.

Find out which one your account needs

Whether Composer is enough depends on your flows, your send volume and who on your team has time to review. Book a free Klaviyo audit and we will tell you which parts of your email program an AI agent can handle, which need people, and whether you need an agency at all.