Specialize or Diversify: When a Niche Brings Growth

Catch-all offering or niche: the question behind many growth plans

Almost every owner knows both pieces of advice. One says: specialize, then you will be found and can charge better prices. The other says: do not put all your eggs in one basket, or every industry crisis will hit you with full force. Both pieces of advice are right, and that is exactly why neither helps on its own.

That raises one question: under what conditions does specialization bring growth, and when does it limit it? To answer it, we first clarify the terms and the mental model of niche width, then look at what studies have found about specialists, generalists, and diversification in small businesses, and finally set out a calculation you can use to check your own niche.

A niche only becomes a strategy once you know how big it is.

Terms: niche, specialist, generalist

A niche is a delimited part of a market, such as an industry, a region, a type of equipment, or a particular occasion. A specialist serves few niches and aligns offering, knowledge, and processes with them. A generalist serves many niches and maintains a broader offering and broader knowledge for this.

A second distinction matters and is often blurred in discussion. A business can specialize by customer, serving one customer group with several services, or by service, offering one service to many customer groups. An electrical contractor that serves only medical practices is specialized by customer. A business that only installs charging stations, but for any client, is specialized by service. The two paths lead to different risks.

How such a choice is captured in one sentence is described in the guide sharpen your positioning. This analysis asks one step earlier how broad or narrow the choice should be.

The mental model: niche width from organizational ecology

Organizational ecology views companies much as biologists view species: as populations that must survive in an environment with limited resources. In the late 1970s, Hannan and Freeman derived the theory of niche width from this. Its core statement: specialists exploit a stable environment better because they direct all their strength at one segment. Generalists weather a changing environment better because they can move to other segments.

Translated for a business, this means: the right breadth depends on how strongly and how quickly your own market changes. In a market with steady demand, such as mandatory maintenance, specialization has the advantage. In a market where subsidy programs, technology, or regulations change frequently, some breadth is insurance.

What studies show about specialists and generalists

The obvious assumption is: breadth protects, so generalists survive longer. Sorenson, McEvily, Ren, and Roy (2006) tested this assumption with unusually complete data. They analyzed all US machine tool manufacturers between 1975 and 1995 and all US computer workstation manufacturers between 1980 and 1996, including every product introduction.

At first, the result contradicts the obvious assumption. Generalists launched more new products than was good for them, and they more often targeted new customer groups or novel features rather than incremental improvements. Both increased their risk of exiting the market. The authors explain this through routines: a firm that became broad by repeatedly entering new territory does not stop once the favorable breadth is reached. Only after this behavior was accounted for did the expected protection appear: breadth itself reduced the risk of exit.

This leads to a distinction that is useful for owners. Breadth has a positional advantage, because it spreads risk. The path there has a behavioral drawback, because it accustoms the business to risky expansions. The study concerns two technical industries in the US and large and small manufacturers together. The mechanism is easy to recognize, though: a business that tries out every new service eventually loses track of its own costs.

Expand into related areas, avoid unrelated ones

When a specialized business wants to grow, the question is where. Two studies of small and mid-sized companies give an indication. Singh, Gaur, and Schmid (2010) found an inverted U-shaped relationship between the diversity of the offering and performance among small and mid-sized companies: some breadth helped, too much breadth hurt. Management experience shifted the favorable range upward.

Benito-Osorio, Colino, Guerras-Martín, and Zúñiga-Vicente (2020) distinguished between related and unrelated expansion among Spanish manufacturers with fewer than 250 employees over the years 1994 to 2014. Related means: the new service uses the same capabilities, customers, or processes. Unrelated means: it has little in common with the existing business. Related expansion improved the performance of firms that were also active abroad, though not indefinitely. Unrelated expansion could worsen it significantly.

For a small business, this yields a simple rule: expand along only one axis at a time. Either the same customers with a new service or the same service for new customers. Both at once is an unrelated expansion, even if it does not feel like one. For the geographic expansion of the same service, there is a separate guide: expanding into a new region.

The niche calculation: is your niche large enough?

The most common limit of specialization is not competition but the size of the market. A niche that is too small makes every growth target unreachable after a few years. The niche calculation, the tool of this analysis, checks this in advance with four figures.

With average annual revenue of 8,000 euros per customer, 36 customers would yield around 290,000 euros of annual revenue from the niche. If the business wants to add 600,000 euros in revenue within three years, the niche alone is not enough. That is not an argument against it but information: either a second, related niche is needed, or revenue per customer must rise, for example through maintenance contracts or additional services.

1. Count the population

   How many businesses or households in the target group are there in your catchment area? Industry directories, chambers of commerce, and statistical offices help with the estimate.

2. Narrow down the need

   What share actually has the need you solve in the coming years? Estimate cautiously and justify the estimate.

3. Check reachability

   How many of them can your sales team approach with the time available? This is often where the real limit lies.

4. Compare with the target

   Multiply realistic customers by revenue per customer and compare the result with the growth target.

Two risks specialists underestimate

If you specialize in one customer group, you easily end up with a few large customers. This creates concentration risk. The rule of thumb from the article customer concentration risk applies here too: once a single customer accounts for a quarter of revenue, you should deliberately counteract. In a narrow niche, this threshold is reached faster because there are fewer possible customers.

The second risk is dependence on a single external driver. If the niche lives off a subsidy program, a regulation, or a particular technology, the business depends on decisions it does not influence. The logic of niche width helps here: the more changeable this driver, the more important a second mainstay that depends on a different driver becomes.

• No customer accounts for more than a quarter of revenue.
• The niche does not depend solely on one subsidy program or regulation.
• The niche calculation is sufficient for the growth target of the next three years.
• New services are introduced along one axis only and evaluated after twelve months.

Transfer: what this means for your business

Two readings stand opposite each other. The first says specialization is almost always right for small businesses because it concentrates knowledge and supports prices. The second says specialization is risky because small businesses have hardly any reserves for the loss of a market. The findings support a third view: specialization is the better starting point, breadth the better protection, and the transition has to be managed.

Companies that lead their niche worldwide show how a business can still become large with narrow specialization. What small businesses can learn from them is analyzed in the article hidden champions. And if breadth has already grown too large, the guide pruning your service portfolio describes how to end services in an orderly way. The limits of this analysis are clear: the studies cited concern manufacturers, some of them listed, and measure success through survival or returns. There is less robust evidence for trades and services.

Conclusion: when the niche carries

When does specialization bring growth, and when does it limit it? It brings growth when the niche is large enough for the target, the market is fairly stable, and the business expands only into related areas. It limits growth when the niche calculation does not add up, a few customers carry the revenue, or the market depends on a single external driver. Research on niche width adds a warning that is rarely voiced: breadth itself does no harm, but the habit of constantly becoming broader does.

1. This week: Work through the niche calculation for your most important customer group.
2. Next week: Check the four points of the checklist and note which are not met.
3. Next quarter: Decide whether to deepen, add a related niche, or scale back an unrelated service.

The niche is therefore not a matter of belief. It is a number you can calculate.