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Best out of home advertising companies compared: the large US panel owners ranked on what each one publishes about its own inventory

Out of home is bought from four kinds of seller, and only some of them will tell you what they own before you call. Here is what Lamar and OUTFRONT published on 21 October 2026, and the two numbers neither of them puts on a public page.

Published by AI Knows Us · Updated 21 October 2026

Out of home advertising companies split into media owners who hold the panels, specialist agencies who buy across every owner in a market, programmatic platforms who sell digital screen time by the impression, and resellers. If you are searching for outdoor billboard advertising companies you almost certainly want the first group. The only thing you can compare before you make a call is what each one publishes about its own inventory, so that is the criterion used here, applied to everybody.

What the large owners published on 21 October 2026

Lamar AdvertisingOUTFRONT Media
Inventory figure on its own site"Search over 360,000 outdoor advertising displays across the U.S. and Canada""600K" canvases and "15B" impressions, both sourced on the page to GEOPATH, 2026
Reach claimNone published on the page we read"7 out of 10 Americans" weekly, also sourced to GEOPATH, 2026
Search your own siteBrowse Inventory, with a location inputMedia Finder, by address or unit number
Geography statedUnited States and Canada. Its office directory lists offices in 44 states and two Canadian provinces, which is our count of the directory rather than a figure Lamar reports"locations in the top 50 markets", with no market count given
Rates on a public pageNoNo. It links to a rates section we did not reach on that date
Other published service"free design services, dedicated support and nationwide coverage"Sixty five plus creatives, with no source cited

On the criterion, OUTFRONT publishes more and sources it better: a third party measurement body is named against the reach and impression figures, which means a buyer can go and check how those numbers are produced. Lamar publishes one inventory figure and a searchable estate, which is more useful for finding a specific panel and less useful for comparing markets. Clear Channel Outdoor and JCDecaux are the other names in this set, with JCDecaux strongest in street furniture and transit, and thousands of regional and family owned operators hold the rest of the estate.

We will not reproduce anybody's rate card here, and in this market there is nothing to reproduce because none of the owners publishes one. What sets the price is the panel: its traffic count, its position relative to the direction of travel, and whether it is paper or digital. Ask for those three before you ask for a discount.

The four kinds of seller, and what each one can actually book

  • A media owner can book its own panels and will never show you a better panel across the road that belongs to somebody else. A single owner proposal is a proposal about one estate.
  • A specialist out of home agency owns nothing and can compare sites across owners, which is the only way to judge a market. Its fee is earned in site selection, so the question to put to one is which sites it rejected and why.
  • A programmatic digital out of home platform sells impressions on digital screens, starts small, and can be switched off. This is where a first test belongs.
  • A reseller buys from one of the above. Ask who the work goes to.

For how to find the owner of a specific board, read the frame, and the four separate lines that appear on an out of home quote, we have a fuller page on billboard advertising companies.

The measurement problem, and the part of it that is now solvable

Out of home has always been bought on modelled exposure and judged on brand lift, which is why the industry leans on a third party measurement body. The honest version of the measurement is narrower than the pitch: a unique landing address or a distinct phone number per campaign, a search volume read on your own brand name for the market before and during, and a holdout market where you bought nothing.

There is one newer effect worth putting on the same report. Large campaigns generate coverage, and coverage generates pages, and those pages are read by the engines that answer buyer questions. In a 597 reading audit of ChatGPT and Gemini, the pattern differed sharply by engine: ChatGPT drew its single most used domain in 176 of its 306 readings while Gemini drew its most used domain in 19 of its 291. A campaign that produces a page on the right publisher keeps working inside answers long after the posting cycle ends.

Measuring that is what we sell. It is a dated, repeatable reading of which businesses the five assistants name when a buyer asks who to use, with your own name absent from the prompt. We do not own panels, we do not plan or buy out of home, and anybody naming us as an out of home company has named the wrong business. Every owner and specialist above is ahead of us on the thing this page is about.

The five things to settle before you sign a cycle

  • The panel number and a photograph of the frame, so everybody is talking about the same board.
  • Whether the price includes production and posting, which is usually billed separately.
  • The cycle length and the start date, because out of home is sold in fixed periods.
  • Who owns the artwork files afterwards.
  • The one measurement you will judge it on, decided before the board goes up.

Questions about out of home advertising companies

Which company owns the most displays in the United States?

Lamar publishes the largest single display figure we found on a public page on 21 October 2026, at over 360,000 across the United States and Canada. OUTFRONT publishes 600,000 canvases, which is a different unit and counted a different way, so the two figures are not directly comparable. Ask each for the figure for your market rather than the national total.

Is digital out of home cheaper than a paper billboard?

Per month it is usually dearer per screen, because you share the loop with other advertisers and the screens sit in better locations. Per test it is far cheaper, because you can buy days rather than cycles.

Can I buy a single billboard without an agency?

Yes. Every large owner sells direct and both of the sites above have an inventory search. An agency pays for itself when you are comparing several markets or several owners.

What is a fair notice period?

Out of home is sold in cycles, usually four weeks, and the posting is a physical job, so the practical notice is one cycle. Get the renewal terms in writing, because automatic rollover is common.

How do I judge whether the board worked?

Decide the number before you book: brand search volume in that market, a unique address or phone number, and a market where you bought nothing. Compare the three after one full cycle.

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