No fixed number is guaranteed — your demand reaches every verified supplier whose category matches it, and how many of them quote depends on what the demand says.
On the supplier side the feed is match-driven: a supplier only sees demands that fit its own category. So your demand is not dropped onto an open noticeboard; it lands in front of operator-approved businesses that actually work that stone. Spelling out each line with quantity, delivery point, Incoterms and an Offer deadline makes it far easier for a supplier to put a price on it.
Only you can see how many offers arrived. Under sealed bidding a supplier sees neither rival offers nor the offer count, so a thin response never hands the other side a bargaining advantage.
If many offers come in, the screen does not drown you: Triage offers lets you filter and sort, then Offer comparison puts the best six side by side and flags the most advantageous one. The final call always stays with you. Nothing is binding until you accept an offer, so the number of offers never commits you to anything.
Also asked as: How many suppliers will quote? · Will I get enough offers? · How many companies respond to a demand? · What if no offers come in?