Twinstr is the operating system for multi-channel e-commerce. Products, stock, orders, messages and payouts from Amazon, eBay and TikTok Shop — centralised, translated and synced from a single entry.
| Product | SKU | Stock | Amazon | eBay | TikTok | Price |
|---|---|---|---|---|---|---|
| Men's Running Shoe — Black, 10 | SHOE-BLK-10 | 96 | Live | Live | Live | £29.99 |
| Trail Jacket — Olive, M | JKT-OLV-M | 14 | Live | Syncing | Live | £54.00 |
| Wool Beanie — Charcoal | BNE-CHR-OS | 3 | Low stock | Live | Live | £12.50 |
| Insulated Bottle — 750ml | BTL-750-SS | 210 | Live | Live | Attr. missing | £18.99 |
| Yoga Mat — 6mm, Teal | MAT-TEL-6 | 58 | Live | Live | Live | £24.00 |
Your product exists once — SKU, stock, cost, images, attributes. Each marketplace listing is a representation of it, not a copy you maintain by hand.
Change the master price and every inheriting listing updates. Deliberately set Amazon £4 higher? That override is respected until you say otherwise.
Titles, categories and attributes are rewritten to what each marketplace requires — character limits, taxonomy, required fields — so publishing doesn't fail at the last step.
Twinstr is built in three layers. Each one removes a class of busywork from your day.
Connect your marketplaces and everything flows into one place.
Act once. Twinstr turns it into what each marketplace requires.
With your whole business in one system, it starts telling you what to do next.
Every sale on any channel updates the master count instantly, then pushes availability everywhere else. Safety buffers keep you off the overselling cliff.
Messages from every marketplace land in one queue. The copilot reads the actual order and tracking before drafting — you approve before anything sends.
"Where is my order? I've been waiting for ages."
"Hi Sarah — your order #1042 is in transit with DPD and tracking shows delivery expected tomorrow…" Approve & send
Amazon, eBay and TikTok orders arrive in a single queue. Pick, ship, print the label — tracking is written back to the marketplace automatically.
Listing rejections, dispute deadlines, expired tokens, missing attributes — surfaced before they become suspensions.
Import an Amazon listing and Twinstr rewrites it for eBay and TikTok — respecting each channel's limits, taxonomy and tone. Every AI change is versioned and reversible.
Drop in a supplier CSV and the import engine maps columns, normalises sizes and fixes titles — showing you a diff to approve before anything touches your data.
Fees differ everywhere. Tell Twinstr the profit you want and it computes what each marketplace needs to charge.
Sales velocity across all channels feeds a forecast per product — so "low stock" becomes "four days left, reorder today."
OAuth-based marketplace connections — we never ask for your passwords. Carriers plug in as modules, not hard-coded logic.
Where a marketplace doesn't allow something via API, we say so — and make the remaining steps as short as possible.
We're onboarding a small group of UK multi-channel sellers first. Leave your email and we'll be in touch.