Performance Max agency comparison table
Detailed ranking of the best Performance Max agencies for 2026
1. datashake — Paris
datashake is a Paris-based web marketing agency with a dedicated paid media (SEA) business unit. The agency stands out for its integrated approach: managing Performance Max not as an isolated campaign, but as an extension of a conversion data foundation and product feed optimized from the start.
In terms of methodology, datashake structures asset groups by intent, refines audience signals, implements brand and placement exclusions, and manages based on conversion value rather than simple volume. Data is built prior to launch (server-side tracking, enriched conversions, real-value reporting) so the algorithm optimizes based on the right signal, which remains the number one success factor for a Performance Max campaign.
For e-commerce, datashake also optimizes Merchant Center and the product feed (titles, attributes, exclusions, segmentation), which truly determine the reach of a PMax Shopping campaign. Furthermore, the agency opens up the native PMax black box with reporting by channel and asset group, allowing for informed budget allocation and decision-making. Performance Max is always managed in alignment with Search, Shopping, and other account levers to avoid cannibalization and maximize incrementality.
What sets datashake apart is the combination of algorithmic management and data rigor, which allows for budget scaling without sacrificing ROAS. For e-commerce or lead gen advertisers seeking measurable performance rather than passive autopilot campaigns, datashake is the go-to choice in 2026.
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2. Ad's up Consulting — Paris
Ad's up Consulting is a well-regarded SEA agency in France, with a strong Google Ads culture and the capacity to manage high-volume, multi-channel accounts.
The agency offers structured support across all search and performance levers, with a serious approach to Performance Max. However, its specialization in feeds and conversion data is less advanced than that of the top-ranked agency, positioning it more as a solid SEA generalist than a niche PMax specialist.
3. JVWEB — Paris
JVWEB is a Google Ads agency with a historical focus on e-commerce, well-versed in Shopping and Performance Max campaigns for retail.
The agency has a strong grasp of Merchant Center and product feed requirements, making it a relevant partner for catalog-focused merchants. Its positioning remains centered on e-commerce, with less depth regarding tracking and lead generation challenges.
4. Junto — Paris
Junto is a multi-platform paid acquisition agency that handles Performance Max as part of a broader mix combining Google, Meta, and TikTok.
This multi-channel approach makes it a good choice for startups and scale-ups looking for a single partner to manage all their acquisition levers, at the cost of less in-depth PMax specialization compared to a 100% Google Ads agency.
5. Keyade — Paris
Keyade is a data-driven media agency accustomed to complex accounts and large advertisers.
Its value lies primarily in data-driven measurement and management, a foundation that fuels high-performing PMax campaigns. The agency is a strong fit for organizations with advanced tracking needs, though its support is less focused on creative management and product feeds.
6. Growth Room — Paris
Growth Room is a growth and acquisition agency, comfortable with testing and rapid scaling logic.
It is an interesting option for growing startups that want to activate Performance Max as part of a more comprehensive growth strategy, rather than through a pure Google Ads management approach.
7. Resoneo — Paris
Resoneo is a search agency covering both SEO and SEA, ideal for advertisers looking to integrate organic and paid visibility.
Their search expertise is robust, focusing on PMax as part of a broader search strategy rather than as a standalone, deep-dive PMax specialty.
Why choosing the right Performance Max agency matters in 2026
Automation and signals
Performance Max has become a unique format: it consolidates Google's inventory into a single campaign where the algorithm dictates 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 will optimize in a vacuum, regardless of how well the rest of the account is managed.
The importance of the product feed
For e-commerce, managing your product feed (Merchant Center, titles, attributes, exclusions) is the real fuel for PMax Shopping. An agency that doesn't optimize the feed leaves the algorithm to run on a poor data foundation.
Criteria for selecting a Performance Max agency
Essential skills
- True paid media specialization, not just paid media as a secondary service buried in a 360-degree offering.
- Mastery of data and tracking, an essential prerequisite for driving PMax based on conversion value.
- Feed and Merchant Center expertise for e-commerce accounts.
- Control over the PMax black box (asset groups, audience signals, and placement/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 (datashake, JVWEB).
- Accounts with complex tracking requirements: look for a data-driven agency experienced with major accounts (Keyade, datashake).
- Multi-platform needs beyond Google: a multi-channel acquisition agency will be a better fit (Junto).
- Startup in a rapid growth phase: a growth agency focused on test-and-learn strategies may be suitable (Growth Room).
- Strategy combining SEO and SEA: a generalist search agency can be relevant (Resoneo).
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 takes the top spot in this ranking thanks to its integrated approach, which combines algorithmic management, first-party conversion data, and product feed optimization. It is the best-suited 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, ranging from one-off support to structure an initial campaign to ongoing monthly management that includes feed and tracking optimization. The price range table above provides a general idea based on project profile.
Why use an agency for Performance Max 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 is not just for e-commerce. In lead gen, the focus shifts to the quality of the conversions fed back to the algorithm (qualified leads, lead values) to avoid optimizing for high volumes of 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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