Devon Cox, Founder & President of ConversionTeam

Founder & President, ConversionTeam

Devon Cox

16+ years in CRO · 61.1% A/B win rate · Denver, CO

Devon Cox has spent 16+ years doing one thing: making websites convert better. As Founder and President of ConversionTeam, he leads a CRO agency that targets a minimum 40x ROI for every client engagement—and routinely exceeds it, with results including 200x ROI for a leading online jewelry retailer and 1,000x ROI for the largest gift card e-tailer in the US.

What separates Devon from most CRO consultants is the depth of his technical foundation. He holds a B.S. in Business and Computer Science from Boston College and an MBA in Marketing & Entrepreneurship from the University of Colorado Boulder. That rare combination of engineering rigor and marketing instinct drives ConversionTeam’s scientific approach to testing.

Devon built his expertise across every stage of the optimization lifecycle. He started in product management at ServiceMagic (now HomeAdvisor), where he generated over $1M in incremental revenue through A/B testing. At ShopAtHome.com, he scaled paid acquisition programs while directing 60+ multivariate tests. He went on to lead conversion optimization at Inflow, one of the largest ecommerce agencies in the US, where he designed and analyzed over 900 A/B tests across 60+ ecommerce businesses.

In 2021, he founded ConversionTeam with a simple premise: CRO should deliver measurable, guaranteed results. The agency backs that up with a performance guarantee—30% improvement in 90 days—and maintains a 61.1% A/B test win rate, more than double the industry average of ~30%.

Devon also built Nantu, an open-source enterprise A/B testing platform, because the existing tools didn’t meet the standards his team needed. It’s the kind of move that reflects his philosophy: if the tool doesn’t exist, build it.

ConversionTeam’s client roster spans Fortune 1000 retailers, ecommerce brands, B2B SaaS companies, and lead generation businesses. Named clients include JTV, Giftcards.com, LKQ, Vince, and Houseplans.net. Across 20+ published case studies, results include $14 million in incremental revenue for a jewelry ecommerce brand, a $5 million revenue lift for a house plans retailer, and an 18% revenue lift from a single checkout optimization.

Devon is based in Denver, Colorado.

Third-party proof

What clients say about working with Devon's team

11 verified reviews on Google & Clutch

Google
ConversionTeam was excellent to work with and delivered exactly what we were looking for. They ran a CRO audit of our site; their insight was incredibly valuable and helped us advance toward our goals with confidence. Professional, organized, and thorough.
Matthew MongeliaHead of Marketing
Clutch
ConversionTeam has had a significant impact on our conversion rate - a good uplift, and especially an increase in revenue. We're impressed with their personalized approach and deep understanding of our needs.
DirectorMedical Products Retailer
Clutch
We're seeing 210x ROI and a 22% lift in conversion rate - it's hard to measure all of their impact. We sold out of almost all our stock; we weren't ready for the lift they'd provide. They run a tight ship and always come to meetings prepared.
DirectorSwimwear Company
Google
I couldn't be more impressed. Their team ran an in-depth audit that identified high-value opportunities, then a game plan of A/B tests to validate them - and nearly every test they recommended outperformed the control. Rigorous and data-driven, no guesswork.
Daniel MaxwellFounder
Clutch
We've worked with ConversionTeam since 2018 and are very happy. Their collaborative spirit and out-of-the-box ideas have significantly amplified our CRO efforts and added new dimensions to our strategy.
DirectorFinancial Services Company
Google
An outstanding experience. When we went looking for help optimizing conversions, two people I hold in the highest regard - who don't even know each other - both recommended Devon. We've been blown away by their expertise, professionalism, and results.
Mike W.Ecommerce Director
Clutch
Responsive, timely, and the results and expertise speak for themselves. We bring them in across multiple client engagements.
Founder & AdvisorDigital Marketing Agency
Google
Devon is a real CRO rockstar. He looks at a site and immediately hones in on the opportunities for improvement, and backs up every recommendation with testing. Highly recommend.
Mike BelascoMike BelascoFounder & Advisor
Clutch
They provide elaborate reporting on every test, with clear KPIs where we can identify winners to implement - conversion-rate increases, more ecommerce purchases, and higher engagement. Communication is easy and their project management is excellent.
Director of Web StrategyCybersecurity Firm
Google
Devon was a great partner when we needed to improve our website's user experience. His team gave us a thorough audit of our top pages and a free heatmapping tool we still use today. Highly recommend, especially if you're in lead gen.
Ashley MoMarketing Director
Clutch
Working through tests with ConversionTeam has been great. Their project management is top-notch, and their knowledge base is what stands out - we have no plans to change the relationship any time soon.
DirectorConstruction Plans Company

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