.com vs .io, .ai and .co for B2B Software

Oct 6, 20267 min readBy Rovaryn Digital

You have a name you like. The .com is taken or priced beyond your budget, and the .io, .ai or .co is free for the price of a normal registration. For a lot of B2B founders that looks like an easy call. It might be. But the three endings are not interchangeable with .com, or with each other, and the differences show up in places founders rarely check: who sets the price, what happens at renewal, and where your email goes when a buyer types the name from memory.

What .io, .ai and .co actually are

All three are country-code top-level domains (ccTLDs), not generic ones like .com. Each is delegated to a specific place, and IANA's root zone database lists who manages it:

.io is delegated for the British Indian Ocean Territory, with Internet Computer Bureau Limited as the manager.
.ai is delegated for Anguilla, with the Government of Anguilla as the manager.
.co is delegated for Colombia, with Colombia's Ministry of Information and Communications Technologies (MinTIC) as the manager.

.com, by contrast, is a generic TLD run by Verisign under a registry agreement with ICANN. That difference matters for pricing, which we come back to below.

The tech industry adopted these endings for their meaning in English, not their geography: "io" reads as input/output, "ai" as artificial intelligence, "co" as company. None of that is official. The registry rules come from the country or territory, whatever the ending happens to suggest.

What Google does with them

A common worry is that a country code will make Google treat your site as local to that country. For these three, it doesn't. Google's guide to managing multi-regional sites says ccTLDs normally give "a strong signal" that a site is meant for one country. It then lists a set of ccTLDs it treats like generic domains, because "users and website owners frequently see these more generic than country-targeted." .ai, .io and .co are all on that list.

So a B2B site on .io is not geotargeted to the Chagos Islands. Search is not a reason to avoid these endings, and it is not a reason to choose .com either. The ending does not give you a ranking advantage.

Trust and typing habits

Search may not care, but people do. When a buyer hears a company name on a call or sees it on a trade-show badge, many will assume .com and type it that way. If someone else owns the .com, some of those visitors, and some emails sent to your staff, end up with whoever holds it.

We can't give you a reliable percentage for how often that happens, and you should be wary of anyone who quotes one confidently. The pattern is easy to test yourself, though: ask five people outside your industry to email you at your company name, without spelling out the domain, and see what they type.

How much this matters depends on the buyer:

Developer tools and AI products sold to technical buyers: .io and .ai are familiar. A developer is unlikely to read either one as a warning sign.
Operational B2B software sold to plant managers, office administrators, finance teams or trades: .com is the default assumption. A non-.com ending may need spelling out on every call, invoice and email signature.
.co has a particular weakness. It is one letter short of .com, so a buyer who types the wrong ending lands on the .com. Your traffic and mail can leak to the .com's owner without anyone typing a different name.

This is one reason we run every Rovaryn product on a .com address. Most of them sell to operators in specialized trades and functions, not to developers, and that audience types .com by habit.

Price: registration, renewal and who sets it

This is where the endings differ most, and where the cheap option can turn out to be the expensive one.

.com pricing is capped by contract. Under the .com registry agreement, ICANN's decision paper on Amendment 3 allows Verisign to raise the wholesale price by up to 7% in each of the final four years of every six-year period. ICANN's published .com fee schedule set the wholesale fee at $10.26 a year from September 1, 2024, and Verisign has announced an increase to $10.97 from November 1, 2026. Registrars add their own margin on top, but for a standard .com, renewals are predictable.

ccTLD pricing is set by each registry under its own policy. ICANN's registry agreements cover generic TLDs, so the .com price cap does not apply to .io, .ai or .co. Each ccTLD's manager sets its own terms. In practice:

Prices vary by registry and registrar, and each registry can change them. Compare the current renewal price for each ending at your registrar.
Some registries add minimum terms. Registrar documentation, such as Dynadot's .ai help page, states that .ai requires a minimum registration or renewal term of two years. You pay for two years at a time.
A name a registry classes as "premium" may carry a premium renewal fee, not just a premium first-year price. Check the renewal line before you buy, not the registration line.

An aftermarket .com is a one-time price, then a normal renewal. When you buy an existing .com, the large number is the purchase price. After the transfer it renews at the standard .com rate. A premium ccTLD bought from a registry can work the other way: an affordable first year followed by a high renewal every year.

An illustration

Round numbers, for illustration only. Say you are comparing two options for the next ten years:

Option A: a .com bought on the aftermarket for $10,000, then renewed at roughly the standard .com rate, about $15 a year at retail. Ten-year total: around $10,150.
Option B: a registry-premium .ai with a first registration of $500 and a premium renewal of $900 a year (charged two years at a time). Ten-year total: around $9,000.

The totals end up close. The difference is that Option A's cost is fixed once you have paid, while Option B depends on a registry that can change its prices, and you have to keep paying it for as long as you want the name. Your real numbers will differ. The point is to compare the ten-year cost, not the first-year price.

For more on why aftermarket .com prices are what they are, see Why Premium Domains Cost What They Do.

Policy risk: the .io question

Because ccTLDs follow geography, politics can reach them. The UK and Mauritius signed an agreement on May 22, 2025 to transfer sovereignty of the British Indian Ocean Territory, the territory .io is delegated for, to Mauritius. That has raised questions about the long-term future of .io.

The process is slow and well defined. Under IANA's ccTLD retirement procedure, retirement is triggered when a country or territory is removed from the ISO 3166-1 standard. The default period from the notice of removal to retirement is five years, and extensions can stretch it to a maximum of ten. Nothing happens to .io overnight, and its future may be settled without retirement at all. But it is a risk that a .com does not carry. If you plan to run a company under one name for decades, take it into account.

Disputes and trademarks

If someone registers your brand under another ending, you will want a way to recover it. All three ccTLDs have dispute procedures through WIPO: .co has adopted the UDRP, .io uses a slightly modified version of the UDRP, and .ai is among the ccTLDs on WIPO's ccTLD dispute service. The UDRP also applies to .com.

The practical point is about defense, not rules. If you build on .io and someone else owns the .com, you can't control what appears there. The domain itself may be a legitimate registration that no dispute process would hand to you. This is general information, not legal advice. If a name matters to your business, talk to a trademark lawyer before you commit.

When a non-.com is fine

A non-.com is a reasonable choice when most of these are true:

Your buyers are technical and already use .io or .ai tools every day.
You have checked who owns the .com, and it is parked, unused, or clearly unrelated, not a competitor or something you would not want your name confused with.
You have checked the ten-year renewal cost, not just the first-year price.
Most of your traffic comes from links, ads and search results people click, not from names they type from memory.
You are comfortable with the registry's rules and, for .io, the policy question above.

A .com matters more when:

You sell to non-technical operators who assume .com.
Your name will be said aloud a lot: phone sales, referrals, trade shows, radio.
Email deliverability and misdirected mail would cause real problems, as in billing, compliance or customer support.
You expect to grow into more products or markets and want a name that does not depend on one ending's meaning.

Many companies start on a non-.com and buy the .com later. That works, but the .com usually costs more once your brand is visible, because the owner can see you need it.

What a .com costs in practice

Exact-match and coined .com names are not limited to the very top of the market. A few examples from our list for software and data companies:

You can browse the full software and development and AI and data analytics categories, or the full list at /domains. Each has a fixed listed price. Purchases complete on Atom.com, with payment and an escrow-backed, guided transfer that typically takes one to three days, and lease-to-own and payment plans are available there.

The short version

.io, .ai and .co are legitimate, search-neutral choices for B2B software, especially for technical buyers. They are not cheap .com substitutes. Each is a country code with its own registry, its own pricing, and, for .io, its own policy risk. Compare ten-year costs, check who owns the .com, and think about how your buyers will type your name. If you have a question about a specific name on our list, get in touch.