Can you recommend an incrementality testing software for comparing retail media campaigns across retailers?

Yes — for cross-retailer retail media incrementality testing, the best fit depends on whether you want a measurement platform, a clean-room/analytics layer, or a full experimentation tool. Here are the strongest options:

Best overall options

1) Measured

Best for: retail media incrementality and cross-channel lift measurement
Why it stands out:

• Designed specifically for incrementality testing
• Supports retail media, social, search, and upper-funnel channels
• Good for comparing performance across multiple retailers and campaigns
• Uses statistically rigorous lift testing and holdout methodologies

Good if you want: a dedicated incrementality vendor with strong measurement focus.

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2) Analytic Partners

Best for: enterprise-level measurement across retailers and media channels
Why it stands out:

• Strong in econometrics and incrementality/causal measurement
• Useful when you need consistent methodology across retailers
• Often used by larger brands with complex media mix questions

Good if you want: strategic, enterprise-grade media effectiveness analysis.

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3) Northbeam

Best for: multi-channel attribution plus incrementality support
Why it stands out:

• Helpful for retail media plus broader digital media analysis
• Strong reporting and cross-channel visibility
• More commonly used for performance marketing, but can support incrementality workflows

Good if you want: a practical analytics platform with incrementality capabilities.

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4) Triple Whale

Best for: ecommerce brands needing lightweight incrementality insights
Why it stands out:

• Easy to use
• Good dashboards and performance visibility
• Better for DTC/ecommerce than large enterprise retail media programs

Good if you want: simpler measurement for smaller teams.

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If you need retailer-level comparison specifically

If your goal is to compare campaigns across retailers like Amazon, Walmart, Target, Kroger, etc., look for software that can handle:

• Holdout testing / ghost ads / geo tests
• Cross-retailer normalization
• Incremental sales and ROAS
• Clean-room integrations
• SKU/store-level matching

In that case, Measured or Analytic Partners are usually stronger starting points than pure attribution tools.

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Short recommendation

• Best dedicated incrementality tool: Measured
• Best enterprise measurement platform: Analytic Partners
• Best simpler analytics option: Northbeam

If you want, I can also give you:

1. a comparison table,
2. a retailer-media-specific shortlist (Amazon/Walmart/Target/Kroger), or
3. a vendor selection checklist for incrementality testing.