Fractional CTO vs agency vs freelancer: who should own your tech? (UK 2026)

Fractional CTO, agency or freelancer? Who should own the tech for a UK founder in 2026: roles, UK day rates, IP ownership and a decision guide.

Last checked 23 October 2026. Third-party figures are median contractor day rates from IT Jobs Watch vacancy data, not fees quoted by fractional CTO firms. Magora prices are in pounds and exclude VAT.

Our cost comparison of vibe coding, freelancers and agencies answers “what will it cost to build?”. This article answers the question underneath it: who is responsible for the technology when you are a founder without a technical co-founder, and your app was either built with AI tools or is still an idea.

Fractional CTO vs agency vs freelancer: what is the difference?

The difference is accountability, not hourly price. A fractional CTO is paid for judgement. An agency is paid for an outcome. A freelancer is paid for hours of a specific skill. The table puts them side by side.

What does a fractional CTO actually do?

A fractional CTO acts as your technical decision-maker on a part-time basis. In practice that means choosing the architecture, writing or checking the brief for developers, reviewing the quality of what suppliers deliver, helping you hire, and answering investors’ technical questions. The model suits a company that needs a CTO’s judgement but cannot yet justify, or find, a full-time one.

Three things are worth knowing before you buy.

• It is a role, not a standard product. There is no regulated definition of a “fractional CTO” or “CTO as a service”. Scope, hours and fees vary by provider, so write down what you are getting: days a month, deliverables, and whether the person will review code.
• Price evidence is thin. We searched for a credible published UK survey of fractional CTO fees and did not find one, so we do not quote a monthly figure. The closest public data is contractor vacancies. IT Jobs Watch reports a median Chief Technology Officer contract day rate of £630 in the UK for the six months to 23 October 2026, but that rests on only 10 quoted rates (10th–90th percentile £596–£801) and was £900 a year earlier. For Head of Engineering the median is £700 (29 rates), and for Solutions Architect £625 (1,250 rates). These are full contract roles, not fractional retainers, so treat them as a guide to the market, not a quote.
• Someone still has to build. Our arithmetic, not a market claim: one day a week of a CTO at £630 is roughly four days, or about £2,500, a month before a single developer is paid. That can be good value when the alternative is a bad hiring decision, and poor value for an app that needs no strategic decisions.

When does an agency make more sense?

When you want one party to own both the technical decisions and the delivery. An agency does not replace a CTO for a company that will grow its own engineering team, but for a first product it often removes the need for one.

Here is what Magora publishes today, and what it does not. We do not sell a “fractional CTO” package and have no published price for one. What we do offer is close to the same judgement, delivered as part of a project:

If you already have an AI-built app, our MVP page says we start with a code and architecture review, tell you plainly what can be kept, and fix what blocks launch or growth first. We have not published a price for that review, so ask. The Discovery sprint from £3,000 is the published entry point.

The honest trade-off: an agency’s advice comes with an interest in the build. A fractional CTO has no such interest, which is exactly why some founders pay for one to review agency quotes. Both are legitimate; just know which one you are buying. Our guide to choosing an agency lists the questions to ask, including who writes the code and whether the engineers are in-house.

When is a freelancer enough?

When the work is small, well defined and you can review it, or someone you trust can. IT Jobs Watch reports a median software developer contract day rate of £525 in the UK for the six months to 23 October 2026 (253 rates quoted; 10th–90th percentile £367–£618). That buys skill, not leadership: a freelancer will build what you specify, but deciding what to specify, and checking the result, is the CTO job you have not filled.

Ownership needs care. GOV.UK guidance says a person working under a contract for services will usually retain copyright in the works they produce, and that for commissioned work the first owner is the creator unless you agree otherwise in writing. Sign a written assignment of the code to your company, and take repository access from day one. Ask also what happens to the knowledge if they stop working with you.

What if my app was built with AI tools?

Then your first need is review, not more building. A prototype made with Lovable, Bolt, Replit, Cursor or Claude Code can prove demand, but nobody has yet checked its security, data handling or whether it can take paying users. That is a technical-judgement job. The cheapest first move is to have someone independent look at it, which could be a fractional CTO, an agency review or a Discovery sprint. Our checklist for AI-built apps lists what typically breaks, and this guide covers launch preparation for non-technical founders.

Which should I choose? A decision guide

These are our criteria, not a formula, and the options combine well. A common pattern is a fractional CTO to set the plan and review quotes, then an agency or team to build, then a full-time hire once the product justifies one.

What should I ask before signing with any of them?

• Who owns the code and IP, and in writing? Your company should, from payment or sooner.
• Who has access to the repository, hosting and app-store accounts? These should be in your name.
• What exactly will I receive each month? Hours, deliverables and a named person.
• Who reviews the work? If the answer is nobody independent, add that role.
• What happens if you leave? Ask for documentation and a handover period.
• Is there a conflict of interest? A CTO who is paid by the supplier they recommend is not independent advice.

What should I do next?

Write down what you cannot judge today: architecture, security, hiring, supplier quotes or investor questions. That list tells you whether you need leadership, a team or a pair of hands. To get a first number for a build, use the app cost calculator. Or send us your brief and we will build a free coded prototype of your core idea in 5–10 working days, or start with a two-week Discovery sprint from £3,000. Get a free prototype or book a call.

FAQ: fractional CTO vs agency vs freelancer

What is a fractional CTO?

A part-time technical leader who makes architecture, hiring and supplier decisions for your company for a set number of days a month. Most do not build the product themselves, so you still need developers or an agency.

How much does a fractional CTO cost in the UK?

We could not find a credible published UK survey of fractional CTO fees, so we do not give a monthly figure. For reference, IT Jobs Watch reports a median CTO contract day rate of £630 for the six months to 23 October 2026, based on only 10 quoted rates. Ask providers for a written scope and price.

Is CTO as a service the same as a fractional CTO?

The terms are used interchangeably, and neither has a standard definition. Some providers bundle development with the leadership; others sell leadership only. Check which one you are buying.

Does Magora offer a fractional CTO service?

Not as a separate published product. Magora offers a Discovery sprint from £3,000 with a senior Product Owner and Solution Architect, and dedicated teams with a tech lead or Product Owner, from £49/hour per developer. A free 30-minute call with a senior software architect can be booked to discuss your situation.

Should I hire a freelancer or an agency for my first app?

A freelancer suits a small, well-defined task you can review. An agency suits a first product where you want one party responsible from idea to live service. Whichever you pick, make sure your company owns the code in writing.

I built my app with Lovable or Cursor. Who should look at it first?

Someone independent of the person who will fix it: a fractional CTO, an agency code and architecture review or a Discovery sprint. The aim is a written view of what can be kept and what blocks launch.