These three tools come up in every e-commerce bookkeeping thread, they overlap, and the marketing makes them sound identical. They aren't. Here's an honest read on what each is actually good at, where it frustrates people, and how to pick — including where a newer option fits.
The two jobs these tools split
It helps to notice that "seller accounting" is really two different jobs:
- Journal-entry / bookkeeping sync — turning marketplace settlements into clean entries in QuickBooks or Xero so your books are accurate and tax-ready.
- Profit & reconciliation — telling you, per SKU and per channel, what you actually made after every fee, and catching the money that leaks.
Most tools lean hard toward one job. Mismatching the tool to the job you actually have is the usual reason people churn.
A2X
A2X is the incumbent for the bookkeeping-sync job. It maps settlements into summarized journal entries for QuickBooks/Xero, and accountants trust it. If your goal is clean, accountant-ready books, it's the reference.
The friction people cite most is per-channel pricing: costs scale by channel and order volume, so a genuinely multi-channel seller (Amazon + Shopify + TikTok) can end up paying several times what a single-channel seller pays. It's a connector, not a profit dashboard — it makes your books right, it doesn't hunt for overcharges.
Link My Books
Link My Books plays the same bookkeeping-sync role and is especially strong on UK/EU VAT handling, with a following among accountants there. Similar shape to A2X: excellent at producing correct journal entries, priced and built around that job. If VAT is your headache, it's often the first recommendation.
sellerboard
sellerboard comes from the other side: it's a profit dashboard, Amazon-first, strong on live per-SKU profit and on tracking reimbursements. Sellers who live inside Amazon like it. The limitation for a multi-channel operator is exactly that origin — its Amazon strength doesn't automatically become a clean multi-channel, books-grade view, and other channels can feel bolted on.
How to choose
| If you want… | Start with |
|---|---|
| Accountant-ready books, US-centric | A2X |
| Accountant-ready books, UK/EU VAT | Link My Books |
| Live Amazon profit per SKU | sellerboard |
| One reconciliation view across Amazon + Shopify + TikTok, flat-priced | see below |
Where Sumhound fits
Sumhound is built for the seller who is genuinely multi-channel and tired of per-channel pricing and two different tools. It reconciles Amazon, Shopify and TikTok Shop settlements in one place, rebuilds each payout to the cent, and — this is the part the others don't lead with — flags fees that look wrong, like a per-unit FBA fee that jumped without a product change, or a TikTok settlement that's short against its orders.
It's honest to say Sumhound is newer and narrower than these established tools: if you need deep VAT filing or a mature QuickBooks journal integration today, the incumbents lead there. What Sumhound does that none of them do cleanly is give a multi-channel seller one flat-priced reconciliation-and-anomaly view. And the settlement analyzers are free to try right now — no signup, files never stored — so you can see your own numbers before deciding anything.