What is the difference between a CIO and a CTO?

A Chief Information Officer owns the technology that keeps the organisation operating: the core systems, the networks, the data, the cyber posture, the supplier contracts and the IT teams behind them. A Chief Technology Officer owns the technology the organisation creates: the product, the engineering function, the technical architecture and the roadmap that customers pay for. The CIO is inward facing and runs the engine room. The CTO is outward facing and builds the product. When a company has both, the CIO keeps the lights on and the data safe while the CTO ships the thing that earns revenue. When a company has neither, those two jobs do not disappear, they just land on a founder or a finance director who has no time for them. Our fractional CIO and CISO service exists precisely for businesses that need the CIO half of that picture without a full time hire.

What a CIO actually does

The CIO is accountable for whether your business can function on a Monday morning. That means the operational systems, the integrations between them, the data that flows through them and the people who keep them running. It also increasingly means security and risk, because in a mid-market company there is rarely a separate security chief, so the CIO carries cyber governance, compliance and resilience too. A good CIO sets IT strategy that the board can read, controls technology spend, and turns a sprawl of tools into a coherent estate. The work is unglamorous and it is the difference between a company that scales smoothly and one that lurches from outage to outage. If the CIO role in your business is sitting empty, our page on the interim CIO leadership gap covers how that vacancy gets filled fast.

What a CTO actually does

The CTO owns the product technology and the engineering organisation that produces it. The job is architecture, technical direction, build versus buy decisions, developer hiring and the roadmap that ties engineering effort to commercial outcomes. In a software company the CTO is one of the most important hires you will make, because the product is the company. In a business where technology supports operations rather than being the product, a full time CTO is often the wrong hire and an expensive one. The mistake to avoid is appointing a brilliant engineer to a CTO title and then asking them to negotiate Microsoft licensing and run a cyber audit, work that belongs to a CIO and that most CTOs neither enjoy nor do well.

Where the two roles overlap and where they clash

The overlap is real. Cloud infrastructure, data platforms, security and architecture all sit in the contested middle ground, and in smaller companies one person covers both. The clash shows up when nobody has decided who owns what. Security is the classic example: a CTO focused on shipping features will deprioritise the controls that a CISO or CIO would insist on, and the gap stays invisible until something goes wrong. The cost of getting it wrong is not theoretical. The IBM Cost of a Data Breach Report 2025 puts the global average breach at USD 4.44 million, and UK regulators have shown they will act, with the ICO fining British Airways £20 million in 2020 and Interserve £4.4 million in 2022. Clear ownership of cyber risk is exactly what our board cyber governance work establishes, and where dedicated security leadership is needed, our CISO as a service and virtual CISO options fill it without a permanent hire.

Cost: what each role really costs you

A permanent CIO or CTO at the right calibre is a six figure salary before bonus, equity, recruitment fees and the cost of getting the hire wrong. For comparison, a UK CISO salary alone runs roughly £95,000 to £600,000 or more depending on sector and scope. For most mid-market and PE-backed businesses the question is not whether senior technology leadership is worth that, it is whether you need it five days a week. Usually you do not. You need the judgement, the board presence and the decisions, which is a fraction of a full time week. That is the case for fractional and interim leadership, and you can model the difference directly with our CIO and CISO cost calculator or read how engagements are priced on our pricing page.

Which one do you need: a verdict

If your company sells software and the product is the business, hire a CTO, full time, and make it a priority. If your company uses technology to run operations, sell services or manage a complex estate, you need a CIO, not a CTO, and you almost certainly do not need that CIO five days a week. A great many businesses appoint a CTO when what they actually have is an operations and security problem dressed up as a product one. For a PE-backed business mid hold, the sharpest move is fractional or interim CIO leadership that owns the estate, the data, the cyber risk and the integration agenda, with security folded in. Where the deal thesis depends on technology, our technology due diligence and mid-market digital transformation work sits alongside that leadership. Starkhorn frequently provides more than one of these roles under one person: CIO and CISO judgement combined, which is exactly what a leaner business needs and rarely gets from a single permanent hire. See our vCIO service for how that works in practice.

Why Starkhorn

Starkhorn is led by Daniel J. Jacobs, who has spent over 20 years in technology and security, 15 of them in leadership roles, including Interim Group Technology Director at VetPartners, the BC Partners-backed veterinary group, and CIO and CISO at Jardine Motors Group. He is the author of The Strategy Bridge and holds PRINCE2, ITIL Foundation and full membership of the Institute of Interim Management.

Having held the CIO and CISO roles together at Jardine Motors Group and run group technology at a private equity-backed group, Daniel has lived the exact decision this page describes, knowing when one person should carry both remits and when the roles must be split. Our cyber security consulting draws on the same experience.

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