Which Fractional CTO Services Fit Your Company? 8 Firms Compared

What do fractional CTO services include?

Fractional CTO services give you a senior technology leader for part of the week or for a set interim period. That leader sets technology priorities, a roadmap and a budget, reviews architecture and vendors, and reports to the CEO and board. Providers differ in two ways: who stands behind that person (a bench, a delivery team or one named leader) and how the engagement ends.

The work is the same executive job a full-time CTO does. In Axial Search's sample of more than 700 CTOs in its network, at director, VP and C-suite level, every one has worked directly with the CEO, board or executive team. Among the C-suite leaders in that sample, build, buy or partner decisions, budgets and sequencing are a main emphasis on their resumes. (C-suite in our sample includes founders and chiefs of small companies.)

That sample covers CTOs in general, not fractional CTOs specifically. It shows that the seat a fractional CTO fills is a board-facing one. Fractional changes how that role is delivered, not what it is. The questions that separate one firm from another are about delivery: one person or a team, ongoing or interim, and whether it ends in a permanent hire. Those questions shaped how we chose the firms below.

How did we choose these fractional CTO firms?

We included firms that supply a part-time, fractional or interim CTO, and compared them on five criteria:

• Technology focus versus a generalist fractional-executive bench
• Type of company served: startup, mid-market, PE portfolio or non-software business
• Engagement model: ongoing part-time seat, interim cover or a path to a permanent CTO hire
• AI scope: whether AI strategy and governance are inside the CTO's scope
• Coverage of the US and Canada

Each firm was checked against its own website.

AI scope is on the list because hands-on AI experience is far from universal. In the same sample, only 41% name hands-on generative AI tools such as OpenAI, Claude or LangChain on their resume. Among C-suite leaders the figure is 43%. C-suite resumes instead put a main emphasis on how models, data and systems fit together. That suggests many of these leaders understand the architecture without having used the tools directly.

Don't assume a fractional CTO covers AI. Before you sign, ask whether AI strategy and governance are written into the scope.

How do these fractional CTO companies compare?

Applying those criteria, the eight firms fall into four groups:

• technology specialists
• generalist fractional-executive firms
• private-equity-focused IT leadership
• managed IT providers with a virtual CTO role

The table below shows each firm's model, focus, path to a permanent hire and location, as stated on its own site. Where a site is silent, the table says "Not stated" rather than guessing.

Firm	Model	Focus	Permanent-hire path	Location
Axial Search	Fractional AI leaders plus search	AI, ML and data	Executive search offered	US and Canada
Ten Mile Square Technologies	Interim CTO plus delivery teams	Healthtech, media, SaaS, fintech	Helps hire permanent CTO	Arlington, VA
TechCXO	Generalist fractional executive firm	PE and venture portfolios	Interim-to-permanent handoff	Atlanta, GA
Freeman Clarke	Part-time or interim IT leaders	Mid-market companies	Not stated	No US address listed
Altus CXO	Fractional executive firm	Non-software companies	Not stated	Not stated
Performance Improvement Partners	PE-only IT leadership	PE portfolio companies	Not stated	Not stated
DAG Technology	Managed IT with CxO program	Not stated	Not stated	US metros and Toronto
Infused Innovations	Virtual C-level roles	Healthcare, finance, public sector	Not stated	Not stated

If you expect to hire a full-time CTO within a year or two, read the "Permanent-hire path" column first. Only three firms state one.

Which are the best fractional CTO firms?

The best fractional CTO firm is the one whose model matches your situation:

• Technology-led companies: Ten Mile Square Technologies and Axial Search.
• Non-software businesses: Altus CXO.
• PE-backed portfolios: Performance Improvement Partners.
• Buyers who want the CTO role handed off to a permanent hire: TechCXO.

Each entry below gives a best-for and a plain not-right-for, built only from the firm's own published scope. Use them to rule firms out as quickly as you rule them in.

1. Axial Search

Axial Search offers executive search, fractional AI leaders and specialist recruitment for AI, machine learning and data, and works in the US and Canada. Its fractional AI leadership service can be paired with a permanent search through the same firm.

Best for: Companies whose fractional technology leader must also own the AI agenda, from a firm that also runs executive search and specialist recruitment for AI, machine learning and data.

Not the right fit for: Companies outside the US and Canada, or buyers looking for a high-volume contract staffing shop.

2. Ten Mile Square Technologies

Ten Mile Square Technologies, based in Arlington, Virginia, provides interim CTO and head-of-product leadership for companies without a full-time CTO. The firm describes its work as setting technology goals, a rapid platform and team assessment, roadmaps and technology selection, followed by coaching and help hiring a permanent CTO. It lists healthtech, media, SaaS, fintech and investment as its industries.

Best for: Companies without a full-time CTO that want a technology-focused interim leader who can bring in delivery teams from the same firm and then help hire a permanent CTO.

Not the right fit for: Companies seeking a long-running part-time seat, since the page describes engagements as interim, and buyers who want to know team size, which is not stated.

3. TechCXO

TechCXO, based in Atlanta, offers a part-time CTO who sets 90-day and 12-month technology priorities, improves delivery between product and engineering and reviews architecture and vendor spend. The firm can provide interim coverage until a permanent hire and says it vets AI tools before they reach core systems.

Best for: PE- and venture-backed companies that want a part-time CTO with a built-in interim-to-permanent handoff and the option to add a fractional CFO, CIO or CISO from the same firm.

Not the right fit for: Buyers who want a technology-only specialist, since it is a generalist fractional firm where CTO is one of many roles.

4. Freeman Clarke

Freeman Clarke offers mid-market companies a part-time or interim CTO to shape and carry out the technology plan, including oversight of teams, suppliers and custom software. Its site cites 85+ IT leaders, and the firm also offers fractional CIO and CISO roles.

Best for: Mid-market companies that want a part-time or interim CTO from a bench that also covers CIO and CISO roles.

Not the right fit for: Startups that need a hands-on engineering build team, and buyers who want a US office, since none is listed on the pages reviewed.

5. Altus CXO

Altus CXO is a fractional executive firm whose site cites 32 executives across 8 disciplines. Its CTO page covers technology roadmaps, ERP and system implementations, AI and automation strategy, vendor evaluation and technical debt. The firm says it serves non-software companies in particular, naming manufacturing, healthcare, construction, agriculture and private equity.

Best for: Companies where technology is not the product, such as manufacturing, healthcare, construction or agriculture, that need help with ERP, operations systems and AI and automation strategy.

Not the right fit for: Software startups that need a product-engineering CTO, and buyers who want a stated headquarters or office.

6. Performance Improvement Partners

Performance Improvement Partners provides part-time CIO, CTO or CISO-level IT leadership for growth-stage private equity portfolio companies, and says it serves only PE firms in the middle and lower-middle market. Its work supports value creation, integration and exit readiness. Its site says it acquired AlphaAdvisors, an AI and data advisory firm.

Best for: Growth-stage PE portfolio companies that need part-time CIO, CTO or CISO-level leadership built around the hold cycle, from diligence through exit, with in-house AI and data advisory.

Not the right fit for: Any company outside a PE-sponsor setting, since it serves PE firms and their portfolio companies only.

7. DAG Technology

DAG Technology's part-time CTO, which it also calls a virtual CTO or vCIO, sets technology strategy, a roadmap and a budget, and reports to leadership and the board. The role is one of four in its CxO program, alongside a virtual CISO, a virtual compliance officer and a fractional CAIO. The firm states that its advice is vendor-neutral.

Best for: Companies that want vendor-neutral, operations-informed technology strategy, with the option to add a virtual CISO, compliance officer or fractional CAIO, from offices across US metros and Toronto.

Not the right fit for: Buyers who want a standalone CTO advisor rather than a service that sits beside a managed IT and security business, or who need named industry experience, which the CTO page doesn't list.

8. Infused Innovations

Infused Innovations offers fractional vCIO, vCOO, vCTO, vCISO, vCAIO and vCDxO roles, which it describes as "C-level expertise on demand." Its vCTO covers IT roadmaps and cloud strategy. It lists healthcare, finance, education, insurance and the public sector among its industries.

Best for: Organizations in healthcare, finance, education, insurance or the public sector that want a virtual CTO for IT roadmaps and cloud strategy, alongside a wide set of other virtual C-level roles.

Not the right fit for: Buyers who need to see the bench behind each role, since the page features one named leader, the founder.

Agency, consultancy or CTO as a service: which fits?

The right label depends on what you are buying:

• Agency or talent network: places one leader in your company.
• Consulting firm: can pair that leader with delivery teams.
• "CTO as a service": often means a virtual CTO role inside a managed IT or multi-role program.

Providers use these labels loosely, so check the model behind the label. Ask one question: are you buying one person's time, or a team behind a brand? The answer sorts the list above.

• Leader-focused models. Axial Search, Freeman Clarke, Altus CXO and TechCXO describe supplying fractional or interim leaders from a bench or network.
• Leader plus delivery. Ten Mile Square Technologies is the only firm here whose stated model pairs an interim CTO with delivery teams.
• PE-specific IT leadership. Performance Improvement Partners works only inside PE portfolios.
• CTO as a service. DAG Technology places its CTO role inside a managed IT CxO program, and Infused Innovations offers a set of virtual C-level roles.

If your problem is a decision, such as a roadmap, a vendor choice or a board question, one experienced leader is usually enough. If your problem is shipping software, ask who writes the code. If your problem is keeping systems running and secure, a managed IT provider's virtual CTO may fit better than either. If your problem is that you need a permanent technology leader, none of these models is the full answer.

When is a fractional CTO firm not the right fit?

A part-time engagement falls short in two cases: when the company needs a permanent leader to build and manage a team, and when the role is in effect a full-time seat that carries equity. In those cases, treat a fractional or interim CTO as a bridge to a permanent hire, not the end state.

Our data on full-time CTO roles supports this. In the CTO job postings Axial Search analyzed, 52% mention equity, and equity appears in postings at every level, including the C-suite. In the candidate sample, 99% of CTOs manage people.

Taken together, that describes a permanent seat that owns a team and has a stake in the outcome. A leader who is in the building two days a week is hard-pressed to hire, develop and keep an engineering team.

Use a fractional CTO to set direction, stabilize architecture and define the role. Then hire the permanent CTO, ideally through a firm that states a path to that hire.

Match the model first, then the firm

Match the model to your problem before you compare firms. Decide whether you need one leader's judgment, a team that can build, operational IT support or a bridge to a permanent CTO.

Confirm in writing that AI is in scope. Then use each firm's not-right-for line to cut the list down. The firms left standing will be the ones whose stated model fits your company.