Quick answer: The niche you pick decides more about your results than your copy, your tooling or your follow-up. Most agencies pick on instinct, which means they pick whichever trade sounds like it has money, which means they pick plumbers, roofers and HVAC. Measured across 7,560,863 businesses, those three have the lowest share of addressable problems of any local vertical. The better way to choose is to decide which gap you sell against first, then pick the niche where that gap is most common.
Pick the gap before you pick the niche
This is the step almost everyone skips, and it determines everything downstream.
If you sell websites, you want verticals where businesses lack one. If you sell reputation work, you want verticals where reviews are missing. If you sell booking and conversion, you want verticals where the site exists but nothing on it converts. These are completely different lists of niches, and a single "best niches" ranking cannot serve all three.
Here is how common each gap is overall, measured:
| Gap | Businesses affected |
|---|---|
| No reviews | 7,024,428 |
| No custom domain | 2,133,256 |
| Inconsistent name, address, phone | 2,125,700 |
| No conversion path | 1,661,381 |
| Digital ghost | 777,889 |
| Fails on mobile | 490,120 |
| Stale site | 478,633 |
| Slow site | 119,283 |
| Parked domain | 39,821 |
No reviews is bigger than everything else combined. If you have no strong preference about what to sell, that is the gap with the most room in it.
If you sell websites: the no-website ranking
| Niche | No website |
|---|---|
| Barber shop | 35.4% |
| Beauty salon | 33.3% |
| Pet groomer | 31.8% |
| Tattoo parlour | 28.2% |
| Car repair | 26.9% |
| Dry cleaner | 24.0% |
| Nail salon | 20.7% |
| Hair salon | 20.7% |
| Landscaper | 14.4% |
| Restaurant | 11.1% |
| Dentist | 9.7% |
| Med spa | 6.8% |
| Electrician | 6.1% |
| Plumber | 4.1% |
| Roofer | 2.7% |
| HVAC | 2.6% |
The spread is roughly fourteen to one. A thousand barber shops contains about 354 prospects; a thousand HVAC companies contains 26.
The trades at the bottom are the ones most agencies start with, because they sound like businesses with money. They do have money. They also have websites, because somebody has been selling them one every month for a decade.
If you sell reputation: a different ranking entirely
Reviews invert the picture. Med spas are a weak website niche at 6.8% and an exceptional reputation niche: 26,197 of 28,072, or 93.3%, have no reviews.
That pattern repeats across appointment-based medical and aesthetic businesses. The practice is busy, the patients are happy, and nobody asks for a review because it feels awkward in a clinical setting. The gap is procedural rather than a verdict on quality, which also makes it an easier conversation.
So if your service is reviews, ignore the no-website table entirely. It will send you to barbers when you should be calling clinics.
The three filters that actually matter
Gap density. How many businesses in this niche have the specific problem you fix. This is the one most people skip and it dominates everything else.
Ticket size. A barber will not pay what a med spa pays. High gap density with a low ceiling is a volume business; low density with a high ceiling is a sales business. Pick which one you want to run.
Reachability. Can you actually get the owner. Trades and salons answer the phone during the day. Professional services hide behind reception. Of med spas, 99.75% have a working phone number, which is unusually good.
A niche that scores well on all three is rare. Two out of three is a workable business.
Niches worth a look that nobody works
Pet groomers, 31.8% with no website. Small, fragmented, almost nobody pitches them, and they are appointment-driven so booking tools sell well as a follow-on.
Dry cleaners, 24.0%. Unglamorous, steady, and routinely ignored by agencies chasing trades.
Car repair, 26.9% across 283,648 businesses. A rare combination of high rate and huge absolute volume. 76,240 shops with no website.
Restaurants, 11.1% but 947,976 businesses. The rate looks mediocre and the absolute number, 105,247, is the largest of any category. A middling rate on a huge category beats a great rate on a small one.
When to niche down and when not to
Niche down once you have closed three or four clients in the same vertical, not before. The reason is specificity: you cannot say "I work with med spas in Atlanta and here is what I did for three of them" until it is true, and that sentence is worth more than any targeting.
Before that, breadth is fine and arguably better, because you are still learning which problem you are actually good at solving. The mistake is committing to a vertical on a spreadsheet and discovering six months in that you dislike the work.
The other reason to wait: your first few clients tell you which gap you are best at fixing, and the gap determines the niche. Picking the niche first inverts the order and is how agencies end up in a vertical they chose for the wrong reason.