AI Tools for Ecommerce: What Each Costs and Replaces

Most pages ranking for “ai tools for ecommerce” name a dozen tools by category and quote nobody’s price. A Salesforce Commerce AI product page, an agency roundup from Scayle and a sixteen-tool listicle from analytics vendor Polar Analytics all describe what each tool does; none of them run a single dollar figure against a Shopify Plus store, and none address a brand that already runs Klaviyo and does not want to pay twice for the same category of AI feature. This comparison covers seven tools a $3M–$30M Shopify Plus brand is actually likely to evaluate, priced from each vendor’s own pricing page rather than a feature list, with an honest line on who each one is not for.

Which AI Tools for Ecommerce Actually Fit a Shopify Plus and Klaviyo Stack?

Fit comes down to three things: what a tool charges for, whether it is already sitting inside a system you pay for, and what happens to your data if you cancel. The table sets the shortlist; the per-tool notes that follow give the honest limits of each option.

n8n Is the Only Tool Here Priced by What It Runs, Not by What It Holds

n8n’s cloud plans charge per workflow execution — one bill for an entire workflow run regardless of how many steps it contains or how much data passes through it (n8n, pricing page, checked September 2026). Cloud Starter is €20 a month billed annually for 2,500 executions, rising to €50 for 10,000 on Pro and €667 for 40,000 on Business, all with unlimited steps. That is a different economic model from tools that charge per task or per operation, where a workflow with ten steps bills ten times against one that bills once for the same run. The free, open-source Community Edition removes the subscription line entirely and runs on your own server — the trade-off is that you, not n8n, own uptime. n8n is not for a brand with nobody who can build and maintain a workflow; it is infrastructure that connects Shopify, Klaviyo and a helpdesk to each other, not a packaged automation someone else operates for you.

Shopify Sidekick and Magic Are Free, but They Stay Inside Shopify’s Own Admin

Sidekick, Shopify’s AI merchant assistant, is included with your Shopify plan at no extra cost, with features and usage limits that vary by plan tier (Shopify, checked September 2026). It is the cheapest entry on this list because it is not a separate purchase. Shopify Magic’s content generation lives in the same admin. Neither reaches into Klaviyo, a helpdesk or a personalization app — both stay inside the store’s own admin panel. Sidekick is not for a brand wanting one AI assistant that also touches email flows, support tickets or the 3PL; for that, the job belongs to an orchestration layer, not a platform-native assistant.

Klaviyo’s AI Add-Ons Sit on Top of a Plan You Already Pay For

Klaviyo prices Composer (AI content generation) and Customer Agent (an AI conversational support agent) as distinct paid products layered on top of its core email and SMS plans, not features bundled free into an existing tier (Klaviyo, pricing page, checked September 2026). Neither carries a flat monthly figure on the public pricing page; both are shown with a limited-time discount, which reads as a newer add-on category still finding its price rather than an established line item. The advantage over a third-party AI writer is that both sit inside the Klaviyo account and customer data you already have, with nothing new to connect. Klaviyo AI is not for a brand that has not first checked whether the task it is buying — drafting subject lines, answering a support message — is already covered by a workflow the team runs today at no marginal cost.

Gorgias’ AI Agent Is Priced Per Resolution, on Top of the Helpdesk Itself

Gorgias ships its AI Agent on every helpdesk plan and prices it per resolved conversation rather than folding it into a flat fee; the base helpdesk itself scales from 50 to 5,000 tickets a month and is never priced per agent seat (Gorgias, pricing page, checked September 2026). The exact per-resolution rate is not shown in a flat table on Gorgias’ public pricing page — it depends on plan and volume, so budgeting it means requesting a quote against your own ticket count. Gorgias’ AI Agent is not for a support inbox running well under 50 tickets a month; resolution-based pricing needs volume to beat a person answering the same tickets directly.

Rebuy Prices by Orders a Month, With a Free Revenue-Share Option Underneath It

Rebuy’s Monetize plan is free to install and takes $0.20 to $0.35 or more per transaction it influences; Platform One, the full personalization suite, is a flat $534 a month, and an à la carte “Build Your Own” tier starts around $25 a month for one package (Rebuy, pricing page, checked September 2026). All three scale against orders per month, on a published slider running from 250 up to 50,000. Rebuy is not for a brand under roughly 250 orders a month — its pricing structure was built around volume the free Monetize plan handles more cheaply until that threshold clears.

Polar Analytics Prices by GMV, and Even Its Own Pricing Page Withholds a Flat Number

Polar Analytics’ Core plan bundles business intelligence, its own “AI Agents” product, and data activations, priced by scaling against a store’s annual GMV entered into a selector rather than shown as a flat figure (Polar Analytics, pricing page, checked September 2026). Its Klaviyo Audiences product prices the same way, against annual Klaviyo revenue. That is worth naming plainly: even the vendor whose own sixteen-tool listicle for this exact search discloses no pricing does not disclose its own price without a GMV input first. Polar Analytics is not for a brand that wants to compare a shortlist on price in an afternoon — every one of its products needs a number entered, or a demo booked, before a cost appears.

Claude and ChatGPT Cost the Least and Connect to Nothing on Their Own

A general-purpose assistant is the cheapest line on this list in absolute terms — Claude Pro is $20 a month per seat (Claude, pricing page, checked September 2026), and ChatGPT is priced comparably. Neither has a native Shopify or Klaviyo connection; every draft, summary or analysis is typed in and pasted out by a person, and nothing runs on a schedule or fires off an event on its own. Claude and ChatGPT are not for a brand that wants anything to watch Shopify or Klaviyo and act without being asked each time — that is an orchestration job, which is what n8n is built for.

What Does Running These AI Tools Actually Cost a $3M–$30M Operator?

The honest answer is that at least three of the seven publish no flat number at all, and the total depends on volume no vendor pricing page shows against your own store. Take an illustrative Shopify Plus brand doing $10M a year in GMV, roughly 900 orders a month, 60,000 Klaviyo profiles and 350 support tickets a month — invented figures, not a real client’s, used only to make the arithmetic concrete.

The four lines with a public number total roughly $608 to $612 a month. The three gated lines — Klaviyo’s AI add-ons, Gorgias’ AI Agent and Polar Analytics — scale with ticket volume, GMV and usage, and any of them could plausibly double that total once priced against real numbers. The only way to get a comparable figure is to request a quote from all three using your own store’s actual GMV, ticket count and profile size before committing to any single one — the method the AI automation agency cost breakdown uses for pricing an agency engagement the same way, line item by line item, rather than by headline number.

Which of These Duplicate Something You Already Pay For?

Three of the seven overlap with a system you likely already run, and checking that overlap first is cheaper than adding a new subscription. Shopify Magic overlaps with a general-purpose assistant like Claude for basic product copy — both draft text, and paying for both to do the same job is redundant unless Magic’s usage limits are already exhausted. Klaviyo’s Composer and Customer Agent overlap with a stand-alone AI email or chat tool in the same way, except the overlap sits entirely inside a platform you have already paid for and already hold customer data in, which is the stronger reason to evaluate it first. Gorgias’ AI Agent overlaps with any third-party AI customer-service product in the same category — if Gorgias is already the helpdesk, its own AI Agent starts from the same ticket data a separate SaaS tool would need reconnecting from scratch.

n8n and Polar Analytics sit apart from that pattern. n8n does not compete with the other six for the same job — it is the layer that watches for an event in one system, such as a Placed Order webhook in Shopify, and acts in another, such as creating a ticket in Gorgias or updating a segment in Klaviyo. The step-by-step AI for ecommerce setup guide covers building that kind of workflow from scratch. Polar Analytics reads from Shopify and Klaviyo rather than replacing either one’s native reporting, which makes it additive rather than duplicative, provided the specific report it produces is not already available for free inside Shopify’s own analytics or Klaviyo’s own dashboards.

What Does It Actually Take to Switch Away From One of These Seven?

Switching effort splits along the same line as duplication. Shopify Sidekick, Klaviyo’s AI add-ons, Rebuy and Claude each produce output — a draft, a recommendation, an answer — that becomes ordinary content the moment it is used; cancelling any of them leaves published pages, sent emails and completed orders exactly as they were, because none of these four is the system of record for anything. Only future output stops.

Gorgias’ AI Agent and Polar Analytics hold more. A support history built up inside Gorgias’ automation rules does not transfer to a different helpdesk automatically, and Polar Analytics’ unified reporting represents months of connected data sources that a replacement analytics tool starts re-building from zero. n8n sits at the far end: because it is infrastructure rather than a point solution, switching away means rebuilding every workflow it runs on a new platform, not just replacing one feature — which is also the reason self-hosting it, rather than renting the cloud version, keeps that rebuilding decision entirely in your own hands.

Evaluating seven tools against one Shopify Plus and Klaviyo stack is not really seven separate purchase decisions. Most of what is native to Shopify or Klaviyo is worth checking before anything gets added on top of it, and what is left over — the handoffs between systems that nobody currently owns, the ticket that should open a Klaviyo flow, the reorder signal that should trigger a Gorgias macro — is an AI agents and automation problem, which is the work we do under AI agents & automation.