Klaviyo Composer builds your campaigns. EmailStrategist shows you which one is worth the most.
Composer is a genuinely strong way to turn an idea into a built, staged campaign inside Klaviyo. This is a straight look at what it does well, and how to make sure the campaign you build next is the one worth the most, in dollars, on your own data.
Disclosure: we make EmailStrategist, so we're one of the tools mentioned here. This is our honest read, not an independent review. Composer details are from Klaviyo's own material and reflect its public beta as of June 30, 2026.
What Klaviyo Composer does
Composer is Klaviyo's AI campaign agent. Describe the outcome you want, like "win back 90-day lapsed buyers, email and SMS, fresh tone," and it builds the campaign: the audience, the copy for each channel, the timing, and the staged send, ready for your review. It draws on your account plus Klaviyo's intelligence across billions of interactions, and nothing goes out without your approval. When you have a campaign outcome to pursue, it is a fast, capable way to build and ship it.
The move worth building is a decision, in dollars
The revenue is usually upstream: knowing which move, out of everything you could send, is worth the most before you build it. That is the job EmailStrategist does. Composer turns that decision into a campaign; EmailStrategist helps you find the decision worth turning into one.
Sized in dollars, on your data
EmailStrategist reads your account and ranks the highest-value moves you're not sending yet, each with a real revenue estimate, so what you build next is already the highest-value play.
Built around your KPIs
It ranks opportunities around repeat-purchase rate and returning-customer rate today, with LTV and margin-aware ranking on the roadmap.
Aware of your constraints
It's engineered around what your business can't afford to break: a subscription brand's cancellation rate, an engaged-only sending posture, deliverability headroom.
Your brand, curated
A brand brain of your voice, catalog, and history behind every recommendation, and a read on the health and ROI of the whole program, not one campaign.
A cross-cutting read
The program in one view, including revenue by flow type, assembled into the audit so the next move is easier to rank.
Fast to build, deep to decide
The two run at different speeds by design. When you already know the move, Composer builds it in minutes. When you want to find the move, EmailStrategist reads your full sending history overnight and hands back a ranked, dollar-sized list. Fast execution and a deep read are both worth having.
Two different jobs
Not better or worse. Different work, done well.
| Klaviyo Composer | EmailStrategist | |
|---|---|---|
| What it does | Turns a described campaign into a built, staged send | Finds and dollar-ranks the move worth building |
| Works from | Klaviyo's cross-brand intelligence | Your account and your KPIs |
| Best when | You know the move and want it built fast | You want to find the move worth the most |
Decide with the dollars, execute where it's fastest
The two fit together cleanly. EmailStrategist finds and sizes the opportunity and hands you the built email, staged for your review. Take that into Composer, or use the draft we staged, whichever fits your workflow. It works on top of Klaviyo, not as a replacement, and it can push work back into your account. Sometimes EmailStrategist will even tell you Composer is the right tool to execute a given move. That is exactly the point: decide with the dollars, execute where it's fastest.
Is it safe to connect Klaviyo?
- Read-only. It can read your campaign and flow performance. It cannot send, edit, or delete anything in your account.
- No customer data stored. It works from your metrics, not your subscriber list. Names, emails, and phone numbers are never stored.
- Nothing ships without you. Built emails land as drafts for your review; nothing is pushed to Klaviyo on its own.
- Built by an operator. David Refaeli-Berman ran enterprise email at Chewy, Amazon, Overstock, and Bed Bath & Beyond.
Questions
What is Klaviyo Composer?
Klaviyo Composer is Klaviyo's AI campaign agent. You describe the outcome you want and it builds the campaign: the audience, the copy for each channel, the timing, and the staged send, ready for your review. It draws on your account plus Klaviyo's cross-brand intelligence, and nothing sends without your approval. It entered public beta on June 30, 2026.
Is Klaviyo Composer good?
For turning a campaign you've decided on into a built, staged send inside Klaviyo, yes, it's strong and fast. It shines when you already know the move you want to make.
Do I still need anything alongside Klaviyo Composer?
Composer builds the campaign. The revenue is often in the step before: deciding which move, out of everything you could send, is worth the most on your data. That prioritization is where EmailStrategist works.
Can I use EmailStrategist with Klaviyo Composer?
Yes. They're complementary. EmailStrategist finds and sizes the highest-value opportunity in your account, then you build and ship it in Composer. It works on top of Klaviyo, not as a replacement.
Is there a Klaviyo Composer alternative?
It depends what you're comparing. For building campaigns fast inside Klaviyo, Composer is purpose-built. For finding and dollar-ranking which campaigns are worth building next on your own data, that's a different job, and the one EmailStrategist does.
See the move worth building next.
A free audit reads your Klaviyo account and ranks the highest-value email you're not sending yet, in dollars, then builds it.