Technology Domain Names
Browse 36 technology domains from just £13.99/yr. Free DNS management, email forwarding, and 10GB mailbox included with every domain.
Technology Domain Names
Technology domains have become essential for startups, developers, and digital businesses. Extensions like .io, .dev, .app, and .tech are recognised across the global technology community as markers of innovation and technical expertise. They carry a modern, forward-thinking identity that resonates with tech-savvy audiences.
The .io extension has emerged as the de facto standard for tech startups and developer tools, whilst .dev (managed by Google) enforces HTTPS by default for enhanced security. For broader web presence, extensions like .net, .online, .site, and .website offer versatile alternatives that work well for technology companies and digital services of all kinds.
At 365i, we understand the technology sector's need for speed and reliability. Our domain registration is fast, our DNS infrastructure is reliable, and all registrations include free DNS management and email forwarding. Whether you are launching a SaaS platform or building a developer portfolio, we have the right extension for your project.
Choosing between .io, .ai, .dev, .app and .tech
Almost nobody choosing here is picking from all thirty-six. The shortlist is nearly always .io, .ai, .dev, .app and .tech, and the first thing to know is that two of those are country codes in technical costume. .io belongs to the British Indian Ocean Territory and .ai to Anguilla. Both are open to anyone, and both are the dearest options on this page by a wide margin.
.io reads as infrastructure: an API, a CLI, a platform other developers build on. .ai names a field rather than a product, so it fits when the model is what you sell and overstates you when it is not. Software with a chat box bolted on is not an .ai business, and the renewal will say so every year.
The Google extensions carry a rule
.dev, .app, .page and .ing come from Google's registry arm and sit on the HSTS preload list. Google's own wording is that this makes "HTTPS required on all connections", and there is no opting out: browsers refuse plain HTTP on those extensions and a domain cannot be removed from the list. Useful if you are shipping software, awkward if you meant to park the name somewhere with no certificate. Every 365i hosting plan includes a free SSL certificate, so install it before you point the domain and you will never meet the problem.
The rest of the category is descriptive words: .cloud, .tech, .digital, .online, .site, .space. Cheaper, and they read as reasonable, but a word extension only earns its keep when it finishes the name rather than labelling the sector. ledger.software says something. ledger.tech mostly fills space.
If your customers are in the UK and find you through Google, the .co.uk still does more for you than any of these. Take the technical extension for the product, keep the .co.uk for the company, and point one at the other.
What we would suggest
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A developer tool, API or CLI
.devBrowsers force HTTPS on every .dev address, so your docs and endpoints can never be reached over plain HTTP. It renews for a good deal less than .io while reading as more deliberately technical.
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An app you list in the stores
.appThe word does the explaining before anyone clicks, which matters when the address sits in a store listing or a deep link. The same preloaded HTTPS rule applies, so a download page cannot be served insecurely.
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A funded startup naming its product
.ioShort, unhyphenated names are still there where the equivalent .com went twenty years ago, and a technical audience reads .io as infrastructure rather than as a compromise. Budget for the renewal, because it is one of the dearest here.
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A product where the model is the product
.aiIt is the only extension in this category that names the field itself, which is exactly why it carries the highest price on the page. Take it when machine learning is what you sell, not when it is a feature you added.
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A managed service or hosting platform
.cloudIt describes what you sell to a buyer who may not be technical, and it sits at the affordable end of this category rather than alongside .io and .ai. Easy to say down a phone line, too.
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A UK firm whose customers search from the UK
.co.ukGoogle reads it as a UK signal, which none of the technology extensions provide, and it renews for a fraction of them. Take the .io or .dev for the product if you want it, and keep this as the company address.
Available Extensions
Browse all 36 technology domains from £13.99/yr. All prices exclude VAT.
Mistakes we see with technology domains
Worth reading before you register, because most of these cost money to undo.
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Picking the extension on the word and meeting the price at renewal. This category has the widest spread on the site: .hosting is £375 a year while .link is under £14, and that gap is set by the registry, not by us.
Do this insteadOpen the extension's own page and check the annual price before you register, then multiply it by the number of years you expect to trade. A domain is a bill that repeats, not a one-off purchase.
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Registering a .dev, .app, .page or .ing and pointing it at hosting with no SSL certificate. Browsers will not load those extensions over plain HTTP, and the domain cannot be taken off the preload list, so the site simply refuses to appear.
Do this insteadInstall the certificate first, then change the nameservers. Every 365i plan includes a free SSL certificate; raise a ticket and we will confirm it is live before you switch the domain over. The desk is staffed seven days a week, evenings and bank holidays included.
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Treating .aero as an open technology extension because aviation software sounds like a fit. It is sponsored by SITA and restricted to the civil aviation community, so a registrar cannot take the order until you hold an Aviation Community Membership ID.
Do this insteadApply to SITA for the Membership ID before you order anything. The registry says it is issued within two working days once your eligibility is established. If your drone or airspace product falls outside their definition of the aviation community, .systems or .tech will not turn you away.
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Registering the .io or .tech and never the matching .co.uk, then finding somebody else holds the address UK customers type out of habit.
Do this insteadRegister the .co.uk alongside it on day one and redirect it at the main site. It costs a few pounds a year and it closes the door permanently.
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Choosing a name you cannot give out over the phone. .io, .ai and .xyz all get mis-heard, and anyone not looking at a screen will default to .com whatever you said.
Do this insteadRead the full address aloud to somebody who has never seen it written down. If they cannot type it correctly first time, that cost lands on every call you take and every card you print.
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Buying .mobi for a mobile site. It arrived in 2005, when phones needed their own cut-down version of a page, and responsive design retired that problem years ago. A .mobi now reads as a site nobody has touched in a decade.
Do this insteadBuild one responsive site on a single domain. If you want a short address for a poster or a QR code, register .link or .page and point it at the same site.
Included with Every Technology Domains Registration
DNS Management
Full DNS zone editor to manage A, CNAME, MX, TXT, and all record types.
Email Forwarding
Set up professional email addresses and forward to any inbox.
Auto-Renewal
Never lose your domain with automatic renewal protection.
Free 10GB Mailbox
One 10GB mailbox (POP3/IMAP) included with every domain, on any TLD.
Technology Domains FAQ
The .io extension is currently the most popular choice for technology startups, followed by .com and .dev. However, the best choice depends on your brand, budget, and target audience. A memorable name matters more than the extension itself.
Yes. The .dev extension is on the HSTS preload list, which means browsers will only connect to .dev domains over HTTPS. You will need an SSL certificate installed on your hosting, but this is standard practice and included free with all 365i hosting plans.
Technically, .io is the country-code TLD for the British Indian Ocean Territory. However, it has been widely adopted by the technology community and is primarily used as a generic tech domain. It functions identically to other generic extensions.
Absolutely. There are no restrictions on what content you can host on most technology domains. However, visitors may have certain expectations when they see a .tech or .io address, so consider whether the extension aligns with your brand message.
Google has stated that newer generic TLDs like .tech, .io, and .dev are treated equally to .com in search rankings. The most important SEO factors remain your content quality, site speed, and backlink profile rather than the extension itself.
No, and no retirement process has started. The IO code is still assigned in ISO 3166-1, the standard ICANN follows for country codes, and ICANN addressed the question directly in November 2024: if IO were ever withdrawn from that standard, its published retirement policy opens a five-year window to phase the domain out, and that window can be extended. Registrations and renewals are running normally. The sensible advice has not changed either. If the address needs to outlive a decade of politics, register the matching .co.uk or .com beside it and redirect one at the other.
Yes, because the HTTPS rule on those extensions applies to web browsers only. HSTS is an HTTP mechanism: it governs how a browser connects to your website and has no bearing on MX records, SMTP or mail delivery. Email on a .dev or .app behaves exactly as it does on a .co.uk. Every domain registered with us includes free DNS management, email forwarding and one free 10GB mailbox, so you can run mail on the name without buying anything else. The website side still needs its certificate.
Length, price and how the name reads. .tech is shorter, better known and costs more per year; .technology is the full word and sits lower down our price list. The more useful difference is grammatical. .tech labels a sector, while .technology can finish a company name, so kettering.technology reads like a firm and kettering.tech reads like a landing page. Take .tech if the brand is the whole name and you want it short. Take .technology if you want the extension doing the second half of the work.
Register your technology domains today
Choose from 36 technology domains from just £13.99/yr. Free DNS management, email forwarding, and 10GB mailbox included.
