Senior tech leadership without the full-time cost.
Fractional CTO services from Millennial AI. Tech strategy, architecture decisions, AI integration, vendor evaluation, and team structuring without a full-time hire. $5-$10K/mo.
The Problem
Most technical decisions fail because nobody senior was in the room.
Architecture gets decided by whoever is loudest: Without a CTO, technical direction gets set by whoever builds fastest or argues most confidently. Monolith vs microservices, cloud vendor, database architecture: these are business decisions with cost structures that compound for years. A senior review at the right moment changes the outcome.
AI initiatives get handed to the wrong person: The engineer who knows Python best is not the person to evaluate whether an LLM, a fine-tuned model, or a rules-based system fits a given problem. AI integration spans model selection, infrastructure cost, latency, data governance, and failure modes. Plenty of companies don't have that person in-house.
Vendor contracts get signed without scrutiny: SaaS and AI platform vendors make their pricing look straightforward until you're 12 months in with a data portability problem, a usage-based bill you didn't model, or a compliance clause your legal team missed. Most non-technical founders sign these contracts without knowing what questions to ask.
A full-time CTO hire doesn't make sense yet: A credible full-time CTO costs $150-$300K per year plus equity. At Series A or earlier, that's hard to justify unless you have 20+ engineers. Before that point, you need senior judgment on demand. The fractional model covers that gap.
Our Approach
Monthly retainer, predictable scope, direct access. A fractional CTO engagement with Millennial AI runs as a monthly retainer. Hours go toward what's live in your roadmap, not reporting.
Phase 1 — Onboarding and technical audit (First 2 weeks): We review the existing technical environment: the code and the decisions behind it. Architecture review, vendor contract audit, data infrastructure mapping, technical lead interviews. The goal is a working model of your system so our guidance fits your actual setup, not generic best practice. Deliverable: Technical assessment: architecture map, vendor dependency tree, key risks, and decisions that need senior review
Phase 2 — Active advisory (Ongoing (5-25 hrs/month depending on tier)): Hours go toward whatever matters most: reviewing architecture proposals before your engineers build them, evaluating vendor demos and contracts, guiding AI integration, joining hiring panels, or advising leadership on tech decisions. Available via async review and scheduled calls. Async response within 24 business hours. Deliverable: Documented decisions, architecture review notes, and written recommendations for major calls
Phase 3 — Quarterly review and roadmap sync (End of each quarter): Once a quarter, we step back and review what's been built, whether the architecture tracks toward your growth plan, where technical debt has built up, and what the next quarter's big decisions will be. Designed for your leadership team and engineering leads. Deliverable: Quarterly technical health report with a prioritized list of architecture and infrastructure decisions for the next 90 days
Deliverables
Onboarding (First 2 weeks)
- Technical assessment covering architecture, vendor dependencies, data infrastructure, and near-term risks
- Prioritised list of decisions that need immediate senior review
Monthly Retainer
- 5-25 hours of senior advisory time on your active technical agenda
- Architecture review notes and written recommendations for major decisions
- Vendor evaluation and contract review support
- AI integration roadmap tied to your stack and data environment
- Hiring panel input for senior technical roles
Quarterly
- Quarterly technical health report with roadmap and architecture assessment
- Prioritised decision log for the following 90 days
Who This Is For
Right for you if: You're a founder or CEO at a Seed to Series B company with a technical product and 3-20 engineers, but no CTO or a CTO who is too junior for the strategic decisions in front of you.. You're a non-technical founder who needs someone to translate what your engineering team is telling you into business decisions, and to tell you when you're being sold something you don't need.. You have an AI initiative in progress or planned and want senior oversight on architecture, vendor selection, and integration approach before you commit.. You're preparing for a board conversation or fundraise and need a credible technical voice on your team..
Not right if: You need someone to write code or run engineering operations daily. That's a full-time hire or a development engagement.. You want a rubber-stamp CTO for a pitch deck without real involvement. We take these engagements seriously..
Use Cases
B2B SaaS, Series A: A 40-person SaaS company had a 6-person engineering team and a CTO who was a strong IC but hadn't led architecture decisions at scale. They were about to re-platform their core product and evaluating two major approaches. The decision affected cloud costs, future hiring, and the timeline of their next feature release. — Joined as fractional CTO on a 15-hour/month retainer. Reviewed both architecture proposals, found the cost modelling error in the team's assumptions on the preferred approach, and ran a structured decision session with the founding team. Also reviewed two pending vendor contracts and flagged a data portability clause that would have been hard to escape.. Outcome: The company chose the second approach based on revised cost modelling. The vendor clause was renegotiated before signing.
D2C E-commerce, Pre-Series A: A fast-growing D2C brand was being pitched by three AI personalisation vendors at once. The founding team had no technical co-founder and nobody who could evaluate claims about model performance, data requirements, and integration lift. — Ran vendor evaluation over three weeks as part of the retainer. Built a framework covering data requirements, model explainability, integration complexity, contractual flexibility, and references. Ran structured demos with each vendor and delivered a written recommendation with a ranked shortlist.. Outcome: The brand selected a vendor that was not their initial preference, based on lower integration burden and better data ownership terms. That vendor went live six weeks ahead of the timeline the original preferred vendor had quoted.
Healthtech, Seed Stage: A digital health startup was building a patient data platform and preparing for an enterprise sales conversation with a hospital group. The hospital's IT team sent a detailed security and architecture questionnaire that the founding team couldn't answer confidently. — Reviewed the questionnaire, assessed the platform architecture against each requirement, found three gaps, and worked with the engineering team to close the most critical one before the deadline. Drafted the technical response section.. Outcome: The startup passed the hospital IT review and the enterprise deal progressed to contract stage.
Results
What senior oversight changes.
B2B SaaS, Series A, 40 employees: Architecture decision corrected before build; vendor clause renegotiated before signing. When a Series A SaaS company brought us in as fractional CTO, they were two weeks from starting a re-platforming project on an architecture the team had agreed on. Our first review found a cloud cost modelling error: the preferred approach would cost 2.8x what the team projected at expected usage. We also found a data portability clause in a pending vendor contract that would have restricted data migration if they switched vendors. Both were caught in the first month of the retainer.
Frequently Asked Questions
What does pricing look like?
Retainers run $5,000-$10,000/month. The $5K tier covers 5-8 hours/month for companies that need a senior review cadence but don't have constant major technical decisions. The $10K tier covers up to 25 hours/month for active platform decisions, AI integration, or enterprise readiness work. We scope the right tier on an initial call.
How does the engagement work week to week?
Most work is async. You share documents, architecture diagrams, vendor proposals, or questions. We respond with written feedback within 24 business hours. Calls happen when a decision needs live discussion. We use a shared workspace (Notion or Google Drive) to track open decisions and recommendations. We work from the active agenda your team surfaces.
Do you need access to our codebase?
For the onboarding audit, read access to your codebase and infrastructure docs is useful. After that, it depends on what we're reviewing. Architecture decisions often require looking at actual implementation, not just diagrams. We treat your codebase under the same confidentiality terms as all client materials and sign mutual NDAs before the engagement starts.
Can you help us hire a full-time CTO when we're ready?
Yes. Because we have context on your technical environment, we can write a job spec that reflects your actual needs, evaluate candidates against it, and run the technical portions of the interview process. We've also helped clients use the quarterly review as a transition document when handing off to a full-time hire.
What's the minimum commitment?
Three months. The onboarding audit and first active month produce the most output. After that, the retainer runs month-to-month with 30 days notice to end. If it's not working, we'd rather end it cleanly than hold you to a term.
How is this different from a technical advisor or consultant?
A technical advisor gives you opinions in a meeting. A fractional CTO carries context week to week, reviews actual code and architecture, makes decisions with you in real time, and owns the recommendation trail. The difference is continuity. We're embedded in your decision-making, not dropping in for a workshop.
What size company does this work best for?
20-250 employees, $1-20M in revenue, with a working product but no senior technical leader on architecture, vendor decisions, or scale planning. If you already have a full-time CTO, you probably don't need this. If the founder is making every technical decision and it's slowing the business down, this is built for you.
