The LinkedIn Ad Library is a year of B2B ads, with no way to automate it

LinkedIn publishes an ad library at linkedin.com/ad-library. For anyone selling to businesses it is the most underused free source in the category, partly because it arrived quietly and partly because almost no tooling touches it.

What it gives you

• Ads run on LinkedIn over roughly the past year, which is a far longer window than Meta gives you for commercial ads.
• Search by advertiser, so you can pull one competitor's B2B messaging in a single view, and by keyword across advertisers.
• Filters for country and date, which matter here because enterprise advertisers localise heavily.
• The creative itself: headline, body, format and the destination. This is the substance of a competitor's positioning, written by their marketing team, for free.

For EU-targeted ads the library additionally carries the transparency disclosures the Digital Services Act requires, including audience targeting parameters and reach. That is a genuinely unusual disclosure: it is the closest any platform comes to telling you which job titles a competitor decided to pay for.

What it does not give you

• No spend. As everywhere else, commercial ads carry no budget figure. Duration and volume are the only signals of commitment.
• No API. There is no public programmatic endpoint for the ad library, and access to LinkedIn's advertising APIs runs through partner and product grants tied to your own accounts, not to competitor research. This is the constraint that shapes everything below.
• No cross-platform view. Reading LinkedIn tells you about LinkedIn. A competitor's LinkedIn silence often means their budget moved to search, not that it stopped.

AdLemur does not collect LinkedIn. Runtime collection is switched off, because we have no approved grant and no validated public contract, and reusing an owned-account token for competitor research would be both a terms problem and a data-quality lie. We would rather show you a source as unsupported than show you a thin version of it labelled as coverage. The per-source coverage map says which sources are in and which are out, and why.

Monitoring a B2B competitor without an API

Manual, but cheap if you structure it. Four steps, repeated on a fixed day:

1. Resolve the company page you actually mean. Enterprises run regional pages, product pages and acquired-brand pages, and each one advertises separately.
2. Pull the advertiser view for a fixed country set and save what you see, dated. The year of retention means you are reading history, so the first pull is the most valuable one you will ever do.
3. Note format mix, not just messaging. A shift from single-image to document or thought-leader ads is a strategy change that copy analysis alone misses.
4. Follow the destinations. B2B ad landing pages reveal the offer, the gate and the sales motion, and they change more often than the ads pointing at them.

Because LinkedIn keeps a year, this is one of the few places where a single afternoon of work produces a real timeline rather than a snapshot. Do it once per quarter per competitor and you have something most of their own marketing team does not have.

What to pair it with

LinkedIn covers one channel of a B2B mix. The two that usually matter alongside it are search, where a competitor's paid keywords say what demand they are buying, and Google's own library for display and YouTube. Start with the Google Ads Transparency Center, and keep the country scope identical to the one you used on LinkedIn so the two views are comparable.

Where is the LinkedIn Ad Library?

At linkedin.com/ad-library. It is public and needs no LinkedIn advertising account.

How far back does the LinkedIn Ad Library go?

About one year of ads, which is longer than the commercial windows most platform libraries publish.

Does the LinkedIn Ad Library have an API?

No public one. LinkedIn's advertising APIs are granted for your own accounts and reporting, not for competitor ad research, so ad library monitoring is manual unless a vendor has an approved product grant.

Does it show who a competitor targeted?

For ads delivered in the EU it shows the transparency disclosures required there, including targeting parameters and reach. Outside the EU you see the creative, not the audience.