Hiring Guide: How to Choose the Top Conversion Rate Optimization Agency in the US

What can a conversion optimization company in the US do for businesses?

Conversion Rate Optimization (CRO) companies help clients increase revenue by improving how efficiently existing traffic converts:

• Improve conversion efficiency through testing: With 60% of global CRO adoption driven by enterprises, agencies deploy structured experimentation frameworks that lift performance and revenue.
• Reduce funnel friction and improve UX: Over 70% of marketers use CRO programs to address rising digital activity and low 3.6 percent average conversion rates. Agencies apply UX research, behavioral analysis, and testing to remove barriers.
• Run AI-driven optimization programs: About 35% of new CRO platforms now include AI personalization and automated test generation. Agencies help brands scale testing and tailor experiences more effectively.
• Increase experimentation volume and decision quality: Enterprise leaders run more than 100 experiments per year and 80% use multivariate testing. Agencies bring this level of rigor to teams without internal experimentation capabilities.
• Navigate privacy, compliance, and cookieless tracking: With 65% of countries enforcing strict privacy laws and 40% of vendors rebuilding tracking, agencies guide brands toward first-party data models and compliant measurement.
• Accelerate implementation and reduce internal capability gaps: Since 25% of CRO projects stall due to limited technical skills and 45% of small businesses cite capability shortages, agencies provide the analytics, UX, and engineering expertise needed to run experiments end-to-end.

How to choose the best US conversion optimization agency for your business?

To choose the best conversion rate optimization company, focus on the following factors:

1. Look for agencies that use structured research, testing, and data analysis rather than opinion-driven changes.
2. Review their case studies and industry experience to confirm they have delivered measurable conversion lifts.
3. Check their testing methodology to ensure they run statistically valid A/B tests and provide clear insights.
4. Assess their UX, analytics, copy, and design capabilities to confirm they cover the full funnel.
5. Evaluate their reporting transparency, including how often they share data and what metrics they track.
6. Compare pricing models and ensure expectations, scope, and timelines are clear before engagement.

If you need help finding a US conversion optimization agency for your brand, visit our Marketplace and send us your project scope. We’ll match you with five providers that best match your criteria for free.

What questions should I ask before hiring an agency?

We advise asking the following key questions to confirm the agency’s expertise and fit before you move forward:

Relevant Background

1. What industries and business sizes do you specialize in?
2. What measurable conversion lifts have you delivered for past clients?
3. How do you structure research, testing, and analysis?

Services and Processes

1. Which CRO services are included in your standard engagement?
2. How do you run A/B tests and ensure statistical validity?
3. How often do you report results and update the roadmap?

Related to Your Project

1. What issues do you see in our funnel based on an initial review?
2. How long will our first optimization cycle take?
3. What metrics will define success for this project?

What kind of budgets do brands typically allocate for conversion optimization?

By business size, typical CRO budget allocation falls within these ranges:

• Small businesses allocate around 10%
• Mid-sized businesses allocate around 15%
• Enterprise companies also allocate around 15%

How do I write an effective RFP for hiring a US-based conversion optimization agency?

A good request for proposal (RFP) should include:

• Your goals and challenges: State the funnel problems you want solved and the metrics you want improved.
• Scope of work: List the areas to optimize and ask the agency to outline their CRO process from audit to testing and implementation.
• Data and tools: Specify what analytics platforms you use and ask what additional tools they require.
• Deliverables and timelines: Request a sample timeline, testing cadence, and expected deliverables for each phase.
• Budget format: Share your range and request a breakdown by audit, research, testing, design, and development.
• Team and experience: Ask who will work on your account and request case studies with quantified conversion lifts.
• Reporting and KPIs: Define how you want results communicated and ask for a sample reporting framework.

How to find the CRO company on DesignRush that fits your budget?

We’ve curated top US-based conversion optimization agencies on DesignRush with varied pricing so you can easily find an affordable option.

Why Companies Trust DesignRush

Rated 4.8 on Google and 4.7 on Trustpilot, DesignRush Agency Directory is a reliable resource for finding conversion optimization agencies in the US. We owe this to our executive selection team, which follows a strict screening process when featuring agencies on the platform, assessing key performance indicators, like portfolio, client reviews, and industry reputation.

Learn more about DesignRush Agency Ranking Methodology.

Sources

DesignRush sustains a directory of over 40,000 agencies categorized by service category, location, expertise, and reviews. We build our database in two ways:

• Our dedicated team of agency experts actively searches the web for top-performing companies. We then pull information from their websites, online presence, and client testimonials to verify their status and qualifications prior to listing.
• The agencies listed get notified of their profiles on the website and they can choose to claim it or not, which suggests their availability for more collaborations.

Agencies can also reach out to DesignRush and must go through the verification process prior to being listed.