How to choose a fractional CTO in Belgium: a guide for non-technical founders

The conversation almost always starts the same way. A non-technical founder, somewhere between seed and Series A, describes a technology problem that has been growing in the background for months. The engineering team is shipping but not fast enough. The technical decisions feel opaque. The investor is asking questions the founder cannot answer confidently. What they need is experienced technology leadership, but a full-time CTO is too expensive, too permanent, and too hard to evaluate without technical expertise.

A fractional CTO is the answer a growing number of Belgian founders have landed on. But "fractional CTO" covers a wide range of models, and choosing the wrong provider, or choosing based on the wrong criteria, is a mistake that costs months and significant budget to unwind.

This guide covers what to look for, how the Belgian market is structured, what different provider types actually offer, and how to make a defensible decision on one of the more consequential calls you will make at this stage.

madewithlove has been advising Belgian and European SaaS companies on technology strategy since 2012. We have conducted more than 178 structured technical assessments of Belgian and European SaaS companies, and the observations in this guide draw on that body of work.

Table of contents

1. What should you look for in a fractional CTO firm?
2. How does the Belgian fractional CTO market work?
3. How do the main types of providers compare?
4. Which type of company needs which type of fractional CTO?
5. How long does a fractional CTO engagement typically last?
6. What does a fractional CTO cost in Belgium?
7. Fractional CTO vs full-time CTO: when each makes sense
8. How madewithlove's approach differs: from audit to advisory
9. Frequently asked questions

What should you look for in a fractional CTO firm?

Three criteria matter more than anything else when evaluating fractional CTO providers: sector experience, diagnostic methodology, and engagement flexibility. A firm that scores well on all three will be useful at your current stage and remain useful as your needs evolve. A firm that scores well on one but not the others is a specialist tool when you need a general one.

Sector experience means more than having worked with SaaS companies before. It means having seen enough of the specific problems you are facing (scaling a backend under investor pressure, evaluating a platform rewrite decision, building an engineering team from three people to fifteen) to have genuine pattern recognition rather than considered opinion. Ask for specific examples. Category names are not evidence.

Diagnostic methodology is the differentiator most founders overlook. A fractional CTO who arrives and starts advising without conducting a structured assessment of your technical situation is working from incomplete information. The best firms use an explicit audit framework to diagnose the current state before recommending any direction. After 178 engagements and counting, the patterns in what goes wrong and what it takes to fix it are documented, repeatable observations, not instincts. Ask how a provider determines what to prioritise in the first eight weeks. If the answer is "I talk to the team and form a view," that is a process, but it is not a methodology.

Engagement flexibility matters because your needs will change. A firm locked into a fixed retainer model is optimised for its own predictability. Look for providers who can scale involvement up or down, move from advisory to embedded delivery if needed, and, critically, can help you hire a permanent CTO and hand over cleanly when the time comes.

A fourth consideration, less discussed but genuinely important, is relationship continuity. Whether that is access to a broader advisory network, connections to the VC community, or the ability to commission adjacent work (technical due diligence, team building, process work) through the same relationship matters practically. Founder-CTO relationships are high-trust and high-context. The cost of rebuilding that trust with a second provider is real.

How does the Belgian fractional CTO market work?

The Belgian market for fractional CTO services is small, maturing, and increasingly competitive. Before 2020, the model was uncommon enough that most founders had not heard of it. By 2026, there are a handful of credible providers covering the Benelux region, plus a longer tail of independent consultants and international platforms that serve the market remotely.

The providers fall into four broad categories: individual expert CTOs working on a retained basis, boutique CTO-as-a-service firms, international fractional CTO platforms, and full-spectrum technology advisory firms. Each has a genuinely different model, price point, and ideal use case.

Individual expert CTOs are typically senior engineers or CTOs who have left in-house roles and now consult across two or three companies at once. They offer direct access to a specific person's experience and can build genuine working relationships. The trade-off is dependency: if that person becomes unavailable or the relationship breaks down, there is no institutional continuity. Their depth is tied to their specific domain and their specific network.

Boutique CTO-as-a-service firms typically combine advisory with hands-on technical delivery, so engineering support and strategic input run alongside each other. They work well for companies that need execution alongside advice, though the advisory and the delivery can blend in ways that are not always in the client's interest.

International fractional CTO platforms connect companies with a marketplace of available CTOs, matched by skill or calendar availability. The main advantage is speed of access. The main trade-off is context: a CTO matched through a platform brings no prior knowledge of the Belgian SaaS ecosystem, the relevant VC relationships, or the specific market dynamics that shape technology decisions here.

Full-spectrum advisory firms start from a different premise. The CTO engagement is one component of a broader relationship that can include technical due diligence, team assessment, and team building. This matters in practice because the diagnosis that precedes a CTO engagement often reveals that the problem is not a technology strategy gap alone. It is a team structure gap, a process gap, or a gap in understanding what the technical asset actually is.

How do the main types of providers compare?

The four main provider types differ significantly on the criteria that most influence the decision. The table below maps those differences.

Price ranges are indicative and depend on the scope of involvement, whether an initial audit phase is included, and whether the CTO is expected to attend board meetings and investor calls.

The table flattens nuance that matters. The most important column is the last one. Before asking any provider about pricing or availability, ask directly: "What type of company do you work best with, and what type of problem are you best positioned to solve?" The answer tells you more than a features list.

Which type of company needs which type of fractional CTO?

Stage, structure, and the nature of the problem drive the right decision. Budget is a constraint, but it is less decisive than most founders assume when evaluating options at this level.

A pre-seed or seed company with two or three engineers and a founder managing some technical work typically needs part-time advisory input rather than embedded involvement. The objective is to ensure technical decisions are sound and the team is being built in the right direction. A structured advisory engagement with limited monthly hours covers this well.

A Series A company whose CTO has recently departed, one of the most common scenarios that brings companies to a fractional CTO provider, needs something more substantial. There is a team in place, there are investors paying attention, and there is a roadmap to execute. Advisory-only involvement will not be sufficient. The new arrangement needs to bridge the gap between the departure and a permanent hire, which typically requires more embedded presence and a faster ramp. Structural clarity is the priority.

A scale-up approaching or past Series B, where the engineering organisation has grown to fifteen or more people and technical debt is becoming a visible business problem, typically needs a firm with genuine diagnostic methodology. The problem at this stage is understanding what you are actually dealing with before you start making changes. An audit-led approach is the right starting point, and it is worth asking directly whether a provider separates the diagnostic phase from the advisory phase or combines them.

An investor-owned portfolio company where the investor has flagged technical concerns needs both credibility and institutional relationships. The fractional CTO's recommendations need to land with the team and be legible to the investor. A firm with established VC relationships in the Belgian and Benelux ecosystem (PMV, Capricorn Partners, Holland Capital, and their portfolio companies) carries contextual knowledge that a platform-matched CTO cannot replicate.

One scenario that warrants a different answer entirely: a company that already has a CTO but needs that CTO to grow. A founder whose CTO is technically strong but struggling with leadership scale, investor communication, or team building does not need a fractional CTO alongside them. They need CTO coaching, a distinct engagement model focused on developing the existing technical leader rather than supplementing or replacing them. madewithlove offers this as a separate service, and it is worth knowing the distinction exists before you decide what you actually need.

One more boundary condition worth naming explicitly: before product-market fit, a fractional CTO is almost always the wrong investment. The playbook from our own engagements is clear on this. What a pre-PMF company needs is a skilled engineer who can iterate quickly on a prototype. Bringing in strategic technology leadership before you have evidence of what you are building is premature, and it often creates overhead that slows the iteration the company actually needs.

How long does a fractional CTO engagement typically last?

Most fractional CTO engagements in Belgium run between six and eighteen months. The right length depends on what the engagement is trying to achieve, not on an arbitrary schedule.

A well-structured engagement moves through recognisable phases regardless of how long it runs. The first four to eight weeks should be diagnostic. The fractional CTO should be mapping the current technical situation, understanding the team, identifying the constraints on delivery, and developing a structured view of what needs to change and in what order. Skipping this phase in the interest of getting started faster is the single most common mistake. Recommendations made without a structured diagnosis are guesses presented as expertise.

The advisory phase that follows typically runs three to six months, with regular involvement in technical decisions, team leadership support, and investor-facing communication. For companies going through a fundraising process during this period, the fractional CTO's involvement in data room preparation and technical due diligence support is often the highest-leverage activity in the entire engagement.

The final phase of a well-run engagement is the one most providers do not discuss openly: the exit. A fractional CTO engagement should end with either a successfully hired full-time CTO, a team that has internalised the frameworks and no longer needs external input, or a clear picture of what permanent resource is needed and why. An engagement without a defined exit condition tends to run indefinitely at the same level of involvement, which is neither efficient nor in the client's interest. Ask any provider you evaluate how they approach the end of an engagement before you agree to the start of one.

What does a fractional CTO cost in Belgium?

A fractional CTO engagement in Belgium typically costs between €4,000 and €15,000 per month, with most well-scoped engagements falling in the €6,000 to €10,000 range.

The spread is wide because the variables are genuinely different across provider types. Individual consultants working on a day-rate basis typically charge €1,200 to €1,800 per day, which translates to roughly €4,800 to €7,200 for a four-day-per-month engagement. Boutique firms quote monthly retainers that include a defined set of deliverables: advisory hours, team calls, quarterly strategy sessions, and investor availability.

Engagements that include an initial audit phase are typically priced separately, with the audit as a fixed-scope project and the ongoing advisory as a subsequent retainer. This is the more transparent structure: it separates the diagnostic investment from the ongoing engagement and allows both parties to assess fit before committing to a longer arrangement. It also means you know exactly what you are buying in phase one before you commit to phase two.

The most useful frame for thinking about cost is the alternative. A full-time CTO in Belgium at Series A or Series B typically costs €150,000 to €200,000 per year in total compensation, plus equity. A fractional CTO at €10,000 per month is €120,000 per year with no equity dilution and the ability to terminate with a month's notice. For a company not yet at the stage where a full-time hire is justified, the comparison is straightforward.

What matters more than total cost is what the engagement includes. An advisory arrangement that does not cover a structured diagnostic phase, board-level communication, and a defined exit plan will typically cost less and deliver proportionately less. Price is a reliable signal of scope.

Fractional CTO vs full-time CTO: when each makes sense

A full-time CTO is the right answer when the company has passed the point where part-time technology leadership is sufficient. The specific signals: an engineering team of more than fifteen people that needs daily cultural and directional leadership, a product roadmap with enough complexity that a single person needs to be fully embedded to navigate it, and a company stage where the CTO needs to be a co-owner of business outcomes rather than a senior adviser.

A fractional CTO is the right answer in four clear scenarios. The first is budget constraint: the company cannot justify or afford the full-time salary, particularly pre-Series A. The second is an advisory-heavy need: the company needs expertise and direction but not daily execution management. A fractional CTO who advises well while a strong engineering lead manages the day-to-day team is often more effective than a full-time hire attempting to do both. The third is transition: the company's CTO has departed and the gap needs to be bridged while a permanent hire is found. The fourth is augmentation: a full-time CTO needs senior technical input on a specific challenge (a platform rewrite decision, a technical due diligence process, a major security review) that sits outside their current bandwidth.

The most common mistake is hiring a full-time CTO before the volume of CTO-level work justifies it. A Series A company with eight engineers and a stable roadmap that brings in a full-time CTO at €160,000 per year often finds that person spending the majority of their time on work a strong tech lead could handle. The high-leverage technical decisions that justify the hire are episodic, and episodic work is available fractionally at a fraction of the cost.

The transition from fractional to full-time is a decision that should be planned from the start of the engagement. A fractional CTO who helps define the profile for their own replacement, supports the hiring process, and ensures a clean handover is delivering significant value beyond the advisory time alone. Ask any provider you evaluate how they approach this moment. It is a reliable indicator of whether their interests are aligned with yours.

How madewithlove's approach differs: from audit to advisory

madewithlove's fractional CTO service starts with a structured technical audit. Every engagement begins with a diagnostic phase before any advice is given. That diagnostic phase follows the same structured framework we have applied across more than 178 technical assessments of Belgian and European SaaS companies. The framework evaluates six dimensions: team structure and bus factor, process maturity and delivery velocity, architecture and scalability ceiling, code quality and technical debt, security posture and compliance, and documentation quality. Each dimension produces a scored assessment and a set of prioritised observations.

What this produces is a structured picture of where the organisation currently is, what the constraints on growth are, and what the most important changes are in the order they should be made, before a single recommendation is issued.

The fractional CTO engagement that follows is built on this foundation, and the foundation consistently surfaces the same pattern: the presenting problem and the actual problem are different. A founder who believes the company needs a new architecture often has a team structure problem. A founder who believes the engineering team is underperforming often has a process and communication problem. In 78% of our 178 audits, one person simultaneously controls architecture, code review, infrastructure, and product direction, the "brilliant bottleneck" that looks like a strength until the company tries to scale. Addressing the actual problem is faster, cheaper, and more effective than addressing the presenting one.

The second differentiator is what madewithlove offers beyond the CTO engagement itself. The firm operates across technical due diligence, fractional CTO advisory, and engineering team building in a single relationship. An investor who commissions a technical due diligence on a portfolio company and finds a technology leadership gap can move immediately from diagnosis to intervention without switching providers, losing context, or rebuilding trust with a new firm. An engagement that surfaces team-building needs can extend into recruitment support without a separate procurement process. This continuity comes from having one team that has done all three things together for more than fourteen years.

The third differentiator is the network. madewithlove has long-standing relationships with the Belgian VC ecosystem, including PMV, Capricorn Partners, and Holland Capital. For portfolio companies referred by investors, that context arrives with the engagement. For companies approaching fundraising, the ability to have the fractional CTO speak credibly to technical maturity in the context of Belgian and Benelux investment expectations is a practical advantage.

Frequently asked questions

What is the difference between a fractional CTO and a part-time CTO?

The terms are used interchangeably in most contexts. Where a distinction exists, it is one of arrangement: a part-time CTO might be employed on a reduced-hours contract, while a fractional CTO typically operates as an external consultant advising multiple clients simultaneously. For practical purposes, what matters is the scope of involvement, the governance arrangement, and whether the person is accountable as an employee or as an external partner. Most Belgian providers operate as external partners on a retained advisory basis.

Do I need a fractional CTO if I already have a strong engineering team lead?

A strong engineering lead who manages day-to-day delivery is not the same as CTO-level resource. The CTO function covers technology strategy, investor communication, architectural decisions at the highest level, and team structuring across the organisation. A lead engineer who is excellent at delivery is often the wrong person to sit in a board meeting and explain the technical roadmap to investors, or to make a make-or-break platform architecture decision. The two roles complement each other. A fractional CTO working alongside a strong tech lead is a well-functioning combination at the pre-Series A stage.

What should the first eight weeks of a fractional CTO engagement look like?

The first eight weeks should be predominantly diagnostic. The fractional CTO should be spending time understanding the technical architecture, talking to the engineering team individually and collectively, reviewing the product roadmap, identifying the constraints on delivery, and forming a structured view of the current state. At the end of this period, you should have a written assessment and a prioritised set of recommendations. If a provider is giving you strategic recommendations in the first two weeks before completing this diagnostic work, treat that as a warning sign.

How do I evaluate a fractional CTO candidate without technical expertise?

Evaluate the process, not the technical opinions. Ask how they structure the initial diagnostic phase. Ask what output they deliver at the end of it. Ask for anonymised examples of assessments from prior engagements. Ask for references specifically from non-technical founders. A fractional CTO who is genuinely skilled at working with non-technical founders will be able to explain what they do and why in terms a non-technical founder can evaluate. Heavy technical jargon in the sales conversation is a yellow flag.

Can a fractional CTO help me prepare for a fundraising round?

Yes, and this is often the highest-leverage use of the engagement. Investors doing technical due diligence on a fundraising company assess the technical architecture, the team structure, the development processes, and the ability of the CTO or interim CTO to articulate the technical vision. A fractional CTO who has already completed a structured audit of your technical situation is well positioned to prepare the technical narrative for the data room, respond to investor technical questions, and support the diligence process. Companies entering fundraising without this preparation consistently experience more friction and longer due diligence timelines than those who do not.

How do I know when to move from a fractional to a full-time CTO?

The primary indicator is team size and the complexity of the culture-building and management work. When the engineering team reaches fifteen or more people, daily leadership and cultural development typically justify a full-time presence. A secondary indicator is the nature of the decisions: when CTO-level decisions are continuous and strategic rather than episodic and advisory, the fractional model begins to strain. A good fractional CTO will tell you honestly when this point is approaching and help you plan the transition rather than prolonging the engagement.

What happens if the fractional CTO engagement does not work out?

A fractional arrangement is structurally more reversible than a permanent hire. Most retainer agreements include a thirty or sixty-day notice period, and if the engagement is not delivering, that notice can be served. The risk is lower than a full-time hire on both cost and reversibility. The more consequential risk is time: three months into an engagement that is not delivering is three months of strategic drift at a stage when direction matters. Proper diligence before engaging, checking references, evaluating the diagnostic methodology, understanding what the engagement actually includes, is the most effective risk management available.

What is CTO coaching, and how does it differ from a fractional CTO?

CTO coaching is a one-on-one development engagement for a CTO or technical lead who is already in post. The goal is not to supplement or replace their leadership, but to develop it: sharper decision-making, better team communication, more confident investor conversations, clearer strategic thinking. A fractional CTO fills a leadership gap. CTO coaching closes a capability gap. If your CTO is technically capable but finding the leadership or communication side of the role challenging, coaching is the more targeted, and more cost-effective, answer. madewithlove offers both services, and it is worth knowing clearly which problem you are solving before committing to either.

Do fractional CTOs typically take equity?

It varies by arrangement and by the depth of involvement. Some fractional CTOs request a small equity component, particularly for longer engagements where they are functioning more like an interim co-founder than an external adviser. Most advisory-focused fractional CTO engagements in Belgium are structured as cash retainers without equity. If equity is on the table, treat it as you would any equity grant: understand the vesting schedule, the share class, and the dilution implications before agreeing.

Other relevant articles

• CTO as a service for SaaS startups
• The fractional CTO explained
• What we do in our first weeks as fractional CTO
• When you do not need a fractional CTO