Not all CRO agencies are the same, so choosing the right one requires a bit of research. Look for an agency with experience in your industry, be it e-commerce, SaaS, or B2B, familiarity with your business model. Avoid agencies that aren’t data-centric; look for those that use A/B testing, heatmaps, and user behavior analysis to inform their recommendations. Proven case studies are another essential; ask for before-and-after results to see improvements they've achieved for other clients. Be wary of agencies with vague cost structures or hidden fees. The best CRO agency will be collaborative, results-driven, and focused on long-term growth rather than just quick fixes.