How to find out which agency runs a brand's marketing

Updated 2026-10-06 by the Cofoundr team

Knowing a brand's agency matters for sales outreach, competitive research and hiring. Companies rarely announce it, but the evidence is public if you know where to look.

1. Agency case studies and client pages

Agencies publish their work. Search the brand name together with the words case study or client, and check the portfolio pages of agencies in the same city and industry. A named case study is the strongest public evidence.

2. The Meta Ad Library

Search the brand in the Meta Ad Library to see its active ads, formats and how long they have run. Ads that look like a consistent system often point to an agency or in-house team, though the library does not name who built them.

3. Google Ads Transparency Center

Google's Ads Transparency Center shows the ads a verified advertiser has run, searchable by name or domain.

4. Job posts and team pages

A brand hiring several marketing roles may be building in-house. A brand with no marketers listed but heavy advertising is more likely to use an agency.

5. A directory that shows the evidence

The Cofoundr Agency Directory collects publicly evidenced relationships between brands and agencies, with the source link and a confidence label on every claim, plus advertising links and hiring signals. Browse agencies or brands, or search any name.

A note on certainty

Public evidence shows a relationship existed when it was published, not that it is current. Treat every claim as a lead to confirm.

Frequently asked questions