Ask your accountant which ecommerce accounting tool to buy and you will usually get a question back rather than an answer. That is the correct response. The tool is downstream of a decision you have not made yet: how much detail your books actually need to carry. A seller who wants a clean tax return needs one thing. A seller who wants to know whether SKU 4471 made money last quarter needs something else entirely, and the second job costs more, takes longer to set up, and breaks in different ways.

Here are the questions an accountant would rather you brought to the first call.

What level of detail do you need in the ledger?

This is the fork in the road, and almost every other decision follows from it.

Summary-level accounting posts one journal entry per marketplace settlement. Gross sales, refunds, marketplace fees, shipping, and sales tax each land in their own account. Your profit and loss statement is correct. Your balance sheet reconciles. You cannot tell which product drove the number.

SKU-level accounting posts the same settlement, then breaks revenue and cost of goods sold down by item. Your inventory account moves as units sell. You can pull margin by product. Your chart of accounts is larger, your reconciliation is slower, and a mapping error on one SKU quietly poisons a whole category.

Most sellers under roughly $2M in revenue do not need the second one. Most sellers above it do, because at that size a two point margin error on a single fast-moving item is real money, and nothing in a summary ledger will surface it.

The honest test

Ask yourself when you last made a decision that a SKU-level number would have changed. If you cannot name one from the past six months, buy the cheaper tool and revisit in a year.

Which accounting system are you committed to?

This narrows the field faster than anything else, and sellers routinely skip it.

If you are on QuickBooks Online or Xero, nearly every option is open to you. A2X publishes on its pricing page that it connects to QuickBooks Online, Xero, and NetSuite. Link My Books states on its pricing page that it supports Xero across all regions and plans except Cashbook, plus QuickBooks Online. ConnectBooks covers QuickBooks Online, QuickBooks Desktop, QuickBooks Enterprise, and Xero.

If you are on QuickBooks Desktop or Enterprise, the field collapses. A large share of ecommerce sync tools were built cloud-first and never went back for the desktop editions. Check this before you fall in love with a demo.

If you are on NetSuite, A2X is one of the few in this category that says it connects, and that is a real advantage worth naming.

Which channels do you sell on, and which do you plan to add?

Channel coverage is where sellers get surprised eighteen months in.

The major tools cluster around Amazon, Shopify, Walmart, eBay, and TikTok Shop. The differences show up at the edges. Link My Books lists Etsy, WooCommerce, and Square among its supported channels. A2X lists Etsy and PayPal. ConnectBooks lists Amazon, Shopify, Walmart, eBay, and TikTok Shop, and does not list Etsy, WooCommerce, or Square.

If Etsy is 4% of your revenue today and you are otherwise happy, that is a manual journal entry once a month. If Etsy is where your brand story lives and you expect it to be 30% next year, it is a disqualifier. Price the gap honestly rather than assuming a tool will add your channel because you asked.

What does entry pricing actually buy you?

The spread here is wide, and the cheap option is genuinely cheap.

A2X starts at US$29 per month for Amazon, Shopify, Etsy, eBay, or PayPal, and US$79 per month for Walmart, according to its pricing page in August 2026. ConnectBooks lists Gold starting at $149 per month, Diamond at $199, and Platinum at $349, each quoted for one marketplace with pricing that moves by monthly order volume, as shown on its pricing page in August 2026.

That is a five-fold difference at the entry point, and it is not a trick. A2X is built around a narrower job: getting accurate summarized settlement journals into your accounting system. If that is the job you have, paying more for inventory valuation and SKU-level profit reporting is paying for capability you will not open.

The comparison flips if inventory is your problem. A seller carrying six figures of stock across multiple warehouses is not choosing between $29 and $149 software. They are choosing between $149 software and a bookkeeper spending eight hours a month rebuilding cost of goods sold in a spreadsheet.

What is genuinely missing from the tool you like?

Every product in this category has a hole. Ask the salesperson to name theirs, then verify it yourself.

ConnectBooks states on its own pricing page that it does not currently provide an open API for external use, that stock is tracked by warehouse but not by bin or zone, and that purchase orders can be created but not emailed to suppliers from inside the platform. If you were planning to pipe SKU-level data into a warehouse or a custom dashboard, that first item ends the conversation.

Xero, for its part, sells Inventory Plus as a paid add-on available only on its Growing and Established plans, per its US pricing page in August 2026, so the inventory story there has a second invoice attached to it. QuickBooks Online does not include inventory tracking on Simple Start or Essentials at all; it begins at the Plus plan, listed at $115 per month on Intuit’s US pricing page in August 2026.

Who is going to run this after setup?

Sync tools do not remove bookkeeping work. They move it. Someone still maps SKUs, reviews the settlements that fail to reconcile, and answers the question of why last month’s inventory adjustment was $4,100.

If the answer is your bookkeeper, involve them in the selection. If the answer is you, weight setup support heavily. Free onboarding calls and mapped chart-of-accounts templates are worth more than a feature you will use twice a year.

How to close the decision

Write down three things before you look at another demo: the accounting system you will not leave, the channels you will sell on for the next two years, and whether you need product-level margin or only a correct return. Any tool that fails one of the three is out, regardless of how good the rest of it looks.

Two references worth reading first. The IRS explains accounting periods and methods, including the accrual method most ecommerce sellers should be using, in Publication 538. Amazon documents the structure of the settlement reports every one of these tools reads from in its Seller Central settlement report reference. Understanding what a settlement contains makes every vendor demo shorter, because you stop being impressed by software correctly reading a file and start asking what it does after that.

Then take the shortlist to your accountant. The question is no longer which tool is best. It is which of these two you would rather reconcile.