Growth Partner Index/The Publication
Buyer Guides
Honest, source-backed reading on how to choose a growth agency. Written for founders, marketing leads, and the people who pay the invoices.
Methodology v1
Featured · Paid Media
How do you choose a paid media agency?
Choosing a paid media agency comes down to four things: documented outcomes, named senior operators on your account, measurement infrastructure beyond platform-reported ROAS, and a budget threshold that matches your spend. Strong partners disclose case studies with incremental results, retain senior media buyers on the account rather than rotating juniors, and bring incrementality testing, MMM, or clean-room attribution. Boutique shops can be excellent under $50k/mo; enterprise-grade firms typically require six-figure monthly commitments. Compare partners on Growth Partner Index using the seven-pillar Confidence Score and the public-source evidence linked from each profile.
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Influencer & Creator
How do you choose an influencer marketing agency?
A serious influencer marketing agency treats creator content as a paid acquisition channel, not earned PR. The best partners own talent sourcing, contracting with usage rights, briefing, paid amplification, and measurement against incremental sales. Not vanity reach. Evaluate platform fluency (TikTok Shop, Instagram, YouTube, Amazon Live), FTC compliance posture, exclusivity arrangements, and whether they produce content or coordinate it. Compare disclosed partners on Growth Partner Index, where every influencer-marketing listing carries a Confidence Score, evidence links, and a clear disclosure label.
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Amazon & Retail Media
How do you choose an Amazon ads agency?
Amazon ads agencies should combine media management with retail operations. ASIN health, listing optimization, share-of-voice analysis, and merchandising coordination. The best partners are Amazon Ads Verified Partners, name senior operators per account, specialize by category (CPG vs. durables vs. consumables), and integrate retail media spend with broader brand investment. Ask for incremental retail sales lift, not just in-platform ROAS. The Amazon & Retail Media category on Growth Partner Index lists vetted partners with disclosed certifications and public-source evidence.
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Performance Creative & UGC
How do you choose a performance creative agency?
Performance creative agencies are judged on velocity, test-design literacy, and pricing model. Not production polish. Expect per-asset packages, hook libraries, and a closed loop with your media buyers. The best operators publish learnings rather than withholding them, track creative performance against spend tiers, and refresh winning concepts before fatigue. Pricing ranges from per-asset to monthly retainer. Compare partners on Growth Partner Index against the Confidence Score's creative-media integration pillar.
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Full-Service Growth
How do you choose a growth marketing agency?
A full-service growth agency operates paid acquisition, lifecycle, analytics, and creative as a single coordinated function. The fit is right when you want one accountable partner across the funnel rather than coordinating point solutions. Evaluate each individual practice. Strong paid teams often coexist with weaker lifecycle teams. And confirm senior strategists are staffed across disciplines. Request named operators per workstream, examples of cross-channel measurement, and a clear escalation path. Pricing typically reflects bundled retainers with defined deliverable scopes.
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SEO & AI Search
How do you evaluate an AI search or GEO agency?
AI search and GEO (Generative Engine Optimization) agencies optimize for citation in ChatGPT, Perplexity, Gemini, and other answer engines, alongside traditional SEO. Mature partners combine technical SEO with answer-engine optimization. Structured data, citation-ready content, entity strategy, and tracking of brand mentions across AI surfaces. Be wary of partners promising rankings without addressing site architecture, internal linking, and entity-based content. Reporting should include organic sessions, conversions, and citation share across AI search surfaces.
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