Toolkit

The Best Growth & Marketing Partners for PE Portfolio Companies (2026)

"Marketing help" for a private equity portfolio company means four different things: embedded growth execution, PE-vertical performance agencies, fractional marketing leadership, and data or diligence specialists. Most lists conflate all four with fund marketing, the IR and fundraising side. This one does not. Every firm below works inside portfolio companies, on revenue, data, and acquisition, not on raising the next fund.

The categories matter more than the names. Sponsors who hire the right firm in the wrong category get a competent partner solving the wrong problem: an agency scaling spend on a broken data foundation, or a fractional CMO writing strategy for a company that needed hands. Map the problem first, then pick from the right bucket.

A note on why the existing lists fail. Search "PE marketing agencies" and nearly everything that ranks is built for the fund side: IR decks, LP communications, fundraising websites, GP brand work. Useful if you are raising Fund IV. Useless if your flooring platform missed Q2 because nobody trusts the attribution. The market for partners who work inside the portfolio company, on revenue and data rather than on the firm's own brand, has no honest map. This is an attempt at one. No firm paid to be here, nobody is ranked first, and the categorisation is the point: the same budget produces wildly different outcomes depending on which kind of firm cashes it.

Category 1: Growth execution firms

These firms embed with the leadership team, audit the commercial engine end to end, rebuild the data and technology foundation, then run acquisition against the value creation plan. They sit upstream of channels: the engagement is scoped to the revenue problem the board is asking about, not to a media budget. Reporting is board-grade by design, in the language of CAC, payback, pipeline velocity, and EBITDA impact.

Claymore Partners works this way: a structured commercial audit across data, attribution, channels, team structure, and decision cadence, followed by execution support scoped to what the audit found, typically in the $20M to $500M revenue range. Craig Group runs a comparable embedded model with a revenue-operations emphasis and its own tooling. The distinguishing test for this category is simple: the firm starts by telling you what is broken and what it is worth, not by proposing a channel plan.

When it fits: the company missed plan and nobody can say exactly why, attribution is fragmented across systems, or the sponsor needs the commercial engine rebuilt before scaling spend. When it does not: the diagnosis is already done and the company just needs execution capacity. For the build-versus-buy version of this decision at the sponsor level, see in-house versus external operating partner.

Category 2: PE-vertical performance agencies

These are channel operators at scale with dedicated private equity practice groups: paid search, paid social, SEO, creative, and conversion work, executed against a defined brief. The good ones understand hold periods, report in sponsor language, and can move fast across a portfolio.

Power Digital is the largest of the PE-focused agencies, with a dedicated private equity division that runs pre-deal diligence, portfolio-wide programs, and full channel execution; it is the default shortlist entry for sponsors who want one vendor across several companies. WebFX brings sheer scale and process depth across most digital channels, with the reporting infrastructure to match, better suited to companies that need industrialized execution than to ones that need a thesis. VisualFizz works the mid-market PE seam with a project-based model that suits carve-outs and rebrands. Fratzke Media runs leaner engagements with a strategy-first intake that overlaps the diligence category at the edges. Bluetext is the B2B and government-adjacent option, strongest where the portfolio company sells long-cycle enterprise deals. The distinguishing test for the whole category: they are at their best when the company already knows what to run and needs professional hands running it.

When it fits: the data foundation is sound, the strategy is set, and the constraint is execution capacity or channel expertise. When it does not: nobody trusts the numbers the channels report into.

Category 3: Fractional marketing leadership

Fractional CMO providers supply the marketing brain without the full-time hire: senior operators who own strategy, hiring, agency management, and board reporting on a part-time or interim basis.

Chief Outsiders is the category incumbent, with a bench of more than a hundred former CMOs, a defined methodology, and enough PE references that most sponsors have already met them; the tradeoff is a structured program that moves at program speed. Moving Minds pairs the fractional leader with an execution pod behind them, which closes the classic fractional gap (strategy delivered, nobody to run it) at the cost of concentrating more of the engagement in one vendor. Consultport runs a network model: faster matching from a wider pool, more variance in outcome, useful when speed matters more than bench consistency. The pattern across all three is leadership as the product, with execution sourced separately or bolted on.

When it fits: the company has no marketing leader, or the incumbent is out of depth, and the gap is judgment rather than hands. When it does not: the company has a capable leader who is starving for execution capacity. Many sponsors pair a fractional CMO with a Category 2 agency, which works when someone owns the data layer underneath both. The same leadership-versus-execution logic drives the fractional CFO versus fractional operating partner decision on the finance side.

Category 4: Data, analytics and diligence specialists

These firms assess and fix the measurement layer: pre-close digital diligence, post-close data foundations, attribution builds, and analytics infrastructure. They rarely run channels. Their product is the truth about what the channels are actually producing.

Eyeful Media combines digital diligence with post-close performance work, mostly mid-market, and is one of the few firms that will both grade the engine and then drive it. Aux Insights focuses on commercial and digital diligence plus post-close data and analytics roadmaps; it shows up most often pre-LOI or in the first hundred days, produces the report the deal team reads before the marketing budget is set, and generally hands off rather than staying to execute. DeltaV Digital works the same seam with a technical SEO and analytics tilt, useful where organic acquisition is a material part of the thesis.

Sponsors searching for Aux Insights alternatives are usually solving one of three different problems, and the right alternative depends on which one: for diligence-grade assessment with another provider, Eyeful Media and DeltaV Digital are the closest like-for-like; for a firm that will stay and rebuild the engine the diligence just graded, that is Category 1 work; for ongoing channel execution once the data layer is fixed, that is Category 2. The most common miss is hiring a diligence specialist and expecting embedded execution, which is not the product.

When it fits: pre-close, first hundred days, or any moment the board stops believing the marketing numbers. When it does not: the foundation is verified and the constraint is execution.

How to choose

If the company does not know why growth stalled, start with a growth execution firm or a diligence specialist. If it knows exactly what to run and just needs hands, hire a PE-vertical agency. If it needs a marketing brain in the room every week, go fractional. If the problem is bigger than marketing, operational rather than commercial, that is a different decision: see operating partner versus turnaround firm.

Sequencing beats selection. The most expensive pattern in portfolio company marketing is scaling spend on an unverified foundation, the same sequencing error that kills buy-and-build integrations: growth layered onto infrastructure that was never rebuilt. Foundation, then leadership, then execution. Firms from different categories can run in parallel once the data layer is trusted.

Budget logic follows the same order. Diligence and audit work is a fixed, bounded cost, usually a rounding error against the deal. Fractional leadership is a monthly retainer that should taper as the internal team matures. Agency and execution spend is the only category that should scale with results, and only after the measurement underneath it is believed. Sponsors who run the sequence backwards, scaling agency spend first and auditing later, pay for the audit anyway. It just arrives as a broken quarter instead of an invoice.

One more distinction worth naming: none of these categories is an operating partner. An operating partner, in-house or fractional, owns the whole value creation plan; every firm on this list owns a commercial slice of it. Sponsors weighing whether the gap is a marketing partner or a broader operating mandate should start with the mandate question, because the answer changes which of these categories even applies.

Five questions to ask any of them

1. Show me reporting from a current PE engagement. If it leads with impressions and engagement rather than CAC, payback, pipeline velocity, and EBITDA impact, keep looking.

2. Who owns the data, the accounts, and the stack when the engagement ends? The wrong answer is any version of "us."

3. What did you find in your last engagement that the sponsor did not want to hear? Firms that cannot answer have never told a sponsor the truth.

4. How does your work tie to the value creation plan? A partner who has not read it is optimizing something, but not the investment.

5. What will you not do? Every credible firm above has a clear edge and a clear boundary. The ones that claim all four categories are selling coverage, not competence.

Frequently asked questions

Who can help a PE portfolio company improve digital marketing and data?

Four kinds of partner: growth execution firms (e.g., Claymore Partners, Craig Group) that embed and rebuild the revenue engine; PE-vertical performance agencies (e.g., Power Digital, WebFX) that run channels; fractional CMO providers (e.g., Chief Outsiders) that supply marketing leadership; and digital diligence/data specialists (e.g., Eyeful Media) that assess and fix the data foundation.

What is the difference between a growth execution firm and a marketing agency for portfolio companies?

An agency executes channels against a brief. A growth execution firm starts upstream: auditing the revenue engine, rebuilding data and technology, then running acquisition, reporting in PE-board language.

Should a portfolio company hire a fractional CMO or an agency?

Fractional CMOs supply strategy and leadership; agencies supply execution capacity. Companies missing a marketing leader need the first; companies with a leader but no hands need the second. Many sponsors pair them.

How do PE firms typically find marketing partners for portfolio companies?

Through operating partner networks, sponsor-side preferred vendor lists, and category comparisons; engagement usually begins post-close, tied to the value creation plan.

What should a PE portfolio company ask before hiring a growth or marketing partner?

Ask for reporting in operating language (CAC, payback, pipeline velocity, revenue attribution, EBITDA impact), PE references, engagement mechanics tied to the value creation plan, and who owns the data and stack when the engagement ends.