The short answer
Agency directories such as Clutch, Sortlist, GoodFirms, DesignRush and The Drum Recommends mainly verify two things: that the agency is a real business, and that each reviewer is a genuine client. None documents checking that the reviewers are a fair sample of the agency's clients. For a UK firm, a directory badge is evidence of identity, not of the quality of the work.
Key takeaways
- All five directories describe checking that reviewers are real clients. None describes checking how those reviewers were chosen.
- The Drum Recommends tells agencies to invite their own clients to rate them, and to send double the invitations they need.
- Sortlist says its Trusted Partner badge cannot be bought, and lists a paid Sortlist+ membership among its conditions.
- DesignRush states that it does not verify the accuracy of what reviews say.
- A directory is a sound source of names. The reference check that matters is one where your firm picks the client.
The Drum Recommends, a UK agency register run by the marketing publisher The Drum, gives agencies a precise instruction for earning Recommended status. Gain at least three high ratings for any one service, and send out double the invitations you need. The agency writes the invitation list. Every rating then passes a validation process of automated and human checks, which confirms that the rater is a genuine client.
Both halves of that are true at once. The rater is real, and the agency chose who was asked. The first half is what every directory we read verifies. The second is what none of them documents checking.
For a managing partner comparing agencies, that distinction matters more than any star rating. We read the published help and method pages of five directories a professional services firm is likely to land on, and asked each the same question: according to its own documentation, what has been checked?
What a directory badge is evidence of
Every directory documents the second check below, and none documents the last three. The ladder lists what a partner might assume a badge means, in the order a directory could check it.
Check 1
The agency is a real business you can reach
Documented by Clutch, Sortlist, DesignRush and GoodFirms.
Check 2
Each reviewer is a genuine client
Documented by all five.
Check 3
The reviewers are a fair sample of the agency's clients
Documented by none. Clutch and The Drum tell agencies to invite their own.
Check 4
What a reviewer says about results is accurate
Documented by none. DesignRush says it does not verify review content.
Check 5
The agency suits a firm like yours
Documented by none. Sortlist says its badge is about verification, not fit.
The second check is done carefully. Clutch confirms a reviewer's identity and work history, and publishes reviews it cannot confirm with a Not Verified label. DesignRush requires real names and contact details so it can verify the reviewer's relationship with the agency. None of that is wasted. It rules out the invented review, which is the problem the checks are built for. It does not rule out the selected one.
Who chooses the reviewers
On The Drum Recommends, the agency decides which clients are invited to rate it. That is stated openly in The Drum's guidance for agencies, and the ratings are anonymous. The buyer guidance adds that a rater must have worked with the agency in the past 12 months, which keeps ratings current.
None of this is a scandal. Any agency asked for references offers its happiest clients, and a directory review is a reference with a form attached. The point is narrower: a rating built on invitations tells you the agency has satisfied clients. It cannot tell you what share of its clients are satisfied, and a UK practice hiring for a multi-year retainer needs the second number.
GoodFirms publishes more of its method than any other directory we read, including the weight of every ranking signal. It lists client interviews among its vetting steps. It does not say who selects the clients interviewed.
A badge that cannot be bought, and the membership behind it
Sortlist says an agency cannot buy its Trusted Partner badge, and an active paid membership is one of the five conditions for holding it. The badge conditions are an average rating of 4.0 or higher, at least 10 validated reviews, a verified phone number, a company registration or VAT number on file, and Sortlist+, which Sortlist describes as its paid membership.
Sortlist's explanation is that the membership shows the agency is not a dormant profile, and that is reasonable. But a buyer reading “cannot be bought” would not expect a subscription among the conditions. Clutch's Verified badge is openly a paid subscription, which is covered in whether Clutch is worth using.
Before you trust a badge
Want an agency somebody will answer for?
Free to your firm. The agency pays us, and only if the relationship works, so an introduction that fails earns us nothing.
Get a recommendationWhat the directories say about their own limits
Each directory states its limits plainly, usually on a page buyers rarely open.
DesignRush, review policy
“we do not endorse or verify the accuracy of their content”
The reviewer was checked. The claims in the review were not.
Sortlist, Trusted Partner badge
“The badge is about verification, not about which agency is the best fit”
Fit for a professional services firm is left entirely to you.
Sortlist, how it earns
“A provider can pay for placement in the directory”
Paid listings are labelled. Read past them before judging the order.
The Drum, guidance for agencies
“we recommend you send out double the invitations you need”
The agency picks who is asked. A high score is a best case.
The checks your firm has to run itself
Checks 3 to 5 can only be run by the buyer, and they take an afternoon. Start by looking the agency up on Companies House to confirm it trades under the name on the profile. Then choose two clients from the agency's own portfolio page rather than the references it offers, and ask to speak to them. An agency that refuses has answered check 3 for you.
In those calls, ask what the client would change about the relationship, and whether the results in the case study match their own figures. That is check 4. Check 5 is judged on the work itself, and how to tell if an agency is any good sets out the evidence to ask for.
When a directory is enough, and when not to sign yet
For a small job with a fixed end, checks 1 and 2 are usually enough. A brochure site or a one-off campaign limits what a poor choice can cost, and a directory will produce reasonable names quickly.
Do not sign a retainer on the strength of a badge. If the only evidence for an agency is its directory profile, the practice has not yet done the part of the check that predicts the outcome. And whichever platform supplied the name, it is not a party to the contract, which is set out in who answers if the agency fails.
The same test applies to us. Agency Network Solutions is paid by the agency, only once an introduction becomes a working relationship, and we publish the standard an agency has to meet so it can be checked the way this article checks directories.
Frequently asked questions
What partners ask about directory checks.
Are reviews on agency directories genuine?
The reviewer usually is. Clutch and DesignRush both describe checks that a reviewer is a real client of the agency. What the review says is another matter: DesignRush states that it does not verify the accuracy of review content.
Can an agency pay for a verified badge?
On Clutch, the Verified badge comes with a paid subscription. Sortlist says its Trusted Partner badge cannot be bought, but an active paid Sortlist+ membership is one of the conditions for holding it.
What is The Drum Recommends?
An agency register run by the marketing publisher The Drum. An agency becomes Recommended through client ratings, or through The Drum's own awards and rankings. On the ratings route, the agency invites the clients who rate it.
Which agency directory is most reliable for a UK firm?
GoodFirms publishes the most detail about its method, including the weight of each ranking signal. None of the directories we read documents checking that its reviewers are representative, so treat any of them as a source of names and confirm each agency on Companies House.
How can a firm check an agency's reviews itself?
Choose two clients from the agency's own portfolio page, not from the references it offers, and ask to speak to them. Ask one question the agency cannot prepare for: what would you change about working with them?
Sources and useful reading
- The Drum Recommends, how it works for agencies, and how it works for buyers, read on 16 September 2026.
- Sortlist help centre, the Trusted Partner badge for clients, with Sortlist+ and why Sortlist is free for clients.
- DesignRush, policy on reviews, and its ranking methodology.
- GoodFirms, research methodology, algorithm version 3.2.
- Clutch help centre, how Clutch verifies reviews.
- Companies House, find and update company information.
This article is commercial decision support. Directory policies are described as published on the date above, and they change.