Technology help for a growing company comes from several directions at once: IT consultants, software development agencies, cloud consultants, security assessors and solution architects from the vendors themselves. A fractional CTO is the person who decides which of them to hire, and holds them to what they promised.
What a technology consultant delivers
A consultant is hired for a defined piece of work. Common projects: an architecture review, a cloud migration plan, an ERP or CRM selection, a security assessment, a technical due diligence report or a scoping document for a new product. The deliverable is a report, a plan or a recommendation, and the engagement ends when it is accepted. Fees are fixed or hourly; a due diligence report or architecture review typically runs $5,000 to $25,000.
Development agencies are consultants of a different kind. Their deliverable is working software, and they are paid by the hour, the sprint or the project.
What a fractional CTO owns
A fractional CTO owns technical decisions on an ongoing basis. They set the architecture and change it as the business grows, approve vendor estimates, review the agency’s work, decide what to build and what to buy, hire engineers and answer to the CEO for whether technology spending produces results. Published fees run from about $3,000 a month for advice to $15,000 for an embedded role.
Who signs off
The consultant recommends and the CEO decides, often without the expertise to judge the recommendation. That is the core problem for non-technical founders. A fractional CTO decides within delegated limits: approving the agency’s sprint plan, choosing the hosting provider, signing off releases and spending up to a set amount. Write those limits down, and make the CTO the named owner of the company’s code repository and cloud accounts on your behalf.
When a consultant is enough
If you have a technical leader in-house who needs a second opinion or extra hands, hire a consultant. If the question is narrow and one-time, such as which accounting system to buy or whether a codebase is sound before an acquisition, hire a specialist for that. If you want a scoping document before you talk to development agencies, a short consulting project works.
When you need a fractional CTO
You need one when nobody inside the company can judge technical work. The signs: you pay a development agency every month and cannot tell whether the estimates are reasonable; your cloud bill grows faster than your customer count; you have bought two technical assessments and acted on neither; or engineers report to a founder who cannot review their work.
The agency CTO question
Development agencies often offer a fractional CTO as part of their service. The CTO knows the agency’s work and can move quickly, which helps. But a CTO paid by the vendor cannot independently assess the vendor’s estimates, quality or billing. If your main risk is the agency, hire an independent fractional CTO to oversee it. If your main need is speed and you trust the agency, the bundled CTO can work, with an independent review once or twice a year.
A common path
Many fractional CTO engagements start with a fixed-fee review: code, architecture, contracts and cloud spend. If the review shows ongoing work, it converts to a retainer. Ask for the review to end with an estimate of the monthly hours the follow-up work needs, so you can size the retainer against what a contractor or a full-time hire would cost.