If you are sourcing from 1688 to ship overseas, the agent fee varies wildly between ¥0 and ¥15 per order, and that is before you count the photo-review charge, the consolidation fee, the storage cutoff, and the payment processing surcharge. Below is a side-by-side comparison of the 5 agents our extension tracks on every 1688 product page.
1. The 5 agents we track — and the 4 we almost tracked
We show five: BuckyDrop, CSSBuy, Superbuy, Supplyia and Oopbuy. It is five rather than fifteen for two reasons, and neither of them is especially flattering. First, these five publish enough to model — a fee schedule you can read, and for three of them a freight calculator you can check line rates against. We removed two agents outright in 2026 because every shipping figure we had came from third-party round-ups we could not reproduce on their own site. Second, we only carry agents with a public, active referral agreement, because the extension attaches our own code to the link — pasting an unauthorised affiliate parameter into someone else’s URL is not something we are willing to do. Both filters cut the same way. Anything we cannot show you the source for gets labelled unconfirmed or left out.
2. Service fee: four of the five charge nothing on 1688
This is the part most comparison guides get wrong. On 1688, four of the five platforms charge 0% service fee: BuckyDrop, Superbuy, Oopbuy and CSSBuy. BuckyDrop adds a flat ¥9.9 order-fulfilment fee per parcel; Superbuy and Oopbuy add nothing beyond item and shipping. Supplyia is the only one on a percentage — an 11-rung ladder from 10% (orders under $500) down to 5% above $30,000. CSSBuy help pages contradict each other on 1688 fees, so we do not guess: the extension labels its fee “as actually charged”. The headline percentage is the wrong thing to shop on — what decides your landed cost is the shipping line and the fee structure around it. That is exactly why we show all 5 side by side.
3. Photo review: free at two of the five, ¥1.5–¥2 elsewhere
Photo review (QC) is billed per item: Supplyia and Oopbuy include it free, CSSBuy charges ¥1.5, BuckyDrop and Superbuy ¥2. On a ¥300 order that is under 0.7% — small, but across 50 orders a month it quietly adds up. We put the photo slots right on the product page so you decide before shipping, not after paying.
Storage: three of them publish 90 days, one publishes 30
Superbuy, CSSBuy and Oopbuy each publish 90 days of free storage; BuckyDrop publishes 30. That is a tighter spread than most comparison tables show, and we should say plainly that we were part of the problem — this article listed CSSBuy at 180 days until we went back and reconciled every figure against the extension’s own data, and 180 simply is not what CSSBuy publishes. Because the daylight figure is nearly identical at three of the five, the useful comparison is day 91: Superbuy bills around ¥0.1 per item per day past the window, CSSBuy around ¥15 per ID per month, and Supplyia is priced by volume rather than time — limited free space, then roughly $5 per cubic metre per month. Convert that to your own parcel before you rank them. If you ship within 48 hours none of it applies; if you accumulate a month of orders before one international shipment, the overage rule is the line you need to read, not the number of free days.
5. How the 1688CMP extension actually compares them
Open any 1688.com product page with the extension installed. The right-side overlay reads the offer ID from the URL, looks up our open agent list (the list lives inside the extension — no server call), and shows all 5 prices in a single row. Click any agent to open their website in a new tab with our affiliate parameter. No data leaves your browser. No login. No tracking. You decide which agent is cheapest for this specific product, on this specific page, in this specific moment.
FAQ
Do I need to pay 1688CMP?
No. 1688CMP is free and has no paid tier. We earn a small commission when you click through to an agent and place an order with them — that commission comes from the agent, never from you.
Why does the extension show 5 agents and not all 30?
Only 5 agents have public affiliate or referral programs with public commission rates. Adding the rest would mean we cannot show a comparable fee number. We chose accuracy over completeness. The agents we do not track are not worse — they just pay us nothing, and we would have to estimate their fee from public screenshots, which we will not do.
Is there an offline mode?
Yes. The agent list, commission rates, and referral links are all bundled inside the extension. Once installed, it works without an internet connection — the only network call is when you actually click an agent link and load their website.
Does the extension track what I view?
No. There is no analytics, no telemetry, no backend. The privacy policy spells this out — open the extension popup and click "Privacy" to read it.
Which agent is the absolute cheapest?
There is no single cheapest agent, and anyone who tells you otherwise is either quoting one specific parcel or selling you something. The answer moves with item category, order value, how fast you need it, whether you are consolidating several sellers into one shipment, and whether you want photographs before despatch. It even flips between a small dense parcel and a bulky one of the same weight, because volumetric weight is priced differently per line. The reason we built the extension rather than writing this article once and stopping is precisely that — put every quote for your actual parcel on the page you are already looking at, instead of publishing a league table computed from assumptions that are not yours.