No — to send offers as a supplier you need an active package: Starter, Growth or Scale. There is no free seller package.
MarbleMap takes no commission on any sale; the platform earns from subscriptions only. That is why browsing demands and bidding is reserved for subscribed sellers.
When you open Marketplace without an active package, the demand list is replaced by the plan picker, with Seller plans shown first. Pick one with Subscribe, switching between Monthly and Annual billing as you prefer. Every package includes a weekly offer allowance that resets each Monday, and you can move up a tier from Settings → Subscription as your volume grows.
Sealed bidding works the same on every package: even on the smallest one your price stays hidden from rivals, and no supplier ever sees how many offers a demand received. A bigger package does not buy you preference — it simply gives you more offers per week.
The buyer side is different: buyers can start free with 2 active demands. Sourcing stone has a free entry point; selling stone needs a package.
Also asked as: Can I bid without paying? · Is there a free plan for suppliers? · Do sellers need a subscription? · Can I see the demands before subscribing?