Zefr Says It's MRC Accredited. For One Platform, Not Two.
Zefr, the brand-safety measurement company, says it is MRC accredited. The MRC does not accredit companies at all, only specific metrics in specific environments, so the phrase can be accurate and still tell a buyer almost nothing about what was reviewed.
Read the full issue on ADOTAT →What the issue found
- The Media Rating Council accredits specific reported metrics within set environments, devices and geographies, not companies or whole services.
- ADOTAT spent two weeks testing what "we're MRC accredited" covers, using Zefr as the test case.
- The MRC confirmed VideoAmp withdrew from accreditation review in June 2026, not July as widely reported.
- No source could point to a local CTV attribution report that independently verifies results beyond confirming the ad ran.
- No party has confirmed talks on a Mediaocean tie-up with the combined Nielsen and DoubleVerify measurement business.
Unmeasured takes apart one TV measurement number every week. Subscribe free to get it on Tuesdays.
More from Unmeasured
- Nielsen Crowns YouTube the Top TV Streamer. YouTube TV Counts as Cable. · November 3, 2026
- Comscore Says Linear Holds 78% of TV Ad Time. Streaming Just Took Most of the Primetime Upfront. · October 27, 2026
- VideoAmp Sells AI as Proof. An Investor Wrote Its Stake Down 80%. · October 20, 2026
- Nielsen Sells DoubleVerify as Independence. Its Contract Lets It Refuse a Firewall. · October 14, 2026
- CIMM Gave TV Currency 18 Months To Get Its Act Together. Including Itself. · October 6, 2026