Holdline tracks supplier prices, stock, shipping, lead times, MOQs and competitor prices — then sends a weekly margin report plus same-day alerts when a meaningful change is caught.
A personal margin watch for 5 new sellers at a time. Start with a free sample snapshot on your own SKUs — the paid service begins only if it is useful to you.
With 20–100 SKUs across several suppliers, no one re-checks landed cost every week. So the leaks go unnoticed until a quarter looks worse than it should.
A supplier quietly raises unit price and your margin erodes on a SKU you haven't looked at in months.
Shipping per unit creeps up and silently cuts landed margin — separately from the unit cost.
A product goes out of stock at your supplier and you find out only when you try to reorder.
Longer lead times and higher minimums break your cash and replenishment timing.
A competitor undercuts your best SKU and you lose the comparison before you notice.
Most small sellers track all of this by hand, or not at all. There aren't enough hours.
AliExpress, Alibaba, 1688, wholesale sites, manufacturer pages and other public supplier pages — anywhere price, stock, MOQ or lead-time information is visible.
No store or marketplace login required · no private supplier contracts · public links plus your price and fee assumptions are enough for the sample.
Start with a store URL, a small set of priority SKUs, or supplier pages you already use. For the free sample, we usually start with 2–3 products. For the paid service, we define the watched SKU set together.
We map products to supplier pages, shipping assumptions, stock signals, MOQs, lead times and competitor references — then track the changes that can move your margin.
You receive a weekly margin report and same-day human alerts when a material change is caught in your watched SKUs.
A compact margin snapshot with the change, the estimated dollar impact, and one recommended move. Built around your SKUs, suppliers and competitors.
Example data shown. Your report uses your SKUs, your suppliers and your competitors.
Send 5–10 product links and your supplier links.
We prepare one sample margin snapshot on your real SKUs.
If it's useful, your margin watch starts. If not, no cost.
Weekly reports, plus a same-day human alert when something material moves.
Start with a free sample snapshot on your own SKUs. If it is useful, your margin watch starts through a secure Stripe payment link. Capacity is limited to 5 new sellers at a time so we can provide hands-on monitoring and same-day human alerts for material changes.
No payment before the sample snapshot. Monthly, cancel anytime.
Holdline starts as a hands-on margin watch for a small number of sellers at a time. We prepare the first reports personally, verify the numbers, and send same-day human alerts when material changes are caught. The point isn't to make you learn another tool — it's to put a margin watch on the SKUs that matter first.