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iRostrum

Run auctions on behalf of multiple sellers with confidence and control

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.

Timed Auctions

Who this model is for

The Multi-Seller model is designed for organisations selling assets on behalf of others, rather than selling exclusively from their own stock.

This includes:

  • Auction houses managing consignments from multiple vendors
  • Businesses acting as an intermediary between sellers and buyers
  • Organisations running mixed catalogues from different sellers
  • Operators running both one-off auctions and ongoing auction activity

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.

What running a Multi-Seller auction involves

Running auctions for multiple sellers introduces additional operational responsibility. You are accountable for:

  • Managing consignments from different sellers
  • Presenting assets consistently under your brand
  • Ensuring bidders experience a clear, trusted auction process
  • Handling payments, fees, and settlement correctly
  • Providing transparency and auditability for sellers and buyers

As scale increases, so does complexity.

Generic tools and third-party marketplaces often struggle here because they:

  • Blur responsibility between operator and seller
  • Limit control over rules, charges, and workflows
  • Introduce risk around settlement and reporting
  • Undermine trust when issues arise

For professional operators, control and clarity are non-negotiable.

 

Maak: running a specialist Multi-Seller auction model under its own brand

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.

Read the case study

How iRostrum supports the Multi-Seller model

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:

  • Remain the auction operator, with clear control over how auctions are run
  • Manage consignments from multiple sellers within one structured auction process
  • Run auctions under your own brand and domain, not someone else’s marketplace
  • Give bidders a consistent, first-party experience across registration, bidding, and post-sale activity
  • Maintain governance, reporting, and auditability as part of day-to-day operations

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.

Designed for professional auction operations

Multi-Seller auctions are where professionalism is tested most.

iRostrum is designed to support:

  • Clear seller onboarding and consignment workflows
  • Consistent catalogue presentation across sellers
  • Predictable settlement and aftersales handling
  • Oversight without micromanagement

This allows you to focus on running successful auctions, rather than firefighting operational issues.

How organisations typically evolve from here

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:

  • Offer greater autonomy to sellers
  • Introduce peer-to-peer listing models
  • Run multiple operating models side by side

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.

Looking to run auctions on behalf of multiple sellers?

Every multi-seller operation has its own commercial and operational nuances.

A demo is an opportunity to:

  • Discuss your seller model and consignment approach
  • Confirm whether the Multi-Seller model is the right fit
  • Explore how auctions could integrate with your existing website
  • Define clear next steps, including a tailored solution proposal

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.

Related operating models

Some organisations start with a Multi-Seller model and later evolve their approach.

 

Talk to us about your Multi-Seller requirements

Book a demo

“We’ve found iRostrum to give us significant advantages over the years and it has played an important role in establishing Maak as a leader in our field. The platform presents our sales to a very high standard, delivers an exceptional bidder experience, and gives us an intuitive, efficient way to manage consignments, cataloguing, and post-auction processes. Having full access to our data has also been critical in supporting client relationships and long-term growth.”

Frances Robinson, Maak