A SellerSheet alternative that sends your AI the playbook, not 279 raw tools.
Both plug your Amazon account into Claude or ChatGPT over MCP, and both let you keep a human approving — Epinium also lets you delegate to an autonomy mode that applies changes directly, always starting new campaigns and workflows paused with every change logged for 90 days. The difference is the payload: SellerSheet exposes roughly 279 API tools and lets your assistant work out what to do; Epinium serves 100 versioned marketing playbooks across 22 disciplines, each with its formula, its statistical threshold and an explicit list of what not to do.
Free to start · No credit card · Writes on Business, opt-in
Epinium vs SellerSheet: the short answer
SellerSheet and Epinium both put your Amazon account inside Claude or ChatGPT over MCP, and both let you keep a human approving changes — Epinium also lets you delegate to an autonomy mode that applies changes directly once you turn it on, with new campaigns and workflows always starting paused and every change logged for 90 days. The difference is what travels down the connection. SellerSheet sends the API: roughly 279 tools across orders, inventory, advertising, FBA and pricing, and your assistant decides what to do with them. Epinium sends the method: 100 versioned marketing playbooks across 22 disciplines, each carrying the formula, the statistical threshold that makes it valid, its confidence level and an explicit list of what not to do — with a CMO playbook that routes the question to the right specialist. Pick SellerSheet for the widest raw endpoint coverage at the lowest price; pick Epinium when you want the decision criterion, not just the data access.
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Choose SellerSheet if…
- You want the widest raw endpoint coverage in a chat window: roughly 279 tools spanning orders, inventory, advertising, FBA shipments, pricing and vendor retail.
- Google Sheets is where your team already works. Their agent writes proposals into a sheet you approve — a low-friction trust design, and the same principle Epinium calls human-in-the-loop.
- Price is the constraint. There is a free plan with no card, and Basic is $9.99/month — below anything Epinium sells. For a solo seller on one marketplace, that is the honest answer.
Choose Epinium if…
- 279 tools are not 100 playbooks. A tool hands your assistant the endpoint; a playbook hands it the formula, the statistical threshold that makes it valid, its confidence level and an explicit list of what not to do.
- You want an answer, not a tool-picking problem. A curated catalogue with a routing playbook keeps selection accurate; hundreds of near-identical tools is a precision cost your assistant pays in wrong calls.
- Your work is wider than the Amazon API. Epinium covers 22 marketing disciplines — pricing, retention, conversion, brand, PR, SEO/GEO — plus listings, catalogue, stock and analytics in the platform itself, and connects your Shopify or WooCommerce store to the same assistant.
- A published quota should stay published. In August 2026 SellerSheet halved MCP requests per minute across all five tiers without changing prices, cut Pro from 10 marketplaces to 5, and reduced seats on three tiers.
What our clients say
Epinium vs SellerSheet, criterion by criterion
Scroll the table sideways to see both columns
| Criterion | Epinium | SellerSheet |
|---|---|---|
| Company & HQ Who you are buying from and where support sits | Epinium — European company, product and data in the EU | Not publicly documented — no team, HQ or funding disclosed |
| Built for The segment the product is actually designed around | Brands, manufacturers and agencies selling across Amazon EU | Amazon sellers of every size, from solo sellers to multi-account agencies |
| Public entry price Lowest published price — many vendors publish none | Guru from €159/mo · Business €349 · Master €799 | Free plan, then $9.99/mo Basic up to $199.99 Enterprise |
| Pricing model A % of ad spend means your bill grows as you scale | Published subscription + advertising commission, 5% down to 2% by volume (Business and Master) | Flat tiers by marketplaces, orders and MCP requests per minute. No ad-spend commission |
| Platform scope Advertising only, or advertising + listings + stock + P&L | Advertising + listings + catalogue + stock + analytics in one platform | Amazon only — SP-API and Ads API. No Shopify, Walmart or TikTok Shop documented |
| Human approval (HITL) & audit trail Whether AI acts on your account before a person signs off | Yes — approval queue, HITL lock on sensitive actions, full audit trail | Yes — the agent writes proposals into a Google Sheet you approve first |
| GEO — listings optimised for Rufus & AI assistants The discovery surface advertising tools ignore | Yes — listing optimisation for Rufus and other AI assistants | Not publicly documented |
| P&L and margin per product TACOS, fees, product cost and contribution margin, not just ACOS | Yes: P&L and margin per product with fees, advertising by type and product cost (contribution margin on Business) | No profit-per-ASIN or P&L module documented publicly |
| Amazon EU depth ES, IT, DE, FR, UK as first-class markets, not translations | Purpose-built for ES, IT, DE, FR and UK with localised keyword data | Up to 50 marketplaces on Enterprise; no EU-specific depth documented |
| EU data & AI Act posture Where your commercial data lives and how AI use is governed | EU data under GDPR, aligned with the EU AI Act, no training on your data without consent | No data-residency or AI Act statement found in public sources |
| Open to your AI agents (MCP) Can Claude/ChatGPT query the platform on your behalf | Yes — Epinium MCP reads on every plan; writes workflows, SP/SB/SD campaigns, portfolios and tasks on Business (opt-in scopes); 90-day change log | Yes — its own MCP gateway, ~279 tools, rate-limited per plan |
| Free trial Can you evaluate it before a sales call | Yes — free to start, no credit card | Free plan, no card — 1 marketplace, 300 AI operations a month |
Competitor data verified on from the public sources below. Capabilities a vendor does not document publicly are marked as such rather than denied. Spotted something out of date? Tell us and we will correct it.
Sources: SellerSheet — official site and pricing SellerSheet — documentation Epinium — MCP server
A tool gives access. A playbook gives criterion.
SellerSheet is a credible product and its Google-Sheets approval layer is a good design. These are the places where an endpoint bridge and a served method stop being the same thing.
100 marketing playbooks, inside the Claude or ChatGPT you already use.
Twenty-two disciplines, backed by the experience of 500 brands. Not a data pipe — a marketing department. No card required.
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What our customers say
With a vast catalog and little time, we trusted Epinium to optimize our listings. This led to increased organic sales and improved advertising performance through AI, allowing us to focus on growing our business.
Alberto Feria
CEO, Alfa Holding
With Epinium, we are able to save a lot of time editing our clients' listings thanks to its bulk editor and Artificial Intelligence. We are able to take care of their strategies.
Miriam Larrosa
CEO, Roicos
Our expectations were certainly exceeded. Everything is just so well thought out, and snappy. Their support team is excellent too!
Neus Dominguez
Marketplace Manager, Labbox
We use Epinium every day to monitor the status of all our ASINs across all marketplaces and improve our SEO very productively. An indispensable tool that lets us manage a much larger catalog than we imagined. Worth every penny.
Oriol Penya
Organic Beauty Brands
It is impossible to calculate the hours Epinium has saved me managing customer catalogs. I've modified catalogs of up to 3,500 SKUs and run SEO audits comfortably from the same panel.
Jordi Ordóñez
Amazon Consultant
Epinium's ability to analyze and adjust ads in real-time based on performance has enabled us to maximize ROI and achieve our business goals more effectively. Without a doubt, I recommend Epinium to any seller.
Edgar Alvarez
Head eCommerce, BANDAI Entertainment Europe
Get the method, not the endpoint list.
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ExploreFrequently asked questions
Is Epinium MCP the same thing as SellerSheet’s MCP gateway?
Both are MCP servers over an Amazon account, so the plumbing is comparable. What they expose is not. SellerSheet publishes roughly 279 tools mapping SP-API and the Ads API. Epinium publishes 41 read tools — plus write tools for workflows, Sponsored Products, Sponsored Brands, Sponsored Display, portfolios and tasks on Business, opt-in — and a catalogue of 100 marketing playbooks across 22 disciplines — the decision method rather than the endpoint surface.
Does SellerSheet keep a human in the loop?
Yes, and it is one of their better ideas: their agent writes proposed changes into a Google Sheet, and the seller approves before anything reaches Amazon. Epinium draws the line with permissions instead: its MCP reads by default on every plan, and writes — workflows, Amazon Ads campaigns (Sponsored Products, Brands and Display), portfolios and tasks — just on Business, through two scopes you tick when you create the key. Workflows it writes are left paused and new campaigns are created paused, you can simulate before anything runs, and every change is logged for 90 days. The catalog is never editable over MCP.
Which one is cheaper?
SellerSheet, clearly. It has a free plan with no card and Basic at $9.99 a month, up to $199.99 for Enterprise — below anything Epinium sells. Epinium publishes Guru at €159, Business at €349 and Master at €799 a month, and has its own free plan for MCP access with a monthly token allowance.
Is SellerSheet multi-channel?
Not according to its public sources: SP-API and the Ads API, Amazon only, with no Shopify, Walmart or TikTok Shop integration documented. Epinium’s live connected data is Amazon — Seller, Vendor and Ads — plus your Shopify or WooCommerce store, and the playbook catalogue covers 22 disciplines and names more than 70 tools.
Why does the number of tools matter?
Because tool selection degrades as a catalogue grows. Hundreds of similar tool descriptions crowd the assistant’s context and make wrong calls more likely, which the user experiences as an assistant that misunderstands. A curated catalogue with a routing playbook keeps selection accurate — that is a deliberate design choice, not a coverage gap.
How much does SellerSheet cost compared with Epinium?
SellerSheet: Free plan, then $9.99/mo Basic up to $199.99 Enterprise. Epinium publishes its pricing: Guru from €159/mo, Business €349 and Master €799 — published, not quoted on request. Business and Master also carry an advertising commission that tapers from 5% to 2% with volume, charged only on the ad spend Epinium manages. You can start free with no credit card. Full detail on Epinium pricing. Competitor data verified on 13 August 2026 from public sources.
Is there a European alternative to SellerSheet?
Yes — Epinium. Not publicly documented — no team, HQ or funding disclosed. Epinium is a European company with data held in the EU under GDPR, aligned with the EU AI Act, and purpose-built for Amazon EU — Spain, Italy, Germany, France and the UK — with keyword data localised per marketplace rather than a translated engine.
Does SellerSheet optimise listings for Rufus and AI shopping assistants?
Not publicly documented. Epinium does: it optimises your listings to rank in Rufus and other AI assistants (GEO), writing content for the shopper and for the models that recommend to them — see GEO / AI search. To be precise: Epinium optimises for that surface; it does not measure your share of voice inside Rufus.