Definition
In short: An online auction is a sale conducted over the internet where bidders compete remotely, either in real-time or over a set time window.
An online auction is an auction conducted entirely or partially through an online platform. Bidders participate remotely via web browser or mobile app. Online auctions can be timed (ending at a set time with no live auctioneer) or live simulcast (streaming a floor auction with real-time online bidding alongside in-person bidders).
How It Works
Auctioneers upload a catalog of lots — including photos, descriptions, and starting bids — to a platform like HiBid, LiveAuctioneers, or Proxibid. Bidders register, browse the catalog, and place bids from anywhere with an internet connection. Timed auctions run for a set window (typically 7-14 days) with staggered lot closing times and auto-extend features to prevent bid sniping. Simulcast auctions stream a live auctioneer while accepting online bids in real time. According to Technavio (2025), the global online auction market is growing at approximately 14% CAGR. Online auctions have expanded the bidder pool dramatically — a rural estate sale that might draw 40 floor bidders can reach 400+ online bidders across the country.
Related Terms
See also: Auction Platform, Simulcast Auction, Timed Auction. For platform setup details, read Complete Guide to HiBid CSV Imports.
Frequently Asked Questions
What is the best platform for online auctions?
The best platform depends on your market and volume.
HiBid dominates the estate and personal property auction space with the largest bidder network. LiveAuctioneers focuses on art, antiques, and collectibles with a more curated audience. Proxibid serves industrial, agricultural, and commercial equipment. Most auctioneers start with one platform and expand based on results. The key factors are bidder reach in your category, fee structure, and ease of catalog upload.
How do I set up an online auction?
Setting up an online auction requires: (1) choosing a platform and creating an auctioneer account, (2) photographing and describing every lot, (3) uploading the catalog via the platform's import tool (usually CSV or manual entry), (4) setting auction dates, starting bids, and buyer's premium, and (5) publishing and promoting the sale.
The most time-consuming step is cataloging — photographing and writing descriptions for hundreds of lots. AI cataloging tools can reduce this from days to hours. Gavelist generates descriptions from photos and exports directly to HiBid, LiveAuctioneers, and other platform CSV formats.
What is the difference between timed and live online auctions?
In a timed online auction, lots open and close at set times with no live auctioneer — bidders place bids on their own schedule over days or weeks.
In a live online auction (simulcast), a real auctioneer calls the sale in real time while online bidders compete alongside floor bidders via streaming video. Timed auctions are simpler to run and scale easily to large catalogs. Live online auctions create more urgency and excitement but require dedicated equipment and staff. Many estate auctioneers use both formats: timed for general household sales and simulcast for higher-value or specialty auctions. See also timed auction for format details.
Sources
- Technavio, "Online Auction Market Growth Analysis." technavio.com