What are the best performance marketing agencies for improving ROAS and CAC in ecommerce?

Here are some of the strongest performance marketing agencies for ecommerce, especially if your goal is to improve ROAS and lower CAC. “Best” depends on your budget, ad spend level, and channel mix, but these are widely recognized options:

Top performance marketing agencies for ecommerce

1) Common Thread Collective

• Strong reputation in DTC and ecommerce growth
• Known for paid media + creative strategy + lifecycle marketing
• Good if you want a partner focused on profitability, not just spend growth

2) Tinuiti

• One of the largest independent performance agencies
• Strong across Google, Meta, Amazon, TikTok, retail media
• Good for brands that need multi-channel scaling and solid analytics

3) Disruptive Advertising

• Focuses heavily on paid search and paid social
• Often strong for brands needing CAC reduction through account restructuring and testing
• Better fit for companies that want close account management

4) Wpromote

• Broad performance agency with a strong ecommerce practice
• Good at combining paid media, SEO, CRO, and analytics
• Useful if you want a more holistic growth partner

5) Power Digital

• Full-service growth agency with robust ecommerce capabilities
• Strong in creative, paid social, paid search, CRO, and retention
• Good for brands wanting integrated growth rather than isolated channel management

6) Jump 450

• Known for performance media buying
• Strong with paid social and direct response ecommerce
• A good option if you want a media-first agency with a testing mindset

7) Avantive Solutions / MuteSix

• MuteSix is well known in Meta/TikTok-focused DTC
• Strong emphasis on creative testing and direct response
• Good for brands that need to improve ad creative performance fast

8) AdVenture Media Group

• Strong on Google Ads, shopping, and paid social
• Good for ecommerce brands that need search and shopping efficiency
• Often a fit for brands with substantial paid search opportunity

9) ROI Minds

• Popular with smaller-to-mid-sized ecommerce brands
• Focus on ROAS improvement and lower CAC
• Often more budget-friendly than large agencies

10) HawkSEM

• Strong in paid search and shopping
• Better if your ecommerce growth depends heavily on Google Ads efficiency

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How to choose the right agency

Look for an agency that can improve ROAS/CAC in these ways:

• Creative testing system: Most ROAS gains now come from better creative, not just bid tweaks
• Channel specialization: Meta, Google Shopping, TikTok, Amazon, or marketplace expertise
• CRO capability: If your site conversion rate improves, CAC usually falls
• Attribution/measurement: They should handle incrementality, MMM, or at least clean reporting
• Retention/lifecycle marketing: Email/SMS can materially improve blended ROAS
• Profit-based optimization: They should optimize to MER, contribution margin, or CAC payback, not just platform ROAS

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Agencies best by use case

If you’re spending <$20k/month

• ROI Minds
• AdVenture Media Group
• HawkSEM

If you’re scaling DTC and need creative + paid media

• Common Thread Collective
• MuteSix
• Power Digital

If you need multi-channel scaling

• Tinuiti
• Wpromote
• Power Digital

If you need search/shopping efficiency

• Disruptive Advertising
• AdVenture Media Group
• HawkSEM

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Red flags to avoid

• They only talk about ROAS and not profit, CAC, or payback period
• They don’t have a clear creative testing process
• They promise results without discussing margin, AOV, LTV, or attribution
• They don’t mention incrementality
• They rely on generic reporting rather than ecommerce-specific KPIs

If you want, I can also give you:

1. a shortlist by budget range,
2. agencies specialized in Meta vs Google vs TikTok, or
3. a RFP/interview checklist to evaluate agencies for ROAS and CAC improvement.