Netflix, Lego and P&G In-House Ad Tech: What They Built

Netflix built its own ad server and planning APIs but rents every DSP it sells through. Lego is hiring an in-house programmatic team while Publicis One keeps global media. P&G in-housed media planning, some buying and its consumer data, and still buys through third-party platforms. None of the three built a bidder. This page maps each layer with dated sources.

• Own means the company built or operates the layer itself, with public evidence.
• Rent means a third party provides the layer under contract.
• Hybrid means both, with the split described in the cell.
• n/d means not disclosed in any public source we could find. We do not guess.
• Netflix is a media owner selling ads; Lego and P&G are advertisers buying them. The layers are the same, but the direction of money differs, so read Netflix's "DSP" row as "which DSPs it sells through". The layers follow the chain described in RTB architecture explained.

Netflix is the clearest case because it reports to shareholders every quarter. The sequence is dated and public.

Three things stand out.

First, the thing Netflix built is the ad server and the data layer, not a bidder. The Ads Suite decides which ad plays in a Netflix stream and exposes Netflix data through APIs. Demand still arrives through other companies' DSPs. Netflix never announced its own DSP and, as a seller, has no reason to.

Second, the supply path is still partly rented. In March 2025 the SSP inside the Ads Suite was Magnite (AdExchanger, 18 March 2025). By July 2026 Netflix inventory was selectable inside The Trade Desk's marketplace without a private deal (PPC Land, 20 July 2026). Netflix has not published how that path is wired, so we mark the SSP layer "hybrid" rather than guess.

Third, Netflix de-risked by multiplying partners. It started with Microsoft as its only programmatic seller (AdExchanger, 15 May 2024). When Microsoft announced on 14 May 2025 that Invest would close on 28 February 2026 (PPC Land, 22 June 2025), Netflix already had four other DSP partners and its own ad server. A buyer that depended on Invest had no such cushion; see life after Microsoft Invest.

What Netflix kept outsourced: every DSP, the clean rooms (Snowflake, AWS, InfoSum), third-party audiences (Amazon, Yahoo), most measurement (over 50 vendors, Netflix, 5 November 2025) and, at least in 2025, the SSP. What it owns: the ad server, the member data and the APIs on top of it, the Conversion API, and the creative tooling.

Lego's case is about people and contracts, not software. The public record comes from two Digiday reports.

Lego has not named a DSP, an ad server, a CDP or a clean room in any public statement we found. Its January 2026 job listings asked for hands-on experience with specific DSPs, but the listings were no longer live when we checked on 17 October 2026, so we do not name them in the matrix. What Lego owns, on the evidence, is the creative function (The Lego Agency since 2014, Digiday, 4 February 2026) and a growing trading team. What it rents is everything else, including the global media contract itself.

The Lego pattern matches what Digiday's broader reporting describes: brands keep agencies for programmatic scale, national TV and strategy, then pull specific trading work in-house where they have first-party signal, which for Lego is DTC (Digiday, 9 February 2026). Georgia-Pacific's digital media lead told Digiday that recruiting and retaining specialized programmatic talent was among its biggest challenges, and Lego's own "next couple of years" framing says the same thing.

P&G is the largest advertiser in this set. Its advertising expense was $9.2 billion in fiscal 2025 (P&G Form 10-K, FY2025). Marc Pritchard has described the in-housing program in stages since 2019.

Read together, the statements describe a specific split. P&G owns the data (its consumer ID database), the decision logic (proprietary algorithms, smart audiences, the retail media auto-bidder), the planning function and, in a growing number of countries, the buying desk. It does not claim to own an ad server, a bidder or a clean room, and it has never named the DSPs it buys through. Pritchard's 2019 line is still the operating principle: execution can sit with P&G people or an agency, as long as the planning and the data sit with P&G (AdExchanger, 7 October 2019).

Two cautions on the P&G numbers. The "at least 10% a year" figure is Pritchard's own claim and has not been independently audited (MediaPost, 20 March 2024). The 2020 "90% digital, 80% programmatic" line is as Marketing Dive reported it (Marketing Dive, 25 September 2020); we could not find a primary transcript, so treat it as reported rather than verified.

The pattern is consistent. Nobody in this set built a bidder. The company with the most engineering capacity, Netflix, built the layer that sits on its own first-party data (the ad server) and the APIs that expose that data, then connected to every major DSP. The two advertisers built on their data and their people, and left the pipes to vendors.

A mid-size advertiser cannot copy Netflix's engineering budget or P&G's $9.2 billion of advertising expense (P&G Form 10-K, FY2025). It can copy the logic.

1. Decide layer by layer, not with one word. Use the nine rows above as a checklist. Each row has a different cost, a different talent requirement and a different exit. Our bidder-as-a-service vs white-label vs self-hosted DSP comparison covers the bidder row in detail; how to build a DSP platform covers what a full build involves.
2. Own the data and the decision logic before you own any pipe. P&G's consumer IDs and algorithms, and Netflix's Audience Insights API, are the assets that produced the reported gains. The 2023 Pampers figures (US sales +10%, ROI +17%, media costs −15%) came from audiences built on first-party data and a proprietary algorithm, not from a new bidder (Marketing Dive, 17 February 2023). For the data layer choice, see clean rooms vs CDP for the enterprise.
3. Get the logs, whoever runs the bidder. The ANA study behind Pritchard's "36 cents" line was built on log-level data from 21 advertisers out of 67 that wanted to take part (ANA, 5 December 2023). In the Q2 2026 benchmark, working media reached 45.1% and transaction costs 27.2% (ANA Q2 2026 benchmark, 6 August 2026). You cannot see your own number without the logs. Put log access in the contract; our DSP RFP template has the questions.
4. Plan for talent over years, not quarters. Lego's "next couple of years" and Georgia-Pacific's retention problem are the norm (Digiday, 4 February 2026; Digiday, 9 February 2026). A hybrid with an agency, which is what Lego and P&G both run, is the realistic starting state.
5. Keep more than one demand path. Netflix had five DSP partners when Microsoft Invest closed. A buyer with one DSP contract has a migration project when that happens. Exit terms belong in the RFP, and the Microsoft Invest migration playbook shows what the project looks like.
6. Measure working media, not fee rates. The ANA's 2026 practitioner survey found only 9% of in-house teams name cost savings as their primary role, down from 30% in 2023 (Basis, 29 July 2026). Control and transparency are now the stated reasons. The right KPI is the share of each dollar that becomes a qualified impression, which is what DSP pricing explained and the ad tech tax break down.

The in-housing surveys are older than they look, and they measure different things. Show the dates when you cite them.

The ANA 2023 figures conflict (13% in Digiday, 9 February 2026 vs 32% in Basis, 29 July 2026) because they come from different ANA studies with different definitions, one on media units and one on in-house agencies. We show both.

Does Netflix have its own DSP? No. Netflix built its own ad server, the Netflix Ads Suite, and sells its inventory through third-party DSPs: The Trade Desk, Google DV360, Yahoo DSP, Amazon DSP and AJA (Netflix, 5 November 2025). Microsoft was a partner until Microsoft Invest closed on 28 February 2026 (PPC Land, 22 June 2025). A media owner has no reason to run a buy-side bidder.

What is the Netflix Ads Suite? It is Netflix's proprietary first-party ad tech platform: an ad server and data layer that launched in the US on 1 April 2025 and in all ads markets by July 2025 (Netflix Q1 2025 letter, 17 April 2025; Q2 2025 letter, 17 July 2025). In March 2025 it was described as Netflix's own ad server plus Magnite as the SSP (AdExchanger, 18 March 2025). By May 2026 it exposed an Audience Insights API and a Reach Curve API and powered programmatic Pause Ads and Live (Netflix, 13 May 2026).

Did Lego bring programmatic in-house? Partly. Lego already ran programmatic and search for its direct-to-consumer business in-house in October 2024, and in January 2026 advertised five programmatic roles in the US and Denmark to build a wider in-house digital paid media team over "the next couple of years" (Digiday, 15 October 2024; Digiday, 4 February 2026). Publicis One remains the global media agency and Lego says the build is done in partnership with Publicis Media.

How much does P&G save by in-housing media? Marc Pritchard has said in-house media is "saving us at least 10% a year" in every brand country where P&G runs it (MediaPost, 20 March 2024). Earlier he put the fabric-care unit's saving at $65 million in one year (Marketing Dive, 17 February 2023). Both are company claims. P&G's advertising expense was $9.2 billion in fiscal 2025 (P&G Form 10-K, FY2025).

What percentage of brands have brought programmatic in-house? It depends on the survey and the year. The IAB found 65% of US brands fully or partially in-house in May 2018 and, with Accenture, 69% internationally by 2020 (IAB, 22 May 2018; AList Daily, 7 August 2020). The ANA's 2023 benchmark found 13% of US brands run programmatic fully in-house and 26% use a hybrid (Digiday, 9 February 2026). The lower ANA figure counts full ownership; the IAB figures count any step toward it.

1. AdExchanger, "Netflix Is Launching Its Own Ad Tech" (15 May 2024). https://www.adexchanger.com/tv/netflix-is-launching-its-own-ad-tech/
2. PPC Land, "Netflix opens its ad inventory to The Trade Desk, Google DV360 & Magnite" (16 May 2024). https://ppc.land/netflix-goes-programmatic-new-ad-partners-open-doors/
3. AdExchanger, "Meet The Netflix Ads Suite, Introduced By Ads VP Nicolle Pangis" (18 March 2025). https://www.adexchanger.com/tv/meet-the-netflix-ad-suite-introduced-by-ads-vp-nicolle-pangis/
4. Netflix, Q1 2025 shareholder letter, Form 8-K exhibit (17 April 2025). https://www.sec.gov/Archives/edgar/data/1065280/000106528025000175/ex991_q125.htm
5. PPC Land, "Netflix adds Yahoo DSP as fourth global programmatic advertising partner" (16 June 2025). https://ppc.land/netflix-adds-yahoo-dsp-as-fourth-global-programmatic-advertising-partner/
6. Netflix, Q2 2025 shareholder letter (17 July 2025). https://www.sec.gov/Archives/edgar/data/1065280/000106528025000322/ex991_q225.htm
7. PPC Land, "Netflix becomes available in Amazon DSP starting Q4 2025" (10 September 2025). https://ppc.land/netflix-becomes-available-in-amazon-dsp-starting-q4-2025/
8. Netflix, "Netflix's Third Season of Ads and a Look Ahead at What's Next" (5 November 2025). https://about.netflix.com/en/news/netflix-third-season-of-ads-and-a-look-ahead-at-whats-next
9. Netflix, Q4 2025 shareholder letter (20 January 2026). https://www.sec.gov/Archives/edgar/data/1065280/000106528026000033/ex991_q425.htm
10. PPC Land, "Netflix Ads gets Amazon audiences, Yahoo signals, and its own conversion API" (6 March 2026). https://ppc.land/netflix-ads-gets-amazon-audiences-yahoo-signals-and-its-own-conversion-api/
11. Netflix, Q1 2026 shareholder letter (16 April 2026). https://www.sec.gov/Archives/edgar/data/1065280/000106528026000137/ex991_q126.htm
12. Netflix, "Netflix Upfront 2026: Get Closer" (13 May 2026). http://about.netflix.com/en/news/netflix-upfront-2026-get-closer
13. PPC Land, "Netflix 2026 upfront: 250M viewers, AI agents, and 15 new ad markets" (14 May 2026). https://ppc.land/netflix-2026-upfront-250m-viewers-ai-agents-and-15-new-ad-markets/
14. Netflix, Q2 2026 shareholder letter (16 July 2026). https://www.sec.gov/Archives/edgar/data/0001065280/000106528026000211/ex991_q226.htm
15. PPC Land, "Netflix opens 250M-user inventory to Trade Desk buyers, drops spend minimums" (20 July 2026). https://ppc.land/netflix-opens-250m-user-inventory-to-trade-desk-buyers-drops-spend-minimums/
16. MediaPost, "Microsoft To Shutter DSP, Formerly Xandr" (14 May 2025). https://www.mediapost.com/publications/article/405873/microsoft-to-shutter-dsp-formerly-xandr-replace.html
17. PPC Land, "Microsoft's Xandr DSP closure opens doors for independent players" (22 June 2025). https://ppc.land/microsofts-xandr-dsp-closure-opens-doors-for-independent-players/
18. Digiday, "Lego considers bringing more media in-house after appointing Publicis One to handle global media" (15 October 2024). https://digiday.com/marketing/lego-considers-bringing-more-media-in-house-after-appointing-publicis-one-to-handle-global-media/
19. Digiday, "Lego is building out an in-house programmatic team" (4 February 2026). https://digiday.com/media-buying/lego-is-building-out-an-in-house-programmatic-team/
20. Digiday, "The case for and against bringing programmatic in-house" (9 February 2026). https://digiday.com/media-buying/the-case-for-and-against-bringing-programmatic-in-house/
21. AdExchanger, "After Transparency, P&G's Pritchard Has A New Mission: Getting A Signal Into The Walled Gardens" (7 October 2019). https://www.adexchanger.com/online-advertising/after-transparency-pgs-pritchard-has-a-new-mission-getting-a-signal-into-the-walled-gardens/
22. Marketing Dive, "Pritchard: P&G is taking control in the media supply chain" (25 September 2020). https://www.marketingdive.com/news/pritchard-pg-is-taking-control-in-the-media-supply-chain-and-so-can-oth/585856/
23. Marketing Dive, "P&G's Pritchard says AI, algorithms are improving ad effectiveness" (17 February 2023). https://www.marketingdive.com/news/pg-marc-pritchard-ai-algorithm-marketing-media-efficiency/642986/
24. MediaPost, "P&G's 10% Solution: Integrating Reach, Effectiveness, Efficiency In Media Plans" (20 March 2024). https://www.mediapost.com/publications/article/394517/pgs-10-solution-integrating-reach-effectivene.html
25. Ad Age, "P&G's Marc Pritchard on 10% in-house media savings and wanting better measurement" (March 2024). https://adage.com/article/media/pgs-marc-pritchard-house-media-savings-measurement/2547711/
26. Beet.TV, "P&G's Marc Pritchard on Addressing the Complexities in the Advertising Industry" (28 October 2024). https://www.beet.tv/2024/10/pgs-marc-pritchard-on-addressing-the-complexities-in-the-advertising-industry.html
27. MediaPost, "Call For Reinvention: A Conversation With P&G's Marc Pritchard" (26 March 2026). https://www.mediapost.com/publications/article/413832/call-for-reinvention-a-conversation-with-pgs-ma.html
28. Marketing Dive, "P&G's Pritchard on how brands must navigate a new epoch in marketing" (27 March 2026). https://www.marketingdive.com/news/pgs-pritchard-on-how-brands-must-navigate-a-new-epoch-in-marketing/815940/
29. Procter & Gamble, Form 10-K for the fiscal year ended 30 June 2025. https://www.sec.gov/Archives/edgar/data/80424/000008042425000076/pg-20250630.htm
30. IAB, "Nearly Two-Thirds of Brands Purchasing Ads Through Programmatic Means Have Fully or Partially Moved the Function In-House" (22 May 2018). https://www.iab.com/news/nearly-two-thirds-of-brands-purchasing-ads-through-programmatic-means-have-fully-or-partially-moved-the-function-in-house-according-to-iab-research/
31. AList Daily, "69 Percent Of Brands Shift Programmatic In-House" on the IAB and Accenture Interactive report (7 August 2020). https://www.alistdaily.com/media/iab-international-inhouse-programmatic-report/
32. ANA, "The Resilient Rise of the In-House Agency: 2026 State of In-Housing Report" (22 June 2026). https://www.ana.net/miccontent/show/id/rr-2026-06-resilient-rise-in-house
33. Basis Technologies, "Everything You Need to Know About Programmatic In-Housing" (29 July 2026). https://basis.com/blog/everything-you-need-to-know-about-programmatic-in-housing
34. Bannerflow, "The State Of In-housing 2022" launch post (2022). https://www.bannerflow.com/blog/the-state-of-in-housing-2022-launch
35. ANA, Programmatic Media Supply Chain Transparency Study, complete report (5 December 2023). https://ana.net/programmatic
36. ANA Programmatic Transparency Benchmark, Q2 2026 findings, release reprinted by Fiducia (6 August 2026). https://www.fiducia.eco/post/ana-programmatic-transparency-benchmark-q2-2026-working-media-efficiency-reaches-a-record-45

• 18 October 2026: aligned the title and heading and applied recorded source-URL corrections where needed. Factual research cutoff remains 17 October 2026.

• 17 October 2026. First edition: nine layers, three companies, 14 dated Netflix events, 5 Lego events, 7 P&G statements, 6 survey rows. Next review 15 January 2027.