// Glossary · fractional

Fractional CAIO

Also: fractional Chief AI Officer · AI executive on retainer

A part-time Chief AI Officer engagement that gives funded teams strategic AI direction without the cost of a full-time executive hire.

A fractional CAIO is a senior AI executive who runs your AI strategy on a part-time retainer instead of taking a permanent C-suite seat. Funded teams between 10 and 50 employees rarely justify a $300K loaded executive salary for one function, but they still need someone to decide what to build, what to buy, where the data lives, and which workflows go AI-first. The fractional model fits the gap. You get an executive with two decades of pattern recognition, a board-ready cadence, and direct hands on the systems for one to three days a week. The retainer is a fraction of a full-time hire and the upside is the same direction-setting that costs unfunded mistakes when nobody is doing it.

The work splits into three modes. First, strategy: the AI roadmap, what to centralize, what to leave to teams, the data architecture, the build-versus-buy calls that shape the next 18 months of output. Second, execution oversight: pairing with your existing leadership when an AI Sales Department or an AI Content Department or any vendor engagement needs an executive on the EOI side reviewing output. Third, board communication: the AI section of the board deck, the answers to investor questions about your AI moat, the framing of what is and is not real about your AI claims.

The fractional CAIO is the executive layer sitting above the departments. If you only run one department with us, you may not need one. The pull is when you run two or more, or when the company has positioned AI as a core differentiator to investors and needs a credible name on the org chart. Pair this with our broader AI consultancy engagement when the work needs a deeper AI strategy audit before any retainer starts.

// Examples
  • A 25-person Series A fintech retains a fractional CAIO for 6 hours a week to own the AI roadmap and review department outputs.
  • A pre-IPO services firm uses a fractional CAIO to draft the AI section of the next 4 board decks and field investor diligence questions.
  • A 40-person platform company books a 90-day CAIO engagement to settle the build versus buy decision on three different AI workflows.
// Common questions
How many hours a week does a fractional CAIO commit?
Typical engagements run 6 to 12 hours a week, split between weekly leadership review, monthly board prep, and async strategy work. Some scopes are heavier in the first 90 days while the roadmap is being built, then ramp down to maintenance cadence after the heavy decisions land.
Do I need a fractional CAIO if I already run an AI department with EOI?
Not always. One department on its own usually does not need executive layer. The CAIO becomes useful when you run two or more departments, when the AI strategy is investor-facing, or when build versus buy decisions across product and ops need a single owner.
How is this different from hiring a consultant?
A consultant delivers a deck and leaves. A fractional CAIO stays on retainer, sits in your leadership cadence, and owns outcomes for as long as the engagement runs. The relationship is operating, not advisory. You can call them on a Tuesday and get a decision before close of business.
When does it make sense to convert to a full-time CAIO?
When the AI function gets large enough that the work cannot fit into a part-time week, or when the role becomes investor-critical enough that a full-time named owner is the right signal. Typical conversion happens at the Series C stage or beyond. The fractional engagement bridges Seed through Series B comfortably.
// Related terms
// Ready to ship?

EOI runs fractional AI departments for funded teams under 50. Sales, Content, Ops, Support. Live in 14 days on a monthly retainer.

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