Vetted senior AI leaders, available 1 to 3 days per week. Most engagements run 3 to 12 months.
THE ROLE
A fractional Chief AI Officer takes on the strategic responsibilities of a full-time CAIO, but works with your company part-time. The typical engagement is 1 to 3 days per week over a defined period, usually 3 to 12 months.
The core scope covers AI strategy, model and vendor selection, evaluation and governance infrastructure, and connecting AI capability to commercial outcomes. A fractional CAIO is accountable for outcomes, not just a slide deck. They own the AI roadmap, sit in executive and board discussions, and align AI work with product, engineering, and the founder or CEO the same way a permanent hire would.
The distinction from a fractional CTO matters. A CAIO concentrates on AI as a capability and a product layer: which models to use, how to evaluate them, where governance and regulatory exposure sit, and how to turn pilots into production. A CTO with AI experience covers the full breadth of engineering leadership, of which AI is one part.
Most fractional CAIOs work with 2 to 3 companies in parallel, which means they bring pattern recognition from across the market. They have usually led AI or applied ML functions at growth-stage or enterprise companies, and can point to systems they have taken from validated use case to production rather than to a strategy that never shipped.
A fractional CAIO does not write production ML code. The role is leadership: they lead the people who build, set the standards for evaluation and safety, and make sure AI spend connects to a measurable result instead of scattering across pilots that never reach production.
THE DECISION
Two clear profiles and a pragmatic middle path if you are between them.
Hire Fractional When
Hire Fulltime When
Pragmatic Middle-Path
If you are between these two profiles, post-Seed but not yet at a 15-person AI org, or uncertain whether the role justifies a permanent seat, fractional is the lower-risk entry point. A good fractional CAIO will build the function, establish what good looks like for evaluation and governance, and help you define the full-time job description from the inside. When the time comes to hire permanently, they can run the process and hand over cleanly.
LIVE
Day rates for vetted fractional CAIOs in Europe typically range from EUR 1,400 to 2,800 per day, depending on seniority, domain specialisation, and engagement length. A typical 1-to-2-days-per-week engagement therefore costs roughly EUR 6,000 to 22,000 per month. Because qualified AI leaders are still scarce, rates tend toward the upper end. Longer engagements (6+ months) often come with a discounted rate.
Most engagements run between 3 and 12 months, often beginning with a short AI audit and a 90-day plan before settling into an ongoing arrangement. Shorter engagements (under 3 months) are usually framed as advisory. Longer engagements often transition into a hybrid role or hand over to a full-time hire that the fractional CAIO helps recruit and onboard.
Yes, that is the standard model. Most fractional CAIOs work with 2 to 3 companies in parallel and explicitly avoid direct competitors. Fractionista requires executives to disclose all active engagements to their clients as a condition of listing on the platform.
A fractional CAIO owns AI as a strategic capability part-time on an ongoing basis (typically 1 to 3 days per week, 3 to 12 months): strategy, model selection, evaluation, governance. A fractional CTO covers the full breadth of engineering leadership, of which AI is one part. An AI consultant delivers a fixed-scope assessment or recommendation but does not own outcomes, sit on your leadership team, or carry the roadmap into production.
Fractional executives on Fractionista typically specialise in one or two domains, with common examples including B2B SaaS, FinTech, HealthTech, deep tech, and regulated industries. When evaluating candidates, look for domain overlap with your business model and a track record of outcomes, not just tenure. Profiles show domain tags and availability so you can assess fit before reaching out.
Yes. Fractionista also covers CFO, CMO, CTO, COO, CPO, and other roles including Board Advisory across Europe.
Post a CAIO brief and match vetted candidates in our online portal. No retainer, no upfront fee.