Cylex UK: what it is, what reviewers say, and whether to list
What the Cylex UK directory is, what its Trustpilot reviews say, what Companies House shows, and whether a free listing is worth it for a UK business.
Cylex UK is the UK edition of Cylex, a business directory that runs country sites in 32 markets. Cylex was founded in 1997 in Oberhausen, Germany, and has done most of its development in Oradea, Romania, since 2006. Standard listings are free: the company switched to an advertising-funded model, which is what pays for the site. (Source: Google's 2025 case study on Cylex.)
What is Cylex used for?
For customers, Cylex is a search directory. You look up a type of business in a town and get names, addresses, phone numbers and opening hours.
For a business, a Cylex listing is a citation: one more established site showing your name, address and phone exactly as they appear everywhere else. Search engines and maps use that agreement between sites to be confident about where you are and how to reach you. It's one of the general UK directories we'd put in the first 20 listings for most businesses.
Is a Cylex listing worth it?
Yes, as part of a set. On its own it won't move your rankings much. Alongside the big platforms (Google Business Profile, Bing Places, Apple Maps, Yell) and a handful of other general directories, it adds to a consistent picture of your business.
What decides whether it helps is accuracy. A Cylex page with an old address or a different phone number works against your other listings, so it's worth checking even if you didn't create it.
Ahrefs estimates Cylex UK's Domain Rating at 75. That's a third-party estimate of the site's link strength. It's useful for comparing directories; Google doesn't use it.
Cylex UK reviews: what people say
On Trustpilot, Cylex Business Directory UK has a TrustScore of 3.6 from 286 reviews. 74% are five-star and 21% are one-star, with very little in between. 26 reviews came in during the last 12 months, and Trustpilot notes Cylex hasn't been inviting customers to review it recently. Cylex replies to its negative reviews.
The 2 camps are easy to tell apart. The five-star reviews are mostly businesses praising quick, helpful replies from support. The one-star reviews mostly fall into 3 complaints:
- A listing they never asked for. Several reviewers found their business on Cylex without ever signing up, so you may be on it already.
- Out-of-date details: an old address, a business that closed years ago, an owner who has died. In the replies we read, Cylex removed or corrected these when asked.
- Marketing emails after a listing exists, such as performance reports and offers of paid tools.
None of the reviews we read complained of paying for something and not getting it. The complaints were about data and email. (Source: Trustpilot, checked 11 October 2026.)
For your local SEO, the practical point is the second one. If Cylex already has a page for you with old details, it's quietly telling search engines the wrong thing. Claim it and fix it, or ask them to remove it.
Cylex UK and Companies House
A lot of people search for Cylex UK on Companies House, usually to check who they're dealing with.
The directory doesn't appear to be a UK-registered company. Searching the register for "Cylex" on 11 October 2026, the only Cylex (UK) Ltd (company 04521514) is registered in Manchester for the construction of domestic buildings. It was incorporated in 2002, its last accounts were for 2015, and it has an active proposal to strike off. Nothing on the register links it to the directory.
Cylex itself was founded in Germany in 1997 and develops its sites from Romania. The legal notice on cylex-uk.co.uk names the company behind the UK site, so check there if you need the operator's details. (Sources: Companies House, Google's case study on Cylex.)
How to add or claim your Cylex listing
- Search for your business first on cylex-uk.co.uk. If a page already exists, claim it, so you don't end up with 2.
- Use the details from your one master sheet: the same name, address, phone and website you use everywhere. Our 7 decisions to make before you list explain how to settle them.
- Choose the nearest category to your main service, and add your secondary ones if offered.
- Confirm by email when Cylex asks.
- Check the live page a few days later and correct anything that came out differently.
If you're offered a paid upgrade, the free listing already does the citation job.
What you need
- Your business name, written the way you use it everywhere
- The address customers can find you at, with a checked postcode
- One public phone number
- Your website address
- A main category and a short description
What works
- +Free standard listing, funded by advertising
- +Part of a directory network running in 32 countries
- +Standard category structure that maps to most UK businesses
- +Lightweight verification process
What to watch
- -Lower differentiation, many competitors will already be listed
- -Limited customisation on free plan
- -Reviewers report listings they never created, some with out-of-date details, and follow-up marketing emails
Best for these UK industries
Cylex UK is particularly relevant for these business types, but works as a citation source for any UK business.
How CitationHQ lists to Cylex UK
- You enter your business details once. We normalise the data. name, address, phone, postcode, into a single canonical format used across every directory.
- Our team opens Cylex UK's submission flow, fills the form with your normalised data, and uploads any required photos or descriptions.
- Email is initiated. We monitor the verification flow and complete it where automated, or flag it on your dashboard if a manual step is required.
- You see the status of every directory, including Cylex UK. live in your campaign dashboard, with screenshots of submitted forms as proof.
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