LinkedIn Ad Library Search
Look up any company in LinkedIn's public ad library and see the B2B campaigns they're running — no LinkedIn account needed.
3 free searches per day, no sign-up. Results come straight from the official ad transparency libraries via the Captapi API.
How to use it
- 1
Enter a company name
As it appears on their LinkedIn page, e.g. “HubSpot”.
- 2
Search the library
We query LinkedIn's public ad transparency database.
- 3
Study the ads
Creatives, copy, and formats for each running ad.
- 4
Monitor via API
Track competitors weekly with the JSON endpoint.
Why the LinkedIn Ad Library is a B2B goldmine
LinkedIn ads are expensive — CPCs routinely run 3-5× higher than Meta — so companies only keep campaigns running when the pipeline math works. That makes the Ad Library unusually honest: if a competitor has run the same demo-offer ad for four months, that ad is booking meetings. Study what your category leaders lead with (free tools, benchmark reports, webinars, straight demo asks), which personas their copy addresses, and whether they spend on brand or direct response.
Turning ad research into a repeatable process
- Build a competitor list of 10-20 advertisers in your category.
- Check monthly: new creatives signal new positioning or campaigns worth noting.
- Save long-runners: ads that survive months are validated messaging.
- Compare cross-platform: check the same brands in the Facebook Ad Library and TikTok Ad Library to see where they invest.
To automate this, the LinkedIn Ad Library API returns the same results as clean JSON — pipe it into a sheet, a Slack digest, or an AI summarizer.
Frequently asked questions
What is the LinkedIn Ad Library?+
The LinkedIn Ad Library is LinkedIn's public ad transparency database, launched to comply with the EU's Digital Services Act. It lets anyone look up the ads a company is running on LinkedIn. This tool searches it by advertiser name and shows the results without requiring a LinkedIn account.
How do I see a competitor's LinkedIn ads?+
Enter the company's name as it appears on their LinkedIn page. You'll see their currently running and recent ads with creatives and copy. You can optionally add a keyword to filter their ads down to a specific product or campaign.
Is this legal?+
Yes — the Ad Library is a public transparency surface that exists for exactly this kind of research. No scraping of private data is involved.
Why can't I find a company's ads?+
Either the company isn't currently running LinkedIn ads, or their advertiser name differs from what you searched (try the exact name on their LinkedIn company page). Very new ads can also take time to appear in the library.
What can B2B marketers learn from the library?+
Which competitors are investing in LinkedIn at all, what offers they lead with (demos, reports, webinars), which formats they use (single image vs video vs carousel), and how their messaging targets different personas. Long-running ads reveal what actually converts in your category.
How many free searches do I get?+
3 free searches per day without an account. For programmatic access — competitor monitoring, spreadsheets, AI agents — a free API key includes 100 credits.
Monitoring competitor campaigns at scale?
Captapi's Ad Library APIs cover LinkedIn, Facebook/Meta, TikTok, and Google — advertiser search and ad details as clean JSON. Start free with 100 credits.
- 100 free credits, no card required
- 178 endpoints across 32 platforms
- Clean JSON — MCP, CLI, and n8n ready