klaviyo.comcontributed by Samuele Ongaro
The value is the network, the data or the infrastructure. Keep paying.
Email and SMS marketing built around e-commerce: it reads your store, knows what each customer bought, and drives flows like abandoned cart and post-purchase from that.
Do not build this if you run a shop of real size. Store data and revenue attribution are the product. Knowing what each customer bought, when, how often and for how much — and tying a flow to the revenue it produced — is what justifies the price. Rebuilding it means a reliable sync of your entire commerce history plus attribution you can defend, and the second half is where homemade versions quietly mislead. WHEN TO KEEP PAYING - Enough revenue that a few percentage points from better flows exceeds the fee - SMS alongside email, which is a provider, a per-message cost and a registered sender identity in most countries WHEN TO BUILD - A small shop where the flows are abandoned cart, post-purchase and a monthly newsletter. That is three sequences, and the shape is under Loops and Brevo elsewhere in this catalogue THE FLOWS THAT ACTUALLY EARN, IN ORDER - **Abandoned checkout**, which is nearly always the largest single line. One message, or at most two. Three is where people start marking mail as spam - **Post-purchase**: the receipt, the shipping note, and a follow-up asking how it went. The last one produces reviews, which are worth more than the email - **Win-back** for somebody who has not ordered in a while, sized to your own repurchase interval rather than a generic ninety days - Everything else is a newsletter ATTRIBUTION, HONESTLY - Attributed revenue is a model, not a measurement. A last-click window will happily claim a purchase somebody was going to make anyway - State the window and the rule beside every figure, and compare against a holdout — a small share of eligible customers who receive nothing — because that comparison is the only honest measure of what the flow added - Without a holdout you are reporting correlation and calling it revenue, which is the specific way this category flatters itself THE TWO RULES TO TAKE WHATEVER YOU DECIDE - One contacts table and one sends table, so you can ask how many messages somebody has had today before sending another - A frequency cap enforced in the send path. Transactional always goes; marketing respects the cap THE ONE-LINE VERSION Buy it at scale. Build three flows for a small shop — and run a holdout, or you are guessing.
What you lose
- A live connection to the store — orders, carts, catalogue and browsing — that keeps flows accurate without you writing a sync
- Revenue attributed per flow and per campaign, which is how the spend gets justified internally
- Predictive figures like expected lifetime value and next order date, trained on data far beyond your own store
- SMS delivery with the carrier registration and compliance already handled
If you would rather not build
- Brevo, for a cheaper version of the same
- Your platform's built-in email, which is often enough at the start
What it costs
as published on their pricing page
| Plan | Billed monthly | Billed yearly | Last read |
|---|---|---|---|
| — | $45/mo | — | — |
Their pricing page is where these came from. Seeing a different price? Tell us.
The escape hatch
open source · no votes, no paid placement
Listmonk
$0Self-hosted campaigns with an API you can call from store webhooks.
knadh/listmonkfree · open source
Medusa
$0An open commerce backend whose events can drive your own flows.
medusajs/medusafree · open source
Why this verdict
our own opinion · changed only by a person
26/100
Verdict no at 26. The flows are copyable; the store integration, the predictions and above all the revenue reporting are what the price buys.
History
tracked since 10 Aug 2026 · nothing is ever overwritten
Questions about Klaviyo
answered from the record above
Is Klaviyo free?
No — the plan we track is $45 a month. From around $45/month billed monthly for 1,500 contacts; the price climbs steeply with list size and SMS.
Can you replace Klaviyo by building your own?
KEEP IT. The value is the network, the data or the infrastructure. Keep paying. Replacement score 26 out of 100, build time longer than it saves. Read what you lose before you decide.
How much does Klaviyo cost?
$45 a month on Email — $540 a year. Recorded 9 Aug 2026.
What do you lose by replacing Klaviyo?
A live connection to the store — orders, carts, catalogue and browsing — that keeps flows accurate without you writing a sync; Revenue attributed per flow and per campaign, which is how the spend gets justified internally; Predictive figures like expected lifetime value and next order date, trained on data far beyond your own store; SMS delivery with the carrier registration and compliance already handled. If any of those carry weight for you, keep paying.
Is there an open-source alternative to Klaviyo?
Yes: Listmonk, Medusa. The prompt on this page is for when you want it your way instead.
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