Who Owns Sedo? The 2026 Guide to the World's Biggest Domain Marketplace

The Short Answer: Sedo Belongs to United Internet

Sedo is owned by United Internet AG, one of Europe's largest internet companies and the group behind hosting brands like IONOS. Sedo itself — the name is short for "Search Engine for Domain Offers" — was founded in Cologne, Germany, in 2001, and has grown into the world's largest domain marketplace by listing count, with well over 19 million domains on offer at any given time. It operates from offices in Cologne and Boston, serving buyers and sellers in almost every country.

If Afternic is the American giant of the domain aftermarket, Sedo is its European counterpart — and for many investors, the two are the twin pillars of global domain distribution.

Why Sedo Matters for Domain Investors and Founders

Whether you are selling a portfolio or hunting for the right name for a new venture, Sedo's position in the market affects you:

• It is the largest single pool of aftermarket domains on earth, so buyers searching for an already-registered name will very often land there
• Its partner network syndicates listings to hundreds of registrars, putting your domain in front of buyers who never visit sedo.com directly
• Its auction events and parking program offer routes to value that fixed-price marketplaces don't
• Its European buyer base is the deepest of any marketplace — valuable if your domain suits an international audience

Understanding how Sedo works — and where it isn't the right tool — helps you place each domain where it will actually sell.

How Sedo Works

The Marketplace

The core of Sedo is a classic aftermarket marketplace: list a domain free of charge, set a buy-now price or invite offers, and negotiate through the platform. Buy-now listings can close quickly; make-offer listings give you room to negotiate but add time. Once buyer and seller agree on a price, Sedo's in-house Transfer Center holds the buyer's payment and walks both sides through delivery before releasing funds — an escrow-style process that removes most of the trust problem between strangers.

SedoMLS: The Partner Network

SedoMLS syndicates your listing to hundreds of partner registrars worldwide. A buyer searching for a taken domain at their registrar of choice can see your price and buy on the spot, sometimes without ever knowing Sedo brokered the deal. The reach is genuinely valuable — but sales through the partner network carry a higher commission, which is worth factoring into your pricing.

Auctions

Sedo runs themed and flagship auction events — GreatDomains is the best known — alongside seller-started auctions. Auctions suit domains with obvious, contested demand; for quieter names, a fixed price usually serves you better.

Parking and Brokerage

Sedo's parking program places ads on undeveloped domains and shares the revenue. Be realistic: parking income across the industry is a fraction of what it was a decade ago, and for most portfolios it's pocket money rather than a strategy. At the other end of the scale, Sedo's brokerage team negotiates high-value sales and acquisitions on your behalf for a commission.

What Does Selling on Sedo Actually Cost?

Listing is free — Sedo earns when you sell:

• Marketplace sales carry a commission of around 15%, with a minimum fee per sale. That minimum matters: on a low-value sale it can take a noticeably bigger bite than the headline percentage suggests.
• SedoMLS partner-network sales are typically charged at around 20%, the premium you pay for that extra distribution.
• Auctions and brokerage have their own schedules, generally in the same range.

Rates and minimums have shifted over the years, so always confirm the current schedule in your Sedo account before pricing a domain. As with any commission marketplace, build the fee into your asking price — a domain listed at €5,000 nets you meaningfully less after Sedo's share.

Is Sedo Legit and Safe?

Yes. Sedo has operated continuously since 2001 and is part of United Internet, a publicly traded company — it is one of the most established names in the industry, and its Transfer Center process protects both sides of a sale.

Two cautions, though:

• Watch for impersonators. A long-running scam involves fake "buyers" who insist you purchase a paid appraisal or certificate before they'll proceed — often steering you to a site dressed up to look official. Sedo never requires this. If a buyer demands a specific appraisal service as a condition of sale, walk away.
• Secure your accounts. The marketplace is safe; a hijacked registrar or marketplace account is not. Use two-factor authentication everywhere your domains live.

Sedo vs Afternic vs Dotto: Where Does Each Fit?

These platforms solve different problems, and pretending one wins outright would be doing you a disservice:

• Sedo offers the largest listing pool, the deepest European reach, auctions, and parking. If your domain has international appeal — especially a .com or a European country-code — Sedo belongs on your list.
• Afternic, GoDaddy's marketplace, counters with its Fast Transfer network and unmatched syndication into the US registrar ecosystem. Serious sellers often list on both; we've written a full breakdown in our guide to Afternic and GoDaddy's ownership.
• Dotto takes the opposite approach to both: a curated marketplace rather than an open one. Every domain is hand-selected and presented as a complete brand — logo concepts, a business plan, and brand assets generated for each listing — so buyers browse finished ideas, not endless spreadsheets of names. Payment plans and a managed transfer process are built in.

Scale versus curation is the real choice. A liquid .com benefits from Sedo's and Afternic's enormous reach. A brandable domain that needs to be seen properly to sell — and almost any Australian domain — does better where it's showcased rather than buried.

A Note for Australian Sellers: .au Domains Play by Different Rules

Sedo's strength is global TLDs and European country codes. If you hold .au or .com.au domains, think twice before defaulting to an international marketplace:

• .au extensions are governed by auDA rules, and transfers follow a different process from gTLDs — the automated transfer systems international marketplaces rely on generally don't apply
• Australian buyers searching for a local domain overwhelmingly start with local channels, not a German marketplace
• Pricing in euros adds friction for an audience that thinks in Australian dollars

This is exactly the gap Dotto was built to fill: an Australian marketplace that understands the local aftermarket, presents .com.au and .au domains properly, and manages the transfer end to end. If you're still weighing up which extension suits your brand, our guide to the seven original top-level domains is a good place to start.

Where Sellers Trip Up

The most common Sedo mistake is the quietest one: listing the same domain at different prices on different marketplaces. Buyers comparison-shop, and a price mismatch reads as either carelessness or a bait — both kill trust at exactly the moment you need it.

Pricing errors come next. Sellers forget the minimum commission when listing low-value domains, or forget that a partner-network sale through SedoMLS carries the higher rate, and then wonder why the payout looks thin. Run the numbers for both channels before you set a price, not after the sale closes.

And then there's neglect. A listing with no buy-now price, no description, and no category is functionally invisible — buyers filter it out without ever seeing it. The same goes for parking a genuinely premium domain and hoping ad revenue justifies the hold; it almost never does. If a name is good enough to keep, it's good enough to present properly.

What Experienced Sellers Do Differently

• Price decisively. Buy-now listings consistently outperform make-offer-only listings for mid-range domains; most buyers won't open a negotiation, but they will click a fair price.
• Use both giants for liquid .coms. Listing on Sedo and Afternic together costs nothing upfront and roughly doubles your syndication footprint — just keep prices identical.
• Match the marketplace to the domain. International reach for international names; local presentation for local names. A .com.au listed only on Sedo is a domain hidden from its real buyers.
• Revisit your floor prices yearly. The market moves — what was a fair price in 2024 may be leaving money on the table in 2026.

Frequently Asked Questions

Who owns Sedo?

Sedo is owned by United Internet AG, the German internet group that also owns hosting brands such as IONOS. Sedo was founded in Cologne in 2001 and remains headquartered there, with a second office in Boston.

Is Sedo free to use?

Listing domains is free. Sedo earns a commission when a domain sells — around 15% for marketplace sales (with a minimum fee) and around 20% for sales through the SedoMLS partner network.

What is SedoMLS?

SedoMLS is Sedo's syndication network. It distributes your listing to hundreds of partner registrars so buyers can purchase your domain directly where they already manage their names.

Does Sedo handle the domain transfer?

Yes. Sedo's Transfer Center holds the buyer's payment, guides both parties through the transfer, and releases funds to the seller once the domain has been delivered.

Can I sell .com.au domains on Sedo?

You can list them, but .au extensions follow auDA's transfer rules and most of Sedo's buyer traffic is international. Australian sellers are often better served by a local marketplace such as Dotto, where buyers are specifically looking for Australian domains.

Find Your Next Domain the Curated Way

Sedo earned its place as the world's biggest domain marketplace, and for globally liquid domains it deserves a spot in every seller's toolkit. But biggest isn't always best — especially for brandable names and Australian extensions, where presentation and local knowledge close sales that raw scale can't.

Ready to see the difference curation makes? Explore Dotto's hand-picked premium domains — each one presented as a complete brand, ready to launch.