# Data Clean Rooms & Zero-Party Data — Position Record From a 2023 grab-bag pairing of zero-party data with Web3 and NFTs to a sharper 2026 distinction: a clean room is only the venue, not the deliverable — the real work is the output policy governing what leaves it, and privacy-enhancing tech is a technique, not a substitute for that policy decision. > Markdown twin of https://nofluffadvisory.com/thinking/data-clean-rooms-zero-party-data/ — the Position Record for Data clean rooms + Zero-party data. Generated from the verified position ledger; methodology: https://nofluffadvisory.com/thinking/ ## Current positions **Data clean rooms** — Retail media is the vertical where clean-room verification is hardening fastest — becoming the buyer's independent check against network-reported outcomes. > “Retail media is where this is hardening fastest” — [How clean rooms will power the future of digital marketing in 2025?](https://nofluffadvisory.com/writing/how-clean-rooms-will-power-the-future-of-digital-marketing-in-2025/), Jul 12, 2026 **Zero-party data** — Zero-party data — proactively shared by the customer — is the highest-quality, most valuable data a brand can hold. > “In many cases, it's the cleanest data there is which also makes it the most valuable.” — [Data clean rooms and zero-party data: Powerful solutions for a cookie-less future](https://nofluffadvisory.com/writing/data-clean-rooms-and-zero-party-data-powerful-solutions-for-a-cookie-less-future/), Nov 7, 2023 11 positions tracked · held since Jul 12, 2026 · record spans Feb 27, 2023 – Jul 12, 2026 **Verified tensions:** none currently recorded between the positions on this page. That is a statement about what the ledger has verified — not the result of an exhaustive contradiction analysis. ## Coverage gap, disclosed Every verified position below is either still holding or was confirmed by a later event — no confirmed win yet; no retracted position yet. That's not because Evgeny's thinking never reverses or leaves a question open elsewhere on this site; this topic's own record simply hasn't reached one yet. Rather than manufacture a loss or an open call to look complete, this page stays visibly partial until a real one earns its place. ## The timeline — newest first ### Jul 12, 2026 — Claim — Current · Data clean rooms Retail media is the vertical where clean-room verification is hardening fastest — becoming the buyer's independent check against network-reported outcomes. > “Retail media is where this is hardening fastest” — [How clean rooms will power the future of digital marketing in 2025?](https://nofluffadvisory.com/writing/how-clean-rooms-will-power-the-future-of-digital-marketing-in-2025/), Jul 12, 2026 - Status: current — no change since Jul 12, 2026. ### Jun 13, 2026 — Framework — Current · Data clean rooms A clean room is the venue where two mutually distrusting parties agree to trust a process — the mature 2026 definition, replacing the 2023 framing of the room itself as the deliverable. > “A clean room is where two parties who do not trust each other's infrastructure agree to trust a process.” — [standards/data-clean-rooms-pets-interoperability](https://nofluffadvisory.com/standards/data-clean-rooms-pets-interoperability/), Jun 13, 2026 - Status: current — no change since Jun 13, 2026. ### Jun 13, 2026 — Framework — Current · Data clean rooms Output policy — not the clean room itself — is the actual deliverable of a clean-room deployment; the room is only the venue. > “Output policy is the product. The room is the venue; what leaves it is what you actually shipped.” — [standards/data-clean-rooms-pets-interoperability](https://nofluffadvisory.com/standards/data-clean-rooms-pets-interoperability/), Jun 13, 2026 - Status: current — no change since Jun 13, 2026. ### Jun 13, 2026 — Claim — Current · Data clean rooms A clean room deployed without output policy is only superficially safe — the room's walls were never the hard part; the door is. > “A clean room without output policy is just a safer room with an unsafe door.” — [standards/data-clean-rooms-pets-interoperability](https://nofluffadvisory.com/standards/data-clean-rooms-pets-interoperability/), Jun 13, 2026 - Status: current — no change since Jun 13, 2026. ### Jun 13, 2026 — Claim — Current · Data clean rooms Ev's operating distinction for evaluating clean-room initiatives: teams that stop at deploying the room have bought a venue; teams that build the output policy have shipped a product. > “Teams that treat the room as the deliverable buy a venue; teams that treat the output policy as the deliverable ship a product.” — [standards/data-clean-rooms-pets-interoperability](https://nofluffadvisory.com/standards/data-clean-rooms-pets-interoperability/), Jun 13, 2026 - Status: current — no change since Jun 13, 2026. ### Jun 13, 2026 — Framework — Current · Data clean rooms PETs and policy are not the same layer: privacy-enhancing technologies are techniques, but policy is a decision, and a clean room needs both — only one of which ships in the box. > “PETs are techniques. Policy is a decision. A clean room needs both — and only one of them ships in the box.” — [standards/data-clean-rooms-pets-interoperability](https://nofluffadvisory.com/standards/data-clean-rooms-pets-interoperability/), Jun 13, 2026 - Status: current — no change since Jun 13, 2026. ### Nov 7, 2023 — Claim — Current · Zero-party data Zero-party data — proactively shared by the customer — is the highest-quality, most valuable data a brand can hold. > “In many cases, it's the cleanest data there is which also makes it the most valuable.” — [Data clean rooms and zero-party data: Powerful solutions for a cookie-less future](https://nofluffadvisory.com/writing/data-clean-rooms-and-zero-party-data-powerful-solutions-for-a-cookie-less-future/), Nov 7, 2023 - Status: current — no change since Nov 7, 2023. ### Nov 7, 2023 — Framework — Superseded (refined) · Data clean rooms Post-cookie identity resolution is a bundled stack — zero-party data plus clean rooms under a permission-marketing operating principle — not either technique alone, and only the opening move. > “permission marketing might be the way forward and solutions like zero-party data and clean rooms will just be the beginning” — [Data clean rooms and zero-party data: Powerful solutions for a cookie-less future](https://nofluffadvisory.com/writing/data-clean-rooms-and-zero-party-data-powerful-solutions-for-a-cookie-less-future/), Nov 7, 2023 - Refined by: “Output policy — not the clean room itself — is the actual deliverable of a clean-room deployment; the room is only the venue.” (Jun 13, 2026) ### Mar 27, 2023 — Claim — Superseded (refined) · Data clean rooms Clean rooms are secure, privacy-preserving environments for cross-source data collaboration — Ev's first framing of the category, stated with no output-governance caveat. > “Clean rooms are secure data environments that enable companies to bring together data from multiple sources without compromising customer privacy.” — [How clean rooms will power the future of digital marketing in 2025?](https://nofluffadvisory.com/writing/how-clean-rooms-will-power-the-future-of-digital-marketing-in-2025/), Mar 27, 2023 - Refined by: “A clean room is the venue where two mutually distrusting parties agree to trust a process — the mature 2026 definition, replacing the 2023 framing of the room itself as the deliverable.” (Jun 13, 2026) ### Mar 27, 2023 — Call — Superseded (refined) · Data clean rooms Ev's 2023 forward call: clean rooms will be critical to digital marketing by 2025, delivering better targeting, attribution, and customer insight — framed as sufficient in themselves. > “In summary, clean rooms will be critical for digital marketing in 2025, enabling companies to access valuable customer insights while maintaining data privacy.” — [How clean rooms will power the future of digital marketing in 2025?](https://nofluffadvisory.com/writing/how-clean-rooms-will-power-the-future-of-digital-marketing-in-2025/), Mar 27, 2023 - Refined by: “Output policy — not the clean room itself — is the actual deliverable of a clean-room deployment; the room is only the venue.” (Jun 13, 2026) ### Feb 27, 2023 — Call — Unresolved · Zero-party data Zero-party data combined with Web3, NFTs, and blockchain technology has the potential to transform digital marketing — Ev's earliest recorded ZPD position, and one never revisited by his later ZPD/clean-room writing. > “ZDP in conjunction with Web3, NFTs, and blockchain technology have the potential to transform the way we think about digital marketing.” — [How brands should utilise zero party data (ZPD) as part of marketing strategy in 2023 and beyond?](https://nofluffadvisory.com/writing/how-brands-should-utilise-zero-party-data-zpd-as-part-of-marketing-strategy-in-2/), Feb 27, 2023 - Status: unresolved — a falsifiable call awaiting an event. When it resolves, it becomes a confirmation or a retraction here. ## Where the verified record ends The verified record for Data clean rooms + Zero-party data currently ends at **Jul 12, 2026**. No unverified candidate rows are pending for these concepts. Nothing beyond that date, and nothing outside these verified rows, is claimed here. --- 11 of 111 total verified ledger rows shown here, filtered to Data clean rooms + Zero-party data. Built against corpus revision `d5aebe0` — every row passed `verification.state === 'verified'` before it was allowed to render. Receipts are verbatim; superseded and retracted rows are marked, never presented as current. Methodology: https://nofluffadvisory.com/thinking/