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The most useful message we receive. If a listing is wrong, out of date or missing something material, send it and we will check it.

Worth flagging: an acquisition or change of ownership, an office opening or closing, a change in minimum engagement size, a repositioning that makes a current listing misleading, or a client attributed to the wrong firm.

Include the page, the specific line, and whatever evidence you have. A link to your own site is usually enough. We ask for nothing in exchange for a correction, and correcting an error will not affect a firm's position on a list.

Most are handled within five working days.

We add firms when they fit a page and we can verify them. There is no submission fee, no expedited option and no way to pay for placement, so please do not ask.

What helps us assess a firm:

• Two or three case studies with the client named and the scope described, ideally products still live
• Typical minimum engagement size and pricing model
• Team size and where people are based
• Ownership structure, including any parent company
• Sectors where you have real depth rather than a portfolio page

What does not help: a homepage link with no context, a wall of logos, or a claim to be the best with nothing behind it.

We reply to submissions we intend to act on, and usually say so briefly when a firm does not fit. We cannot promise a response to everything.

Journalists and analysts working on the design services market are welcome to get in touch. We are happy to talk about consolidation, ownership changes across the sector and what we see in agency pricing, and to point to the underlying sources.

Our published research can be cited with attribution and a link. No permission needed.

Questions about how we rank, or disagreements with a placement. Disagreements are genuinely welcome, including from firms ranked lower than they would like. If the argument is good we change the page.

We do not sell leads, broker introductions or take a commission on work that comes through this site. If you want to talk to an agency on one of our lists, contact them directly. Every profile links to the firm's own site for that reason.

We do not accept guest posts, sponsored articles or link insertions.