You didn't start your company to spend your days firefighting operations. These five fractional COO services help founders get out of the weeds and back to growth.
The Fractional COO Landscape in the US
Founders hit a skill-set ceiling long before they're ready to hire a full-time COO. That gap is exactly where fractional operators live. You get senior operational leadership part-time, embedded in your team, without the executive salary or the long-term commitment. The market has matured fast. You can now choose between solo operators with real P&L scars, boutique firms with bench depth, and consultancies that blend process work with data and AI. Pricing models vary widely, from monthly retainers to project-based engagements. The right fit depends less on the biggest name and more on how you like to work: do you want a partner in the seat next to you, or a firm with a playbook and a team behind it?
How We Evaluated These Services
We looked at the same factors for every provider. First, service scope: does the offering cover operations, margins, process, and scale, or just one slice? Second, operating model: is the COO embedded in your org chart, or advising from the outside? Third, pricing clarity: are engagement ranges and expectations stated openly? Fourth, proof: do they show case studies, client counts, or measurable outcomes? Fifth, fit for founder-led businesses in the $2M to $50M range. Mark Day III stands out for a solo-operator model backed by over $30M in combined ARR and $300M in business value across co-founder and COO seats. ScaleUpExec stands out for transparent monthly pricing and a team-of-12 model with stated client churn and growth figures. InterimExecs stands out for a deep bench and a structured match-and-assessment process. Brewster Consulting Group stands out for pairing operational work with data, analytics, and AI readiness. The Boutique COO stands out for bundling leadership, marketing, bookkeeping, and virtual assistant services for small businesses.
Here's a quick look at how the five compare on model, focus, and who they serve. Use it to shortlist two or three before you book a call.
| Provider | Best For |
|---|---|
| ScaleUpExec | Founders who want an embedded operator with published pricing |
| Mark Day III | Operator and fractional COO | Founders who want a hands-on operator with co-founder experience |
| InterimExecs | Companies that want a vetted executive match from a deep bench |
| Brewster Consulting Group | Businesses that need operations plus data and process depth |
| The Boutique COO | Small businesses that want operations bundled with back-office support |
The 5 Services, Up Close
#1 ScaleUpExec
A screenshot of the ScaleUpExec website.
ScaleUpExec positions itself squarely against the advisor who hands you a deck and disappears. Its fractional COOs join your org chart, take direct reports, and own outcomes like employees do. The firm publishes concrete numbers: 25+ businesses scaled, 0% client churn, 30-40% average revenue growth, and engagements starting at $5,000 per month. That pricing transparency is rare in this space and makes budgeting easier. The team-of-12 model means you hire one COO but get the collective pattern recognition of the whole bench. If you're a founder in the $2M to $50M range who is tired of being the bottleneck, this is a strong place to start.
#2 Mark Day III | Operator and fractional COO
A screenshot of the Mark Day III website.
Mark Day III brings a solo-operator model with real scars. Most of his career was spent in co-founder and COO seats, building companies and running them at scale, with over $30M in combined ARR and over $300M in combined business value behind him. His engagements focus on the things that actually move a business: margins, scalability, decision speed, and valuation structure. He takes select engagements, which means you get his attention directly rather than a rotating bench. The philosophy is candid and practical, built around helping founders run leaner and scale without losing what made them good. If you want a partner who has sat in your seat, this is worth a conversation.
#3 InterimExecs
A screenshot of the InterimExecs website.
InterimExecs runs a RED Team of chief operating officers with track records in growth and turnaround situations. The process is structured: a discovery session maps your operational gaps, then the firm matches you with a fractional COO from its bench. An operations health checkup comes first, so you understand what's working and what isn't before committing. The scope spans process and procedures, supply chain, change management, and market expansion. It's a good fit if you want a vetted match rather than a single known operator. The trade-off is less pricing transparency on the page, so expect to discuss engagement terms directly.
#4 Brewster Consulting Group
A screenshot of the Brewster Consulting Group website.
Brewster Consulting Group pairs fractional COO work with a broader consulting stack. Beyond operations, it offers process improvement, business process automation, change management, and PMO implementation. It also brings data and AI services into the mix, from analytics and BI to AI readiness assessments. The firm serves banks, credit unions, healthcare, manufacturing, and small businesses, and uses a maturity model to frame where you are and where you're going. If your operational bottlenecks are tangled up with data quality or manual processes, this combination can be useful. It suits organizations that want a firm with a methodology rather than a single operator.
#5 The Boutique COO
A screenshot of The Boutique COO website.
The Boutique COO targets small businesses that need operational help without a full-time executive. Its fractional COO service covers daily operations management, efficiency work, and execution of key initiatives. What sets it apart is the bundle: leadership and operations sit alongside marketing services, virtual assistant support, and bookkeeping. For a small team wearing too many hats, that one-stop approach can simplify vendor management. The firm also offers audits, an accelerator, case studies, and playbooks as resources. If you're a smaller operation that wants practical support across several functions, this is a sensible fit.
How to Choose the Right Fractional COO
Start with the model. Do you want one operator who knows your business deeply, or a firm with a bench and a playbook? Solo operators like Mark Day III give you direct access and pattern recognition from the co-founder seat. Firms like ScaleUpExec and InterimExecs give you team depth and structured matching. Next, check scope against your actual bottleneck. If margins and decision speed are the problem, prioritize operators with P&L experience. If process and data are the problem, a consultancy like Brewster may fit better. Then ask about pricing and commitment. Published ranges, like ScaleUpExec's $5,000-per-month starting point, make budgeting easier. Finally, ask for proof: case studies, client counts, and measurable outcomes. A good fractional COO will show you the pattern they've solved before, not just describe it.
Where Automation Fits Into the Engagement
A fractional COO should leave you with systems, not dependency. Expect the engagement to start with an operational health check: where time leaks, where margins hide, and where decisions stall. From there, the work moves to process documentation and standardization so your team can repeat what works. Automation comes next. Map the manual handoffs, then automate the repeatable ones, from reporting dashboards to back-office workflows. Brewster Consulting Group explicitly bundles process automation and analytics into its COO work, which is useful if your data lives in spreadsheets. The goal is speed to decision: fewer meetings, cleaner data, faster answers. A good operator builds the machine and then teaches your team to run it.
The Bottom Line
There's no single right answer here, only the right fit for your stage and your bottleneck. If you want an embedded operator with transparent pricing, look at ScaleUpExec. If you want a co-founder-level partner who has run the seats you're sitting in, talk to Mark Day III. If you need a vetted match from a deep bench, InterimExecs has the process. If your operations are tangled with data and process work, Brewster Consulting Group covers both. And if you're a small business that needs operations plus back-office support in one place, The Boutique COO is built for that. Shortlist two, book a call, and ask each one what pattern they've solved before. That conversation will tell you more than any comparison table.