How to Choose the Right Niche for Your Agency

How to choose the right industry for your agency using client data, market fit, competitive advantage, and my four-step framework.

Choosing a niche is one of the biggest bets you'll make as an agency owner.

Pick well, and specialization sharpens your positioning, simplifies sales, improves delivery, and gives your agency a clear path to growth. Pick poorly, and you can spend years pushing into a market that was never a fit.

That's why I don't recommend choosing an industry because it sounds exciting, because a competitor is doing well there, or because someone told you it's a "hot niche."

Start with evidence.

In Anyone, Not Everyone, I lay out a four-step process for choosing the right vertical: gather your client data, identify three potential verticals, score them, and validate the market.

The process takes a few hours. That's a small investment next to spending the next three years in the wrong market.

What Makes a Good Agency Niche?

A good niche isn't just an industry with lots of businesses. You're looking for alignment between three things: your agency's strengths, the needs of the market, and the clients you're best equipped to serve.

That's the sweet spot.

The best verticals share favorable dynamics: businesses with stronger revenue, close-knit communities, meaningful insider language, market growth, professional requirements, dedicated associations and conferences, and some existing personal or professional connection to the market.

Not every great vertical checks every box. But the more boxes it checks, the more interesting it gets.

Step 1: Start With Your Existing Client Data

Don't begin your niche search with Google. Begin with your own business.

Your current and past clients hold a lot of useful information. Group your accounts by vertical, then collect three numbers: total clients in each vertical, average annual revenue per client, and average client retention in months.

Those are the three quantitative measures I recommend starting with, because they tell you where you've already demonstrated traction.

SaaS might sound exciting. The data is telling you something else. You may have a much stronger foundation in legal or healthcare. Don't ignore that signal.

Your Best Niche May Already Be Hiding in Your Client List

Agency owners assume specialization requires reinventing the business. Usually it doesn't.

You may already have multiple clients in one industry, strong case studies, existing referrals, industry relationships, team knowledge, proven delivery processes, and above-average retention. That's a head start. Why throw it away?

Use your history with current and former clients as a reliable guide when evaluating potential verticals. Your past performance won't make the decision for you, but it gives you better evidence than intuition alone.

Step 2: Narrow Your Options to Three Industries

Once you've reviewed the data, identify up to three verticals worth evaluating further. Not ten. Not twenty. Three.

That forces you to make choices. Sometimes the winner is obvious from the numbers. Sometimes you'll include an industry because you have a strong personal interest or strategic reason to pursue it even without much historical client data. That's fine. The process isn't purely mathematical. The goal is a shortlist you can evaluate seriously.

Step 3: Score Each Vertical for Fit

This is where the decision gets more interesting.

Revenue matters. Retention matters. Neither tells you whether you actually want to spend the next five years embedded in an industry. So you also need qualitative fit.

Score potential verticals across agency experience, company strategy, competitive advantage, and vertical dynamics: does sales like selling to that market, does client success like serving it, does the founder enjoy the market, does the vertical fit the company's vision and service roadmap, and does the agency already have an advantage or recognition there.

Do You Like the Clients?

This sounds soft. It isn't.

You're about to spend an enormous amount of time with these people. You'll interview them, attend their conferences, read their publications, build relationships with industry leaders, and create services around their problems. If you don't genuinely like or care about them, Deep Specialization™ becomes very hard to sustain.

You don't have to be obsessed with the industry. You should care about helping the people in it.

Does Your Team Like Serving Them?

Your opinion isn't the only one that matters. Ask sales which clients are easiest to sell to. Ask client success which accounts tend to be happiest. Ask delivery where you consistently produce the strongest results.

You may find your team already has a favorite market. That's valuable data.

Do You Have a Competitive Advantage?

Ask yourself what you already have that would be hard for another agency to copy: deep industry knowledge, specialized technology, proprietary processes, influential client relationships, unique talent, strong case studies, existing brand recognition.

You don't need all of these. You want some reason to believe you can become meaningfully different.

Look for Markets With Strong Vertical Dynamics

Some industries are naturally better suited to vertical specialization than others.

1. Healthy client economics. Can businesses in this market afford what you sell? I treat average annual business revenue above $1 million as a preferable characteristic, and I'd advise more caution when most businesses in the market fall below that threshold. That's not an absolute rule, but the economics need to work. A $50,000 annual engagement gets hard to sell when most companies in the vertical only generate $300,000 a year.

2. A close-knit community. This is one of my favorite signals. Do people in the industry know each other? Do they attend the same conferences, belong to the same associations, participate in the same online communities? If yes, reputation spreads. When one client gets results, others hear about it, and referrals and word of mouth get far more valuable.

3. Insider language. Look for industries with their own acronyms, terminology, regulations, and shorthand. Insider language lets specialists clearly signal "we understand your world." A generalist can copy your service list. It's much harder to fake years of context. Extensive jargon, acronyms, and insider sayings are a favorable vertical characteristic.

4. Market growth. A growing market gives you a tailwind. A declining one gives you a headwind. You can build a successful agency in either, but why make it harder than it needs to be? Look at number of businesses, industry revenue, employment, new company formation, capital investment, regulatory trends, and consolidation. You don't need a fashionable industry. You need one with enough economic activity to support your growth goals.

5. Associations and conferences. A vertical with multiple associations, conferences, publications, and communities matters for a simple reason: you know where your buyers gather. That's a roadmap for sponsorships, speaking, partnerships, content distribution, relationship building, and outbound prospecting. Having at least two dedicated associations and conferences is one of the preferable characteristics of a vertical.

Step 4: Validate the Market Before You Commit

This is where you take the emotion out of the decision.

You may love the clients. Your team may love the work. Your positioning may be perfect. There's still one question: is the market large enough to support the agency you want to build?

You need to validate the total addressable market. TAM is the number of businesses in the vertical you could potentially sell to. Use the most accurate number possible for the specific niche you're targeting, not a broader industry number that inflates the opportunity.

If you specialize in personal injury firms, don't use every law firm in America as your TAM. Use personal injury firms. Specificity matters.

How Small Is Too Small?

There's no universal answer. It depends on your pricing, your growth goals, your target client size, and how much of the market you could realistically win.

I cite positioning expert David C. Baker's recommendation that a vertical contain more than 2,000 businesses, and I'd add caution when average business revenue in the market falls below $1 million.

Think of these as filters, not laws. A niche with 1,500 massive enterprises can be far more attractive than one with 50,000 microbusinesses. The economics matter more than the headline number.

Use This Simple Market Validation Formula

TAM × 20% × 3% × average annual revenue per client = estimated revenue in three years.

Here's the logic. Assume roughly 20% of the total market is realistically a good fit for your agency. Assume you win about 3% of that addressable segment over three years. Multiply that by your average annual client revenue. The 20% figure is a conservative Pareto addressable market. The 3% figure is a semi-conservative three-year market-share assumption.

Take a hypothetical vertical: 10,000 businesses, average client value of $60,000 per year.

10,000 × 20% × 3% × $60,000 = 60 clients × $60,000 = $3.6 million in annual revenue

Now ask: does that opportunity support my growth goals? If yes, keep going. If no, reconsider the niche.

A Real Example From Anyone, Not Everyone

In the book, I walk through this process with a strategic integrated communications agency considering hospital systems. The market contained 2,466 hospital systems, and the agency's average annual revenue per client was $150,000.

2,466 × 20% × 3% × $150,000 = $2,219,400

That projected revenue was enough to meet the agency's goals, so the market passed the validation test. That's the point of market validation. You stop debating whether a niche "feels too small" and put numbers behind it.

Don't Choose a Niche Based on Market Size Alone

A giant market can still be a terrible niche.

Imagine an industry with 100,000 companies. Sounds great. But nobody on your team enjoys working with them, your retention is terrible, your services aren't particularly important to their business, the market is fragmented, there are few associations, buyers have tiny budgets, and you have no competitive advantage.

That's not a great niche. It's a large bad niche.

A smaller industry where your agency already has happy clients, high retention, strong proof, industry relationships, and excellent economics can be far more attractive. Fit beats size.

Don't Choose the Industry Everyone Else Is Talking About

Every few years, agencies pile into whatever market looks hot. SaaS. Crypto. Cannabis. AI. Whatever comes next.

There may be real opportunity there. But "it's growing" isn't enough. Do you understand these buyers? Can you create exceptional results? Can you become an insider? Do you have an advantage? Do you actually want to spend years serving this market?

If not, you're chasing demand. That's not Deep Specialization™.

Don't Choose Based on One Great Client

Another mistake: you land one amazing client. They're profitable, you love them, the work goes well, and suddenly you decide "this is our niche."

Slow down. One client is a data point, not a strategy. Look for patterns. Does the market have more clients like them? Are the economics attractive? Do similar businesses share the same problems? Can your results be repeated? Does your offer translate? Validate before you reposition the entire company.

What If You Have No Client History?

If you're a new agency or exploring an entirely new market, you won't have meaningful client data. That makes the decision harder, not impossible.

Look at agencies and other professional service firms already serving the vertical. If other businesses have successfully built around that market, that's evidence an opportunity exists. You can also investigate existing specialist competitors, typical agency spend, industry associations, trade publications, conferences, common pain points, buyer roles, and market size.

Recognize what you're doing: making a more educated hypothesis. You'll need to validate it through conversations and early clients.

The Industry You Pick Has to Fit the Agency You Want to Build

This is easy to overlook.

If your goal is a $20 million agency, your target vertical needs very different economics than someone building a $3 million boutique. If your long-term goal involves acquisitions, recurring revenue, or an agency that can operate without you, the vertical needs to support those ambitions too.

Your niche isn't just a marketing decision. It's a company strategy decision. Evaluate whether a vertical fits the founder's company vision and product or service roadmap, not just the market opportunity in front of you.

The Four-Step Decision Framework

Don't overcomplicate this. Start here:

Gather your client data. Group clients by vertical and measure client count, annual revenue, and retention.
Identify three candidates. Choose the three most promising markets based on evidence and strategic interest.
Score the verticals. Evaluate team enthusiasm, founder interest, strategic fit, competitive advantage, market dynamics, and existing recognition and relationships.
Validate the market. Calculate the TAM and determine whether realistic market penetration can support your goals.

That's the four-step sequence I lay out in Anyone, Not Everyone. Don't spend six months debating. Get the data. Score the options. Run the numbers. Make a decision.

A Simple Industry Selection Checklist

Before committing to your niche, ask:

Have we already succeeded with clients in this market?
Do those clients generate attractive revenue?
Do they stay with us?
Does our team enjoy working with them?
Do we genuinely care about their success?
Do we understand their business?
Do we already have proof?
Is the industry economically healthy?
Are buyers connected through associations or conferences?
Is there meaningful insider language?
Do we have a competitive advantage?
Does the market have enough businesses?
Can those businesses afford our services?
Does realistic market share support our growth goals?

You don't need a perfect score. You need enough evidence to make a confident decision.

Pick a Market You Can Become Famous In

The goal of choosing a niche isn't just to make your website more specific. The goal is to choose a market where your agency can become unusually valuable. A market where you understand the buyer better than generalists, build relationships, create specialized proof, develop repeatable systems, earn trust, and eventually become the agency people mention when someone asks, "Who really understands our industry?"

That's where Deep Specialization™ begins.

What's Next?

Once you've selected the right industry, you need the market to understand why you're different. That's where positioning comes in.

Next read: Positioning That Makes Selling Easier

Related: Generalists vs. Specialists

Frequently Asked Questions

How do I choose a niche for my agency? Start with your existing client data. Identify industries where you already have strong revenue, retention, results, and relationships. Narrow the list to three options, evaluate each for strategic fit and market dynamics, then validate whether the addressable market can support your growth goals.

What makes a good industry niche for an agency? Strong verticals often have healthy client economics, a connected community, industry-specific language, favorable growth trends, associations and conferences, and some existing agency advantage or relationship with the market.

How big should an agency niche be? There's no universal minimum, but I cite a recommendation of more than 2,000 businesses in Anyone, Not Everyone, and I'd factor in whether the average company in the market generates enough revenue to afford your services.

What is TAM in agency specialization? TAM, or total addressable market, is the number of businesses in the specific vertical that could potentially buy your services. It should reflect your actual niche, not a much broader industry category.

How do I validate whether an agency niche is profitable enough? Estimate three-year revenue using TAM × 20% × 3% × average annual revenue per client. The result tells you whether realistic penetration of the vertical can meet your agency's growth goals.

Should I choose an industry based only on growth? No. Growth is one factor. You also need to weigh client economics, your experience and competitive advantage, team fit, market structure, relationships, and whether you actually care about serving the people in that vertical.