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CTO Consulting Services from a fractional or interim CTO who decides, not advises.

We give founders and CEOs a senior technology leader for the decisions nobody inside can own: your architecture, your delivery plan and the honest read on your team. Our CTO consulting services come with unicrew engineers, so we build what the plan says.

  • 120+Projects delivered across 12 countries since 2012
  • 100+Senior in-house engineers, six countries
  • 5.0Unified rating across 61 client reviews on Clutch
  • ISO 27001Certified security practice, audited by Quay Audit UK
  • PMPCertified project managers

01Overview

When you need CTO consulting services

You need CTO consulting services when the technical decisions keep arriving and nobody inside can own them. Fractional CTO, interim CTO, outsourced CTO and CTO as a service are the names buyers give the seat. unicrew (founded 2012, formerly Artelogic) takes it, on a written mandate.

  • The call gets owned, not offeredA recommendation you are free to ignore is not leadership. The CTO decides, records why, and answers for the result.
  • No incumbent to defendWe did not inherit your system, make your hires or sign your vendor contracts, so the read on your team and your vendors has no reputation to protect.
  • Built to end wellArchitecture decision records, a written note of why each major call was made, plus roadmap and vendor rationale.
  • If the seat is not what you needTechnology advisory when your own team will execute, business analysis when the direction is set and the specification is not, a dedicated team when the answer is capacity.

02Proof

Why clients hand us the call

The question is not seniority, it is who carries the consequence when a call turns out wrong.

  • People who have made the callThe decisions on this page are ours: the re-shard on Solus Connect, splitting a single database into many because the bottleneck was its design and not the code; the Yii 2.0 refactor on WaiverKing, taken because a barely documented codebase kept putting deadlines at risk; the move onto Azure for Crik-IT.
    Weeks to hourson WaiverKing, to ship an update to live after the refactor and the release automation we called
  • Independent of your incumbents, accountable for the buildNothing in what you already run is ours to defend: not the architecture, not the hires, not the vendor contracts. On the build decision we offer accountability rather than independence: whoever advises you is whoever has to deliver it. Where the opinion has to be provably disinterested, for investor due diligence or a board opinion, hire an advisory firm with no delivery arm, and we say so on the first call rather than after the invoice. If your team is fine and you need nothing past the assessment, that is the answer you get.
    30%+lower AWS costs after we took over a US B2B SaaS platform and its infrastructure from the previous vendor
  • Long-horizon technical stewardshipWaiverKing CEO Craig Elsdon-Dew, working with us since January 2014, credits us with growing the platform "from a couple hundred companies to around 2,000" (verified Clutch review).
    ~2,000companies the platform reached, up from the couple hundred it carried when we started, and we have run it since 2014

03Compare

Which CTO model fits your situation

How permanent the leadership scope is decides which model fits, not company size or budget. It cuts against us twice: once daily engineering management is the job in itself, a part-time seat stops fitting, and where the technology itself is the product, wait until you can hire permanently. The table below compares three options. The fourth, an interim CTO scoped to a single milestone, is the same seat bought for one thing, and the first answer in the FAQ covers it.

Fractional CTOunicrew Full-time CTOHire No senior technical leadWait
Best forOngoing senior leadership on a recurring share of the week, agreed at scoping: a turnaround, a fundraise, an architecture call, or steady part-time oversight. Best forA permanent, broad leadership scope, or a company where the technology itself is the product. Best forA simple, stable product with no major technical decision pending.
Trade-offNot embedded full time, so institutional context builds slower. Once daily engineering management is the job in itself, the model stops fitting. Trade-offA long, expensive search and a high fixed cost, plus the time inside the company a hire needs before their calls come from real context. Trade-offRisk stays invisible until it surfaces in production, in a missed deadline, or in a failed diligence review.
You end up owningThe decisions in writing, the roadmap, and the rationale behind both. You end up owningAn executive on your payroll, and the search again if they leave. You end up owningWhatever the last person to touch it decided, and no record of why.

Quick self-check

Tick what is true for you. The read-out updates as you go.

0 of 4 true

You already have a technical owner

Nothing here says fractional CTO. If a capable senior lead is already making these calls and you want the other side argued on one of them, that is technology advisory, the smaller purchase. If what is missing is a buildable specification, that is business analysis.

Tell us anyway

One signal, worth thirty minutes

A single gap is usually one decision rather than a missing seat, and a recurring mandate bought to close it is more structure than the job needs. Worth a call before you scope anything ongoing.

Talk it through

Worth an assessment before anything ongoing

Two signals usually means the exposure is structural rather than one awkward quarter. The assessment is the small end of this engagement and produces the roadmap everything after it is scoped against. Stopping there is legitimate.

Book a discovery call

A fractional or interim seat is the right buy

Three signals describes a company whose technical decisions have no owner, not one awkward call. What is left to settle is shape rather than whether: an ongoing fractional seat, or one interim milestone with the handover planned in from the start.

Book a discovery call

Take the seat, and write the mandate first

All four together describe a company making technical commitments nobody is accountable for, which is what this engagement exists to close. The mandate is agreed before the seat is taken, not after. Most engagements start within two to four weeks.

Start with the assessment

A good fractional CTO should be actively working themselves out of a job: documenting architecture decisions, building engineering management capacity in the team, and helping the company understand what the full-time CTO hire should look like.

Andrii BurdaSenior Engineering Manager, unicrew

04Capabilities

What a CTO engagement covers

Eight mandates a CTO seat is scoped against. The written mandate settles which of them this one owns, and it is agreed before the seat is taken. What the category covers is on our blog.

  • Software architecture review

    Architecture and scale review

    Data flows and integrations

    We map the architecture, the data flows and the integrations, then say what will not hold at your next order of magnitude, what fixing it costs, and how to sequence it so the system keeps running.

  • Technology roadmap consulting

    Technology roadmap

    Horizon agreed at scoping

    A prioritized plan with its horizon agreed at scoping: what to build, in what order, on what stack, and what to deliberately not build yet.

  • Technical due diligence

    Due diligence preparation

    Your side of the review

    Your side of a raise or an exit: code, architecture, infrastructure, technical debt, security posture and team capability, readable before an investor asks. What investors work through is set out on our blog, drawing on practice insights from unicrew CTO Oleksandr Trofimov.

  • Software delivery consulting

    Delivery process turnaround

    CI/CD, review, cadence

    When features keep slipping, the cause is usually estimation, review or release mechanics rather than effort. We read how work is scoped, tested and shipped, then fix the step costing you the calendar.

  • Engineering team assessment

    An independent read on the team you have and the vendors you pay: who is really carrying the system, where the single points of failure sit, and what to hire next.

  • AI strategy consulting

    Where AI belongs in your sequence, and what has to be true before it does. The build-versus-buy judgment and the readiness call are their own engagements, so the CTO routes them rather than improvising: an AI readiness assessment when the question is whether your data can carry it at all, and a dedicated AI leadership seat when the answer is yes.

  • Security posture review

    Security and compliance posture

    Access, data, dependencies

    Where you are exposed before a customer's security questionnaire finds it: access control, data handling, dependencies and cloud configuration. unicrew runs a dedicated security engineer and a part-time senior security consultant.

  • Cloud cost optimization

    Where the infrastructure bill is going, and what it takes to cut it without a risky re-platform. One US B2B SaaS takeover is the worked example.

05Trust

What a CTO engagement hands over

Most leadership work leaves nothing behind but a slide deck. Three things are yours at the end of the assessment, before any decision about an ongoing seat.

  • PrioritizedA written read on architecture, delivery and scaleWhat to fix first, what can wait, what is already fine, with effort and impact on each
  • In writingThe mandate, agreed before the seat is takenWhich decisions the CTO owns, what they report and to whom, and the KPIs
  • Yours to keepArchitecture decision records and roadmap docsYour next technical leader inherits the reasoning, not just the code

06Stack

Stacks we have made these calls in

Stack familiarity is the difference between a judgment and a guess. This list is what clients were already running when we arrived, not a greenfield shortlist: one platform on it was a barely documented legacy codebase, and the call to refactor onto Yii 2.0 was made from inside it.

FrontendWhat your users touch
  • JavaScript
BackendServices, APIs, and business logic
AI & Data
  • MS SQL
  • MySQL
CloudWhere it runs, and what it costs

07Engagement

How you engage us, and how you pay

Three shapes. The assessment produces the read the other two are scoped against, and we will tell you which one fits before you commit.

  • A recurring fractional seat

    Recurring mandate

    A recurring share of the week, agreed at scoping and ongoing. The CTO sits in your Slack, your repository and your sprint reviews, and is accountable for outcomes rather than for advice.

    Best when
    The senior technical seat is empty and the decisions keep coming
    You pay
    Billed hourly, quoted per project
    Typical start
    Two to four weeks
  • One interim milestone

    Scoped mandate

    A launch, a raise, an architecture review, or the gap between permanent hires. The deliverable sets the end date, and the handover is scoped with it.

    Best when
    There is one thing to clear, not a permanent seat to fill
    You pay
    Outcome based, quoted per project
    Typical start
    Two to four weeks
  • Where the plan says build, the same engagement brings in a unicrew team, so the person who wrote the roadmap carries the delivery too.

    Best when
    The plan needs building and you want one line of accountability
    You pay
    Billed monthly, per team member
    Typical start
    Two to four weeks
You already have a technical lead

The assessment stands on its own, and the seat is a separate decision

If someone senior is already in the seat and the real question is whether the architecture, the delivery process or the vendor is the problem, buy the assessment and nothing else: a written read with effort and impact on every item, and no obligation to hand anyone a mandate afterwards.

08Industries

Industries we have made these calls in

We ramp on your sector's rules instead of learning them on your budget, which matters most where a wrong technical decision is a compliance event rather than a bug. Each card links to the work behind it.

Deepest expertise

Logistics and transportation

Order management, warehouse apps and fleet tooling for operations that cannot pause. Our software supports the movement of 9M+ vehicles for a leader in US finished-vehicle logistics.

Deepest expertise

Hospitality and leisure

Booking, membership and venue platforms built for seasonal load, including a rental platform rebuilt for a Santa Barbara paddle-sports center.

Fintech and financial advisory

Payment flows and accounting integrations, including the bookkeeping automation behind a UK advisory firm, whose head of product worked directly with our CTO alongside the developer.

Healthcare

Monitoring platforms and integrations with clinical systems, including a home health monitoring platform we stabilized and scaled. Here the architecture decision and the compliance decision are usually the same decision.

E-commerce

B2B and B2C storefronts with ERP and marketplace integrations, including a European manufacturer selling across seven countries.

EdTech and learning

Learning platforms and research tooling that stay usable as cohorts scale, including a time-tracking tool for a research university.

Name the decision nobody is answering for

A scoping call is about whether you need a CTO at all, and which shape of one: a fractional seat, one interim milestone, or nothing from us yet. We sign an NDA before anything sensitive changes hands, and if your current team is fine, we will say that.

Let's talk

What happens after you contact us

  1. We reply within one business dayA written reply to what you described, or the question we need answered before we can name the decision.
  2. A scoping callWhether this is a fractional seat, one interim milestone, or nothing from us yet, and what the CTO would actually own.
  3. A written mandateWhich decisions the CTO owns, what they report and to whom, the KPIs, and the assessment plan, agreed before anything starts.
  4. An NDA, then a start dateSigned before anything sensitive changes hands. Most engagements start within two to four weeks.

09Delivery

How a CTO engagement works

Read the system before proposing the plan. The assessment asks for repository and infrastructure access as well as time with your engineers, because a roadmap built on interviews alone inherits whatever the team already believes. Access runs under ISO 27001:2022.

  1. Scoping callTell us what is actually going on: the stalled build, the fundraise, the platform that will not scale. You bring the problem, not a specification.You getAn agreed mandate, a signed NDA, and a written definition of done.
  2. AssessmentWe read the architecture, the data flows and the delivery process, and interview your engineers and product owners so the findings describe how your team actually works. You provide read-only, least-privilege access, agreed with your technical contact before anything starts.You getA written read on architecture, delivery, security and scale exposure, with effort and impact on every item.
  3. Plan and mandateYou get a prioritized action plan (what to fix first, what can wait, what is already fine) and we agree the mandate: which decisions the CTO owns, what they report and to whom, and how success is measured. You bring whoever has to sign that mandate off.You getA prioritized action plan, an agreed decision mandate, and the KPIs the CTO is measured on.
  4. Lead and buildThe CTO takes the seat: in your Slack, your repository and your sprint reviews, accountable for outcomes rather than for advice. Our project managers and engineers work from Ukraine, Poland, Estonia and the UK: four of the six countries our engineers work in, and the four where the team you work with sits. The overlap window is agreed at scoping, and you provide the access and the standing meetings, on your own tools rather than a portal we impose.You getDecisions made and recorded, a roadmap that keeps moving, and, where you want it, a team executing it.
  5. HandoverArchitecture decision records, roadmap documentation, vendor rationale and onboarding material are written as we go, not assembled in the final week. When you hire in-house, we plan an overlap, and you name the person receiving it.You getDocumentation your next technical leader can start from, plus a handover period planned into the mandate rather than improvised at the end.

10Client voices

Our clients say

See our client reviews
5.0 unified ratingacross 61 verified client reviewsRead them on Clutch

12Questions

About CTO consulting with unicrew

Cost comes first and gets no number, because a recurring fractional seat and a one-off assessment are not the same purchase and a headline figure would be wrong for almost everyone reading. The rest draw the boundary: technology advisory advises and hands back a plan, this seat owns the decisions and answers for them.

It does not: CTO as a Service, outsourced CTO and virtual CTO are the market's names for the same seat, and the real choice is between two shapes of it.

  • A fractional CTO takes a fixed share of the week, agreed at scoping, when the decisions keep coming and a full-time executive hire is not the answer.
  • An on-demand CTO, or interim CTO, is engaged for one thing: a launch, a raise, a technology audit, or the gap between permanent hires.

A fractional seat can step up to interim leadership or hand off to a full-time hire, and when a fractional CTO is the right call against an in-house one is on our blog.

A prioritized technology roadmap with its horizon agreed at scoping; architecture decision records for the major calls; an engineering team assessment with a hiring plan or vendor shortlist; an AI readiness assessment; a build-versus-buy evaluation of the tools in play; documentation that makes your side of a technical due diligence readable; and onboarding documentation for your next technical hire.

We scope before we quote, because the real driver is how much of a senior leader's week you need and for how long, not a headline number. Three things move it:

  • the model (a recurring fractional seat, a milestone-scoped interim mandate, or a one-off assessment)
  • the size and state of the system
  • whether the CTO is also accountable for a delivery team

Where the engagement includes that team, it runs as team extension, billed monthly per team member. unicrew does not publish project price bands; the scoping call is where you get a real number.

It depends on the model, and the term is set by the model and agreed at scoping rather than by a standard contract length. There is no minimum engagement period. A recurring fractional seat runs while the decisions keep coming. An interim mandate is scoped around one thing and ends when that thing is cleared. The assessment is the small end of this engagement and stopping there is a legitimate outcome. Most engagements start within two to four weeks.

Our project managers and engineers work from Ukraine, Poland, Estonia and the UK. Those four are where the team you work with sits, inside the six countries our engineers work in. The overlap window is agreed at scoping rather than promised on a page, and with one US client that has meant a daily status meeting held in the team's Ukraine evening. The CTO works in your tools, your Slack, your repository and your sprint reviews, rather than a portal we impose.

Yes, and inheriting what you already run is most of the job. A fractional CTO joins a live system with an ERP or CRM, a cloud account, a CI/CD setup, existing vendors and, usually, a codebase nobody fully documented. We map those dependencies first rather than proposing a rewrite: on one B2B platform that meant assessing the on-premise setup and its bottlenecks before a single service moved to Azure. If your current vendor is doing good work, keeping them is a legitimate outcome.

Yes, on your side of the review. Investors and acquirers assess your stack, your architecture decisions, your technical debt, your security posture and your team's capability. A unicrew fractional CTO prepares the documentation, responds to investor questions, and addresses flagged concerns before they become deal blockers. If you are raising, what we do with startups covers the rest. What that review covers is on our blog.

You are handing someone your repositories, your cloud accounts and your roadmap, so run four checks on any vendor, us included. Any firm that advises and builds can describe itself the way this page does. Compare below the category.

  • The mandate in writing: the decisions owned, the reporting line, the KPIs. Without one, a part-time seat behaves like an advisory retainer, which you discover on the first contested call.
  • What happens when the plan says build: who staffs it, and whether the firm that wrote the plan carries the exposure when delivery goes badly. Ours: 100+ senior in-house engineers across six countries, unicrew employees rather than subcontractors.
  • What they do not hold: unicrew holds ISO 27001:2022 and ISO 9001:2015, audited by Quay Audit UK, and does not hold SOC 2.
  • The reviews rather than the rating: ours are 61 verified client reviews on Clutch carrying a 5.0 unified rating as of 31 July 2026, and every testimonial here links to the review it came from.

High enough that buyers have chosen us on the strength of one conversation, so ask to meet whoever would take your seat before you sign. An executive at a UK SaaS company described that meeting in a verified Clutch review published in 2023, under our former Artelogic brand: "During the interview process, we met Artelogic’s CTO, and he impressed us. He and his team stood above the other companies we interviewed due to their breadth of talent and eagerness to wanting to develop a relationship with us."

Not fully independent, and you should price that in. unicrew is a software engineering company, so if the plan says build, we would like to build it. What we offer instead is accountability: the people advising you are the ones who would have to deliver it. That is a strong incentive against a plan that cannot be built on the timeline it promises.

Where the read has to be provably disinterested, for investor due diligence or a board opinion, that is work for a firm with no delivery arm, and we are not one. We say that on the first call rather than after the invoice, and stopping at the assessment is a legitimate outcome here.

CTO consulting is an operational role: the CTO leads technology decisions, manages technical teams or vendors, owns the architecture, and is accountable for delivery. Technology advisory is a strategic one: the advisor gives expert input on direction, evaluates options and challenges assumptions, without operational ownership.

If you need someone to make decisions and drive execution, this page is the fit. If you need a senior voice in the room while your own team executes, technology advisory is enough, and it is the smaller purchase. What CTO as a Service means as a category is on our blog.

That combination is a single engagement here, and unicrew provides both: a fractional or on-demand CTO who owns the architecture and technical direction, alongside a dedicated development team that builds it, with one point of contact and one delivery accountability. You do not have to commit up front: you can begin with a scoped architecture or delivery review and add the build team when it is time to execute.

Every engagement carries structured documentation requirements: the decisions, the roadmap, the vendor choices and the onboarding material for whoever takes the seat next, written down while the work is happening. Transitions are planned rather than abrupt, with the handover period written into the mandate rather than improvised at the end. If you continue with a different unicrew CTO consultant, the institutional knowledge stays inside the team.

Thank you

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