Performance Max agency comparison table
Detailed ranking of the best Performance Max agencies for 2026
1. datashake, Paris
Founded by two former Google employees, datashake supports companies with their digital marketing and data strategies, both in France and internationally, with long-standing and recognized expertise in SEA.
A Google Premier Partner, the group was selected to join the highly selective Google Partners International Growth Program. Based in Paris and New York, they have supported over 1,000 advertisers—60% of whom were expanding internationally—and managed over €500 million in media spend.
For Performance Max, datashake’s SEA experts optimize every placement across Google’s inventory according to its specific requirements: search themes for Search, product feeds and Merchant Center for Shopping, video for YouTube, visuals for Display, Discover, and Gmail, and business profiles for Maps. They rely on reliable measurement (server-side tracking, enhanced conversions) to steer the algorithm toward the most profitable conversions. Continuous A/B testing and detailed reporting are used to drive ongoing performance improvements.
Beyond SEA, the group brings together over 100 experts in SEO & GEO, SMA, AI-powered strategy and creative design, tracking & data, consulting, and training. Brands they have worked with include Chanel, Société Générale, Celio, Dermalogica, Agatha, Qonto, EDF, and Europcar.
Whether for e-commerce or lead generation, datashake is the go-to agency for Performance Max in 2026.
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2. Yateo, Paris
Yateo is a Google Premier Partner agency specializing in SEA and social ads, placing Google Shopping at the heart of its e-commerce campaigns.
It is a great choice for e-commerce advertisers looking to activate Performance Max on an already structured account, with management focused on return on investment.
3. Horizon, Paris
Horizon is a Google Ads and Social Ads agency that puts advertiser profitability at the heart of its management strategy.
It is a great choice for advertisers who want to activate Performance Max with a clear profitability goal, rather than a volume-based approach.
4. Convertix, Paris
Convertix is a multi-site agency that combines Google Ads, social ads, SEO, and growth marketing.
It is suitable for advertisers looking for a local partner who want to integrate Performance Max into a broader acquisition mix.
5. ID Interactive, Arradon
ID Interactive is a long-standing Google Partner agency that explicitly lists Performance Max among its services, alongside Shopping, Display, YouTube, and retargeting.
It is suitable for SMEs and e-commerce businesses that want proven Google Ads expertise and ROAS tracking, with Performance Max integrated into a multi-format setup.
6. Webloom, Paris
Webloom is an SEO and SEA agency, a Google Partner since 2019, comfortable with test-and-learn approaches and detailed channel-by-channel reporting. It is a great choice for lead gen and B2B advertisers who want to activate Performance Max in synergy with their SEO strategy, rather than focusing on e-commerce and Shopping.
7. Growth Room, Paris
Growth Room is a growth and acquisition agency, comfortable with testing and rapid scaling. It is a great choice for growing startups that want to activate Performance Max as part of a more comprehensive growth strategy, rather than just pure Google Ads management.
Why choosing the right Performance Max agency in 2026 matters
Automation and signals
Performance Max has become a unique format: it consolidates Google's inventory into a single campaign where the algorithm determines delivery, placement, and bidding. This automation is a strength, but it shifts the agency's role. Performance is no longer driven by manual adjustments, but by the inputs provided to the algorithm.
PMax and conversion data
The quality of your conversion data—server-side tracking, Enhanced Conversions, and actual conversion values—determines everything else. A PMax campaign fed with poor signals optimizes in a vacuum, regardless of the quality of the rest of the account.
The importance of the product feed
For e-commerce, managing the product feed (Merchant Center, titles, attributes, exclusions) is the true fuel for a PMax Shopping campaign. An agency that doesn't optimize the feed leaves the algorithm to run on a poor database.
Criteria for selecting a Performance Max agency
Essential skills
- True paid media specialization, rather than paid media as a secondary service buried within a 360-degree offering.
- Mastery of data and tracking, an essential prerequisite for steering PMax based on conversion value.
- Feed and Merchant Center expertise for e-commerce accounts.
- Controlling the PMax black box (asset groups, audience signals, placement and brand exclusions).
Quality signals to verify
- Reporting transparency, specifically the ability to extract performance by channel and asset group despite PMax's native opacity.
- Measurable results and the ability to scale without degrading ROAS.
- Consistency between PMax and the rest of the account (Brand Search, Shopping) to avoid cannibalization.
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Detailed comparison of Performance Max agencies
Strengths and limitations by agency
Budgets and return on investment
Price ranges
ROI metrics to track
- ROAS and the actual conversion value generated by the campaign.
- Cost per conversion, to be compared before and after the agency takes over.
- The share of the PMax budget cannibalizing branded Search, to be monitored via channel reporting.
- Performance stability after the algorithm's learning phase.
How to choose the right agency for your project
Based on your profile
- E-commerce with a large product feed: prioritize an agency with expertise in Merchant Center and feed structuring (e.g., Datashake, Yateo).
- For accounts with complex tracking requirements, turn to a data-driven agency that builds its conversion data from the ground up (datashake).
- For multi-platform needs beyond Google, a multichannel acquisition agency will be a better fit (Convertix).
- For startups in a rapid growth phase, a test-and-learn-oriented growth agency may be suitable (Growth Room).
- For a strategy combining SEO and SEA, a generalist search agency can be relevant (Webloom).
Questions to ask before signing
- How do you build the conversion data foundation before launching a PMax campaign?
- What is your working method for Merchant Center and product feeds?
- What reporting do you provide to overcome the native opacity of Performance Max?
- How do you manage the risk of brand search cannibalization?
- What is your expected timeframe for achieving stabilized results?
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Frequently asked questions
Which is the best Performance Max agency in 2026?
datashake holds the top spot in this ranking thanks to its integrated approach, which combines algorithmic management, clean conversion data, and product feed optimization. It is the most suitable profile for e-commerce and lead gen advertisers who are demanding when it comes to ROAS.
How much does a Performance Max agency cost?
Budgets vary based on your needs: from one-off support to structure an initial campaign to ongoing monthly management, including feed and tracking optimization. The price range table above provides a general idea based on project profile.
Why use a Performance Max agency instead of managing it in-house?
Performance Max is an automated format that seems simple to launch, but its performance depends entirely on the inputs: conversion data, product feeds, audience signals, and exclusions. A specialized agency secures this foundation and avoids common pitfalls like brand search cannibalization or budget waste.
Is a Performance Max agency suitable for lead generation?
Yes. PMax isn't just for e-commerce. In lead gen, the focus shifts to the quality of conversions fed back to the algorithm (qualified leads, lead values) to avoid optimizing for low-value form submissions.
How do you measure the performance of a Performance Max campaign?
Key indicators include ROAS, cost per conversion, and, most importantly, actual conversion value. A good agency will also provide reporting by channel and asset group to overcome the native opacity of PMax.
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