Designed for organisations running auctions on behalf of multiple sellers, where consignments, settlement, bidder trust, and operator accountability must be managed within one branded auction environment.
The Multi-Seller model is designed for organisations selling assets on behalf of others, rather than selling exclusively from their own stock.
This includes:
If you need to manage consignments, seller relationships, and post-auction settlement while maintaining control over how auctions are presented and run, this model is typically the right fit.
Running auctions for multiple sellers introduces additional operational responsibility. You are accountable for:
As scale increases, so does complexity.
Generic tools and third-party marketplaces often struggle here because they:
For professional operators, control and clarity are non-negotiable.

Fine Art, Antiques & Collectables | Multi-Seller
Case study: Maak. A specialist auction house using the Multi-Seller model to manage consignments at scale while keeping presentation, bidder relationships, and operator accountability under its own brand.
iRostrum enables organisations to operate Multi-Seller auctions under their own brand, with clear separation of responsibility, strong operational oversight, and a consistent bidder experience.
With iRostrum:
The platform has been shaped by over a decade of supporting professional auction businesses, helping operators handle Multi-Seller complexity with greater clarity, control, and consistency.
From both seller and bidder perspectives, the process feels structured, transparent, and trustworthy.
Multi-Seller auctions are where professionalism is tested most.
iRostrum is designed to support:
This allows you to focus on running successful auctions, rather than firefighting operational issues.
Many organisations begin with a Single Seller model and later introduce Multi-Seller auctions as their business grows. Others operate Multi-Seller auctions as their core model for years.
Some later choose to:
iRostrum is designed to support this evolution without replatforming.
If your operating model changes, the platform can adapt, allowing you to move into a Marketplace model while retaining control over your brand, bidders, and data. There is no forced transition, and no requirement to change how you operate unless you choose to.
Every multi-seller operation has its own commercial and operational nuances.
A demo is an opportunity to:
If you are running auctions on behalf of multiple sellers and need control, accountability, and flexibility, the Multi-Seller model is typically the right choice.
Talk to us about your Multi-Seller requirements
Book a demo