How do I check whether a YouTube agency's case studies are real?

You check whether a YouTube agency's case studies are real by finding the client's channel yourself, comparing the public numbers and dates with the claim, asking which figures come from the client and which from the agency, and speaking to the client. On our case, the channel and the community reviews are public; the revenue comes from us and the founders.

Want to know what this means for your business? Book a 30-minute call → Or start with the free channel check.

Five checks anyone can do in an afternoon

1. Find the channel yourself. A case without a findable channel, name or link is a story, not proof.
2. Compare public numbers and dates. Subscriber counts and upload dates are visible on the channel. Do they fit the period the agency claims?
3. Separate public from private figures. Views are public. Revenue, leads and members are not. Ask who supplied each number.
4. Ask what the agency did and what it did not. Ads, a new offer or a viral guest can explain growth that has nothing to do with the agency.
5. Speak to the client. A short call with a reference tells you more than any case page.

None of these checks needs special access. They do need you to treat every number on a case page as a claim until you have seen where it comes from.

What we could not verify in our own research

In October 2026 we read the sites, case pages and review profiles of a long list of YouTube agencies. Some things we simply could not check. We describe them without names, because the point is the pattern, not the agency.

Sources: the agencies' own sites and public review profiles, read October 19 and 26, 2026. What we take from it: none of these is proof of bad work. They are claims that a buyer cannot check without asking.

What you can check on our own case

Our main case is Arthur & Bryan, two e-commerce founders with a paid community. Here is which parts you can verify yourself and which you have to take from us.

The claim as we publish it, word for word: two e-commerce founders, Arthur & Bryan, went from $12.5K to $140K per month, from about 50 to more than 400 members at $249, almost entirely organic. More than 90% of new members came through YouTube. Source: Menno Kater, October 19, 2026. Put that sentence next to the table above and you see exactly which half you can check and which half you take on trust. The write-up is in the case.

Questions to put to any agency about its cases

• Which channel is this, and may I look it up?
• Which numbers come from the client, which from YouTube Studio, and which from you?
• What else changed in that period: ads, a new offer, a new price?
• Is the client still working with you?
• Can I speak to them for fifteen minutes?

More on choosing in general is in how to choose a YouTube agency; what we deliver is on how we work.

When a case study should not decide your choice

A case is one business in one market at one time. Even a fully verified case is not a forecast for yours, and we make no promises about views, subscribers or revenue. What a case can show is how an agency thinks and whether its work leads to money instead of only views.

If you want to see how we think about your channel before you decide, the free channel check is where Menno looks at your channel himself and then shows you in 30 minutes what he would change. Prices are on the pricing page, and the service on our YouTube agency for founders.