Microsoft Monetize (formerly Xandr): ad server and SSP status, pricing model and alternatives

Monetize serves publishers and sales houses. Microsoft's product page splits it into the "Monetize SSP" and the "Monetize Ad Server", which it says lets publishers own their "ad sales business, from decisioning to delivery" (Microsoft Advertising, accessed 9 November 2026). Its documentation describes inventory set-up, guaranteed line items, ad quality controls and forecasting for managed publishers (Microsoft Learn).

The question most users ask is whether it will last. The answer on 9 November 2026 is that Microsoft keeps shipping. Its October 2026 update added a Copilot "Deal Troubleshooting Agent", charts in Copilot reports and seven new OpenRTB signals (Microsoft Advertising blog, 21 October 2026). The same post says Copilot in Monetize is backed by the Model Context Protocol, announced earlier in 2026.

A publisher's page, app or CTV app calls Monetize through Microsoft's seller tag, SDK, Prebid.js adapter or a server-side partner. Monetize compares guaranteed line items with bids from outside DSPs and serves the winner. For server-side header bidding, Prebid Server Premium runs "on open-source Prebid Server Go" with "over 200 demand partners", but Microsoft says it "is not available to all customers" (Microsoft Learn). It has its own profile: Microsoft Prebid Server Premium.

Without its own DSP, Monetize now leans on outside buyers. Since August 2026 it passes OpenRTB 2.6 pod signals to DSPs, starting with The Trade Desk, and it applies Amazon's traffic-shaping advice to steer Amazon DSP demand to its inventory (Microsoft Advertising blog). LinkedIn data reaches CTV buyers through the same pipe. LinkedIn builds a segment, packages it as a PMP in Curate on top of Monetize supply, and Amazon DSP, The Trade Desk or Microsoft Advertising buys it (PPC Land, 14 May 2026).

Publishers have a deadline to note. Microsoft says the legacy AppNexus Prebid adapter will shut down in early 2027. Publishers should move to the Microsoft Prebid Adapter and Prebid.js 11.36.0 or later (Microsoft Advertising blog, 21 October 2026).

Microsoft does not publish Monetize, Curate or Prebid Server Premium prices, and its annual report does not break out the business. Contracts are negotiated. Ask for the SSP fee as a share of spend, any ad serving CPM, the Curate margin model and the cost of log-level data feeds.

Monetize gains on two fronts once a final judgment takes effect. As a rival publisher ad server it can receive real-time AdX bids for open-web display, and through Prebid Server Premium it sits on the Prebid path that Google must open to AdX (Memorandum Opinion, Dkt. 1858, pp. 58 and 62). The receiving integration still has to be built, and deadlines run from an Effective Date that did not exist on 9 November 2026.

Strengths

• Still developed. New features in 2026, including Copilot agents and OpenRTB 2.6 pod signals.
• Open demand. Microsoft says Monetize connects to "80+" DSPs (company claim).
• Prebid on Microsoft's servers. Prebid Server Premium runs the open-source Go server.
• Unique data partner. LinkedIn professional audiences flow through Curate deals.

Limits

• No owned DSP since February 2026. Demand depends on outside platforms.
• Regulatory history. Norway's data authority fined Xandr NOK 92 million in a decision dated 2 October 2026 over Grindr data from 2018 to 2020, finding it a joint controller (PPC Land, 13 October 2026).
• Ageing figures. Microsoft's publisher and DSP counts cite 2023 data.
• Adapter migration. Publishers on the AppNexus adapter must upgrade before early 2027.

• Any Monetize, Curate or Prebid Server Premium price.
• A Microsoft statement of long-term plans for Monetize and Curate; none found on Microsoft Learn or the Microsoft Advertising blog.
• Whether Xandr appealed the Norwegian decision.
• Current publisher counts; the "1600+" figure cites 2023 data.

1. Microsoft Advertising, "Work smarter this holiday season: What's new in Microsoft Monetize" (21 October 2026). https://about.ads.microsoft.com/en/blog/post/october-2026/work-smarter-this-holiday-season-what-new-in-microsoft-monetize
2. Microsoft Advertising, Microsoft Monetize product page (accessed 9 November 2026). https://about.ads.microsoft.com/en/solutions/technology/microsoft-monetize
3. Microsoft Advertising, Microsoft Curate product page (accessed 9 November 2026). https://about.ads.microsoft.com/en/solutions/technology/microsoft-curate
4. Microsoft Learn, "About Microsoft Monetize" (accessed 9 November 2026). https://learn.microsoft.com/en-us/xandr/monetize/about-monetize
5. Microsoft Learn, "Microsoft Monetize - Release notes" (last updated 2 April 2026). https://learn.microsoft.com/en-us/xandr/monetize/release-notes
6. Microsoft Learn, "Microsoft Curate - Release Notes" (last updated 21 January 2026). https://learn.microsoft.com/en-us/xandr/curate/release-notes-curate
7. Microsoft Learn, "Microsoft Invest - Release notes" (last updated 23 September 2025). https://learn.microsoft.com/en-us/xandr/invest/release-notes
8. Microsoft Learn, "Prebid Server Premium" (last updated 21 October 2025). https://learn.microsoft.com/en-us/xandr/monetize/prebid-server-premium
9. Microsoft Corporation, Form 10-K for fiscal year 2022 (filed 28 July 2022). https://www.sec.gov/Archives/edgar/data/789019/000156459022026876/msft-10k_20220630.htm
10. US Securities and Exchange Commission, EDGAR submissions record for Microsoft Corporation (accessed 9 November 2026). https://data.sec.gov/submissions/CIK0000789019.json