Amazon Account Management Agency vs FBA Agency vs Consultant.

An Amazon account management agency runs your entire Seller Central account: catalog, inventory, ads, content, customer service and account health. An FBA agency runs the operations side, meaning inventory planning, shipments, reimbursements and health, and usually leaves ads and content to someone else. A consultant or fractional Amazon lead owns the plan and the decisions and directs whoever does the work. A Vendor Central agency is a fourth category for brands selling to Amazon as a 1P supplier, and it is a different job again.

Most brands pick the wrong one because the names overlap and every sales deck promises everything. This guide defines the four, gives you a decision table by stage, revenue, SKU count and in-house capacity, lists what each one owns day to day, shows where handoffs between them fail, and spells out the access and reporting you should insist on before anyone touches the account.

The four kinds of Amazon agency.

Full account management agency. One firm, one point of contact, the whole account. They build and maintain listings, plan inventory and FBA shipments, run Sponsored Ads and sometimes DSP, produce A+ Content and the Brand Store, handle buyer messages and reviews, fight suspensions and chase reimbursements. The pitch is accountability: one throat to choke. The weakness is that few firms are equally good at ads, operations and creative, so you are usually buying one strong department and two average ones.

FBA and operations agency. These firms live in inventory, shipments, account health and money. Restock planning, FBA shipment creation and reconciliation, stranded and unfulfillable inventory, removal orders, IPI, FBA fee audits, lost and damaged reimbursements, and the case log with Seller Support. Many came out of brand aggregators or 3PLs. They are usually not ad people and will say so. Hire them when operations is the bottleneck and marketing is already covered.

Consultant or fractional Amazon lead. One senior operator, part time, who sets strategy, reviews numbers weekly, makes the calls on pricing, launches and budget, and directs an in-house team, freelancers or an agency. They do not click buttons in Seller Central all day. The value is judgment and the ability to say no. The risk is a strategist with nobody competent to execute, which produces excellent decks and flat sales.

Vendor Central agency. If Amazon buys your product wholesale and sells it as the retailer, you are 1P and you live in Vendor Central, not Seller Central. The work is different: purchase order management, retail terms and co-op negotiation, chargebacks and shortage disputes, Amazon Vendor Services, and ads run through the vendor side of the console. Our Amazon Vendor Central page covers that work, and Amazon 1P vs 3P covers whether you should be there at all. A 3P agency that says it "also does Vendor Central" should be asked how many chargeback disputes it filed last quarter.

Which one fits your brand.

The decision is about capacity, not prestige. The question is which jobs you can do well in house today, and which ones are already costing you money because nobody owns them. Use the table as a starting point and adjust for how much time the founder is really willing to spend in Seller Central.

If you land between two rows, pick the one that covers the job currently losing you the most money. A brand with stockouts every quarter needs operations before it needs a better Brand Store. Then write down the one job you are hiring for, because the next section shows how many jobs there are.

What each one owns day to day.

Catalog. Full account management owns it: new ASIN creation, variations, parent-child fixes, category and browse node errors, suppressed listings, and the flat files that keep breaking. An FBA agency will fix catalog issues that block shipments or strand inventory and nothing more. A consultant decides what to launch and kill. A Vendor Central agency manages the vendor catalog and the item setup Amazon demands.

Inventory and FBA shipments. This is the FBA agency's home turf: forecasting, restock limits, shipment plans, inbound reconciliation, stranded and aged inventory, removal orders and IPI. Full account management agencies own it too, with varying competence; ask to see a restock plan before you believe it. Consultants set the inventory policy. Our guide to Amazon inventory management covers what good looks like.

Ads. Full account management agencies run Sponsored Products, Brands and Display, and the better ones run DSP. FBA agencies almost never touch ads. Consultants set the budget and the TACOS target and review the results, but someone else executes. Vendor Central agencies run ads on the vendor side, which has its own quirks. If ads sit with a different firm than the account, read the handoff section twice.

Content. Titles, bullets, images, A+ Content, Brand Store and video. Full account management owns the words and usually coordinates the images; actual production is often billed per asset. FBA agencies do not do content. Consultants brief and approve. Vendor Central agencies own A+ and Brand Store on the vendor side, where approvals move slower.

Customer service. Buyer messages inside the 24-hour window, review responses, return and refund handling, and the feedback removal requests. Full account management agencies usually include it. FBA agencies include it when it affects account health and not otherwise. Consultants do not do it. On Vendor Central, Amazon is the retailer and handles the customer, so this one mostly disappears.

Reinstatements and account health. Listing suppressions, ASIN-level blocks, IP complaints, policy warnings and full account suspensions. FBA and operations agencies are often the strongest here because they live in the case log. Full account management agencies handle the routine ones and may bring in a specialist for the serious ones. If you are already in trouble, read what to do when your Amazon account is suspended before you hire anyone.

Finance and reimbursements. FBA fee audits, lost and damaged inventory claims, overcharged weight and dimension fees, settlement reconciliation, and the monthly P&L by ASIN. FBA agencies own this and some are paid a share of what they recover. Full account management agencies vary from excellent to absent; ask for the last reimbursement report. Consultants read the P&L and make decisions from it. Vendor Central agencies own shortage claims, chargebacks and co-op deductions, which is a full-time job on its own.

How handoffs fail between them.

Every expensive Amazon failure we have seen in our own accounts and in brands we have looked at follows the same shape. Two parties each owned half of a number and nobody owned the number. The ads team pushed a hero ASIN hard in October. The ops team saw the velocity spike and had already placed the restock order on last month's forecast. The brand assumed both were talking. The ASIN stocked out on November 20, the ads kept spending until someone noticed, and the organic rank built over nine months was gone by January.

The same break happens in the other direction. Operations holds back inventory to protect IPI or storage limits, the ads team sees conversion rate fall on a listing that now shows a long delivery date, and bids get cut on the brand's best product at the exact moment it should be defended. Or the consultant approves a price increase, nobody tells the ads team, ACOS jumps, and the campaigns get restructured to fix a problem that was a pricing decision.

• Ads and inventory report to different people and never share a forecast.
• A listing change (title, image, price) ships without telling whoever runs the campaigns on it.
• A suspension or suppression is handled by operations while ads keep spending on the blocked ASIN.
• The consultant sets a TACOS target and the ads agency reports ACOS, so the two never discuss the same number.
• Reimbursements are nobody's job because the FBA agency was never hired and the full-service agency assumed you did it.

Access and reporting to demand.

What usually goes wrong.

• A full-service agency is strong on ads and weak on operations, and the brand finds out during a stockout, not during the pitch.
• An FBA agency is hired to fix operations while ads keep running on the ASINs it is trying to stabilize, so velocity and inventory never line up.
• A consultant produces a plan and nobody with Seller Central permissions has time to execute it.
• The agency registered the Seller Central or ad account, and leaving means losing years of campaign and sales history.
• Reports cover ACOS and ad sales only, so the brand cannot see that total sales are flat while ad spend doubled.
• Reimbursements go unfiled because each party assumed another was doing it, and the claim windows close.
• A 3P agency takes on Vendor Central work it has not done before and the chargebacks pile up faster than the fees it saved.

Each of those is a missing owner, a missing permission or a missing report. Fix the three before you fix the agency.

Where the agency stops and the work begins.

No agency makes a product worth buying, funds inventory, or decides what your brand is for. Those stay with you. What a good agency does is remove the reasons a good product fails on Amazon: a listing that does not convert, stock that runs out, ads that measure the wrong thing, and a case log nobody reads. The right structure is the one where every number on the scorecard has one owner and you can see all of it from your own login.

Theory Road runs its own Seller Central accounts, so we manage client accounts the way we manage ours: TACOS not ACOS, inventory and ads on the same forecast, and your account under your login with us as named users. As an Amazon account management agency we take the full account, or just the Amazon PPC management piece when your operations are already handled. If you want the scorecard and the ownership map before anyone touches the account, Hire Theory Road.