100 to 500 FTE — the segment everyone ignores and nobody serves well

European HR tech has a tidy story about its customer segments. At the small end, sub-100 FTE companies use one of dozens of HRIS-with-compensation-module options — Personio, BambooHR, HiBob. At the large end, 1,000+ FTE companies run Workday, SuccessFactors, or Oracle HCM. The 100-to-500 bracket sits between these two stories, and the tools market has never quite figured out what to do with it.

The Pay Transparency Directive does not have this gap. It applies to every employer of any size. The 150-person company in Amsterdam and the 250-person manufacturer in Porto carry the same obligations as the multinational in Stuttgart. The tools they have to work with do not match.

Who this segment actually is

The 100-to-500 FTE European company looks like this:

• A founder or CEO who is still in compensation conversations occasionally — not as often as before, but during board comp-package decisions or anomalous offers.
• One or two HR generalists who handle everything from recruitment to performance to payroll oversight. A dedicated C&B function is years away.
• An HRIS in place — Personio, HiBob, BambooHR are typical — that holds salary data but does not run compensation analytics natively.
• An annual review cycle that happens, but is conducted in spreadsheets, with manager input, and without a structured calibration process.
• Salary bands that exist informally — most managers know roughly what a Senior Engineer "should earn" — but are not documented anywhere defensible.
• A board that has heard of the PTD, has asked HR about it, and has been told "we're working on it."

This is not a small business with simple needs. It is a sophisticated organisation with a sophisticated compensation problem and no dedicated infrastructure to solve it.

Why no one in the tools market serves this segment well

The mid-market gap is not new — it has existed in HR tech for years. The PTD turns the gap from an inconvenience into an exposure. Pre-directive, the 200-person company could muddle through with spreadsheets and informal logic. Post-directive, the same muddling produces a report that cannot be defended.

Why the gap persists

Three structural reasons the tools market has not closed this gap on its own:

1. The economics are awkward. The 100–500 segment is too small for the enterprise sales motion (long cycles, multi-stakeholder, six-figure ACV) and too sophisticated for the SMB self-serve motion (low ACV, low touch). The customer in this segment requires consultative selling at SMB price points — a model most HR tech companies have not figured out.

2. The role of the buyer is non-standard. In sub-100 FTE companies, the buyer is the founder. In 500+ FTE companies, the buyer is the C&B Director. In the 100–500 bracket, the buyer is often a single HR generalist who reports to the founder or CEO and does not have the dedicated time or authority to evaluate enterprise-style products.

3. The product complexity is real. Building a compensation analytics product that serves 100–500 FTE companies well — flexible enough for diverse role architectures, simple enough for an HR generalist, defensible enough for a regulator — is genuinely hard. Most attempts have either landed too simple (an Excel template wrapper) or too complex (an enterprise product with a startup price tag and no implementation support).

What this segment actually needs

Three properties the 100–500 FTE compensation tooling actually has to have:

• Defensible by design. The methodology underlying every output is auditable. The HR generalist can answer "how was this calculated?" without consulting a vendor support article.
• Implementable in days, not months. The HR generalist has no budget for a six-month implementation. The product has to deliver value within the first week or the project stalls.
• Priced for a company without a C&B team. The ACV has to fit alongside the HRIS subscription and the recruiting tools, not displace them. €50k/year of Mercer is the wrong reference; €5k–€15k/year is closer.

None of these properties are individually exotic. The combination is what the market has missed.

The PTD compresses the window

The 100–500 FTE segment has been underserved for years without acute consequences. The directive changes the timing.

By June 2026, every employer in the EU above the relevant size thresholds — which is most of the 100–500 segment — must have a documented pay-setting methodology, a category structure for equal work and work of equal value, and the data infrastructure to produce the Article 9 metrics. The window to build this without external pressure has closed.

Three trajectories for this segment between now and June 2027:

• Spreadsheet sprint. Build it internally, in a hurry, with whatever templates the HR generalist can assemble. Produces a report; produces a fragile structure.
• Mercer engagement. Pay for the enterprise approach at a discount. Produces a polished deliverable; consumes a significant share of the year's HR budget.
• Purpose-built tools. A product designed for the segment's actual constraints. Produces an artefact that scales with the company; remains in use after the first report.

The first two are familiar paths. The third is what the segment has been waiting for.

The 100–500 segment is not an underserved niche. It is most of the European economy. The tools market has just not noticed.

Where the diagnostic starts

Before any tooling decision, the 100–500 FTE company benefits from an honest view of where it currently sits. The ReadinessCheck™ surfaces that view — by axis of the directive's principal obligations, without requiring any salary data. The output is a position view that informs whether the response is spreadsheet sprint, Mercer engagement, or purpose-built tooling.