We make MessCube, which is on this list. Prices and coverage come from vendors' pages and recent reviews, checked on 23 October 2026. Several of the listings disagree with each other on exactly the point that matters for B2B, which platforms a tool covers, so test LinkedIn coverage on a free trial before paying.
Most ad intelligence tools were built for one buyer: the Shopify seller hunting Meta and TikTok ads. B2B is a different shape. The buying group is three to five roles, the budget is on LinkedIn and search, and a competitor that runs zero LinkedIn ads is itself a finding. So the first filter for a B2B marketer is simple: does the tool actually cover LinkedIn, and does it show Google next to it?
Start with the free libraries
The LinkedIn Ad Library is free and shows a company's current and recent ads. It publishes no start date for most ads outside the EU, no history and no spend; the full list of gaps is in what the LinkedIn Ad Library does not show. Google's Ads Transparency Center is free and shows every verified advertiser's ads with first-shown dates. Meta's Ad Library is free and the most complete of the three. If you have one competitor and an hour a week, the free libraries and a spreadsheet are an honest answer.
The tools that cover LinkedIn
AdSpyder. The cheapest clear LinkedIn coverage: a Spy tier listed at $10 a month that includes LinkedIn ads, higher tiers at $20, $30 and $99 adding Meta, YouTube and the rest, and a 7-day trial. Search limits by tier. Some directories list different plan names and prices, so check the page. What you get is search and a saved list; what you do not get is run length reconstructed for LinkedIn, or any interpretation.
AdLibrary (adlibrary.com). Credit-based plans at €29, €179 and €329 a month, claiming seven-plus platforms including LinkedIn, with AI summaries and an API on the top tier. Credits run out in a long research session. Coverage claims are the vendor's own.
PowerAdSpy. LinkedIn sits in a higher tier, reported from about $129 a month, in a range that runs to $399. No free tier. Broad platform list, thin on analysis.
MessCube. Reads LinkedIn, Google and Meta in one market read, keeps its own history so it can show run length on LinkedIn where the platform publishes none, labels every date by where it came from, reads Google ads as offers rather than hooks, and groups the market by angle. Free to start with a 15-ad preview per platform; the market read is $39 a month. Our own, so weigh accordingly; the measured claims are in the benchmark.
The tools that do not, or might not
Foreplay ($59 to $459 a month) is excellent for Meta and TikTok creative teams; sources disagree on whether it covers LinkedIn at all, and Google Search is not its strength. AdSpy ($149) is Meta and Instagram only. TrendTrack and Minea ($49 up) are Shopify and Meta tools with TikTok. Adbeat ($249 up) is display and native, no LinkedIn. If a listing tells you one of these covers LinkedIn, make it show you a competitor's LinkedIn ad with a date before you believe it.
The number none of them publishes
Spend. No public library publishes what an advertiser spends, and no tool can read it. What a good tool can do is estimate it from how many ads an advertiser runs and how long they run, show the estimate as a range, and say what it stands on. Anything that shows you a LinkedIn spend figure to the dollar is modelling and should say so.
A B2B reading list, in order
- Platform verdict first. Of your five closest competitors, how many run LinkedIn ads at all, how many, how old is the oldest. An empty column is a finding and leads to a decision.
- Then the story on LinkedIn. Which angles their ads share, which roles they are written for, which formats last. Thought-leader ads from a named person are their own category.
- Then the offer on Google. What they promise when your buyer searches, and where the ad lands. Search ads have no hook; read the offer.
- Then Meta, if anyone is there. For many B2B categories it is retargeting and nothing else, which is also worth knowing.
Whichever tool you pick, insist on three things: LinkedIn shown with dates or an honest "no date", Google in the same view, and absence labelled as "not observed" rather than as zero.