EVENTS · October 7 & 8 – Media Buying Innovators · November 25 – Marketing Effectiveness Innovators · February 2 – Open Garden Innovators ·

THE BIG STORY

OpenAI's Business Hub gives brands their first real measure of ChatGPT visibility

Nov 10, 2026

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4 min read

OpenAI's Business Hub gives brands their first real measure of ChatGPT visibility

Mentions, website clicks and conversation topics let marketers check GEO tools against actual usage, though OpenAI shares no conversations and doesn't yet measure sales impact.

Nicolas Jaimes

WORTH A READ

Nov 4, 2026

ChatGPT Ads gives French buyers more tools after two months, but context stays hidden

Buying partners, conversion optimization and third-party measurement have arrived, but buyers still lack controls, context visibility and some announced features, Jellyfish and Havas Market say.

Nov 9, 2026

With Publicis now owning LiveRamp, the alternatives are being built piece by piece

LiveRamp bundles three services rivals rarely offer together, and replacing the tools won't replace the audiences and partner connections built around them.

Nov 10, 2026

On our radar: Alembic wants to go beyond MMM to show how campaigns actually drive sales

Alembic says it can quantify how TV drives Google searches, then site visits, then sales, so brands can allocate their budgets better. Marketers who have to defend their spend to the CFO may bite, provided the platform can show what it adds to the MMM they already run.

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OPEN MEDIA

Open Media

With Publicis now owning LiveRamp, the alternatives are being built piece by piece

Nov 9, 2026

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5 min read

With Publicis now owning LiveRamp, the alternatives are being built piece by piece

LiveRamp bundles three services rivals rarely offer together, and replacing the tools won't replace the audiences and partner connections built around them.

Nicolas Jaimes

Open Media

Apple's iOS 27 block wipes out ad IDs, but the cost is still hard to pin down

Oct 20, 2026

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4 min read

Apple's iOS 27 block wipes out ad IDs, but the cost is still hard to pin down

After French ad monetization platform Hubvisor flagged a drop in bid responses, a Pubstack analysis shared with Open Garden tracks several identifiers disappearing on iOS 27. Apple is now spelling out the tracking it wants to block, while the impact on CPMs remains hard to isolate.

Nicolas Jaimes

Open Media

SSPs are answering 30% fewer ad requests on Safari iOS, and Apple may be why

Oct 14, 2026

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2 min read

SSPs are answering 30% fewer ad requests on Safari iOS, and Apple may be why

The drop, flagged by French ad monetization platform Hubvisor, began Oct. 1, two weeks after iOS 27 shipped, timing that fits a blocklist Apple can update remotely.

Nicolas Jaimes

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AI FOR MEDIA

AI for media

Nov 10, 2026

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4 min read

OpenAI's Business Hub gives brands their first real measure of ChatGPT visibility

Mentions, website clicks and conversation topics let marketers check GEO tools against actual usage, though OpenAI shares no conversations and doesn't yet measure sales impact.

Nicolas Jaimes

AI for media

ChatGPT Ads gives French buyers more tools after two months, but context stays hidden

Nov 4, 2026

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6 min read

ChatGPT Ads gives French buyers more tools after two months, but context stays hidden

Buying partners, conversion optimization and third-party measurement have arrived, but buyers still lack controls, context visibility and some announced features, Jellyfish and Havas Market say.

Nicolas Jaimes

AI for media

The media buyer of 2030 trades execution for judgment

Oct 14, 2026

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9 min read

The media buyer of 2030 trades execution for judgment

Agency executives Open Garden interviewed expect less setup and reporting, but a job that stays technical, where buyers still need to know the platforms they no longer run day to day.

Nicolas Jaimes

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UNDER THE HOOD

Under the hood

Jan 7, 2026

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3 min read

Under the hood: how Values.media bought its first TV campaign through an AI agent and AdCP

A Claude-based buying agent and a seller agent built by Teknalab.ai handled a €2,000 health campaign on Adtlas from brief to reporting, a first in France.

Nicolas Jaimes

Watch the demos

CTV

French broadcasters fold streaming into TV buys and start wiring in AI agents

Sep 22, 2026

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5 min read

French broadcasters fold streaming into TV buys and start wiring in AI agents

TF1 Pub, FranceTV Publicité, M6 Unlimited and Canal+ Brand Solutions are also pushing more inventory into self-serve, and FranceTV now sells CTV on estimated viewers rather than impressions.

Nicolas Jaimes

CTV

Maurits Abrahamjan (Abovo Maxlead): "Agentic let us run a CTV campaign from one single environment: our Mediavision AI platform"

Apr 8, 2026

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3 min read

Maurits Abrahamjan (Abovo Maxlead): "Agentic let us run a CTV campaign from one single environment: our Mediavision AI platform"

Abovo Maxlead connected its Mediavision AI to PubMatic's AgenticOS to automate a broad slice of programmatic buying. Data, campaigns and tools sit in one place, wired to the market through OpenRTB. The result: largely automated activation and optimisation, with claimed setup gains of 87%.

Nicolas Jaimes

CTV

Martin Lawson (Origin): "Amazon and TikTok will join our cross-media and video measurement, and we hope to have BVOD/SVOD before the end of the year"

Mar 25, 2026

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2 min read

Martin Lawson (Origin): "Amazon and TikTok will join our cross-media and video measurement, and we hope to have BVOD/SVOD before the end of the year"

Origin, the ISBA-backed cross-media measurement project, went live in the UK in July and now serves 69 advertisers. Its director details the roadmap: Amazon, TikTok, a VOD solution covering BVOD and SVOD, an API for agencies, and warming relations with broadcasters.

Nicolas Jaimes

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RETAIL MEDIA

Retail media

Amazon Ads now lets brands target Walmart, Kroger and Sephora shoppers

Nov 4, 2026

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2 min read

Amazon Ads now lets brands target Walmart, Kroger and Sephora shoppers

The Attain integration feeds Amazon purchase data from rival stores and shows retailers they aren't the only ones who can monetize what they know about their shoppers.

Nicolas Jaimes

Retail media

Oct 23, 2026

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3 min read

Unlimitail signs Coopérative U, tightening its hold on French grocery retail media

From January 2027, Unlimitail will sell U's digital ad inventory alongside Carrefour's, and buyers will judge the deal on retailer choice, pricing and self-service access.

Nicolas Jaimes

Retail media

Sep 28, 2026

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4 min read

Magenta wants AI agents to run retail media buying across every network

Datagram co-founder Dali Ben Aleya has opened his agentic platform commercially with several CPG advertisers and a media agency as early partners, betting that agents can cut the cost of spreading budgets across retailers, including the ones still running on email and Excel.

Nicolas Jaimes

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