Fractional CTO: what one does and when you need one

What a fractional CTO does

A full-time chief technology officer runs technology for a company: strategy, architecture, hiring, security and budgets. A fractional CTO does the same kinds of work for a fraction of the time and cost, usually for several companies at once. Fractional CTO services, sometimes sold as CTO as a service, are offered by independent consultants and by small firms.

Typical responsibilities include:

• Turning business goals into a technology roadmap and budget.
• Choosing between building, buying and low-code tools for each need.
• Picking the tech stack, hosting and architecture for a new product.
• Writing or reviewing requirements and requests for proposals.
• Evaluating and managing outside developers and agencies.
• Reviewing code, security and data practices.
• Interviewing and hiring the first developers or a full-time CTO.
• Representing the technology side to investors, buyers or auditors.

When you need a fractional CTO

• You are about to spend serious money on software and nobody on your side can judge the proposals.
• You have one or two developers and nobody senior setting direction or reviewing their work.
• Investors, a buyer or a large customer are asking technical questions you cannot answer.
• An existing system is struggling and you need an independent view on whether to fix, replace or rewrite it.
• You are hiring your first engineers and need someone who can interview them properly.
• Security, privacy or compliance requirements are growing and someone has to own them.

When you probably do not need one

A fractional CTO is not always money well spent. If you are buying off-the-shelf tools and need help setting them up, an IT consultant or the vendor’s support team is a better fit. If you are building one well-defined project with a development partner that already provides project management, technical planning and a clear process, a second layer of oversight may add cost without much benefit. And if technology is so central that you need someone thinking about it every day, you need a full-time CTO or a technical cofounder rather than a part-time one.

In between sits a common case: an independent fractional CTO for a few hours to review a proposal or a codebase before you commit. That kind of short engagement is often worth it even if you do not need ongoing help.

What to expect from a fractional CTO engagement

1. AssessmentThe first weeks are spent learning the business, the current systems, the team and the biggest risks.
2. Written planYou get a roadmap with priorities, rough budgets and recommendations on build, buy and hiring.
3. Regular rhythmMost engagements settle into set hours, such as a weekly meeting with the team and time for reviews.
4. Vendor and team oversightThey review proposals, estimates, code and progress from whoever is doing the building.
5. Reporting to youExpect short, plain updates on progress, risks and decisions that need your input.
6. A planned exitA good fractional CTO works toward the point where you hire a full-time leader or no longer need one.

Fractional CTO vs development partner vs full-time CTO

• Fractional CTO: strategy, oversight and decisions across the whole company, part time. Usually does not build the software.
• Development partner: designs and builds the software, often with its own project manager and technical lead planning the work on each project. Zoti, for example, gives every project a dedicated project manager and a full team that cover the technical planning for what it builds. That is not the same as company-wide technology leadership.
• Full-time CTO: owns technology every day and usually leads an in-house team. The right choice once software is central and there is enough work to fill the role.

How to choose a fractional CTO

Look for someone who has led technology at a company of your size or one stage ahead of you, not only at large enterprises. Ask how many clients they work with at once, how quickly they respond, and whether they earn commissions from any vendors or agencies they recommend. Ask for references from past clients, and agree in writing on hours, deliverables, confidentiality and how either side can end the arrangement. Pricing is usually a monthly retainer or an hourly rate and varies widely with experience and time commitment, so get a written proposal before you start.