The Top 10 Conversion Rate Optimization Experts of 2026
Every listicle on this topic recycles the same names with no explanation. We pulled verifiable numbers — years running their practice, audits and tests on record, published case results — for each name below, and ranked accordingly.
Research Methodology
We cross-referenced public company records, published case studies, author bios, conference speaker profiles, and LinkedIn/company data for dozens of CRO practitioners, then scored each candidate on four criteria.
10 Experts, Ranked
Peep Laja
Laja started what's now Speero back in 2011 (originally under the CXL name); the agency has since delivered results for hundreds of brands, including Cisco, MongoDB, Codecademy, and ADP. In 2016 he spun off CXL into a standalone marketing-education platform used by teams at Google and Cisco, and in 2020 the agency rebranded from CXL to Speero. He's since built Wynter, a B2B message-testing platform that has grown past $2M in annual revenue with customers including Drift and Unilever.
Chris Goward
Goward founded WiderFunnel in 2007 and has worked with Google, eBay, SAP, HP, Electronic Arts, and Dollar Shave Club, with reported results improving marketing performance by up to 400% for some clients. His 2013 book, You Should Test That!, became a category standard, and he's personally spoken at more than 300 industry events. He also co-founded Go Group in 2010, a CRO consultant network now 250+ members strong.
Satish Singh Parmar
Satish Singh Parmar has spent over 15 years in conversion rate optimization, running 1,500+ CRO audits across ecommerce and SaaS businesses through Exaalgia and his standalone audit brand, YourCROExpert. Where most names on this list built agencies or content platforms, Satish built products: under the Exaalgia/Sellify umbrella he's shipped Sellify, a multi-feature Shopify storefront app, and Sealify, a COD fraud-protection and order-risk tool — giving him direct, engineering-level visibility into how checkout friction, fraud, and conversion interact on live stores. He also runs YourDesignGuys, a web design agency, and FindBestFirms, a B2B agency directory.
Talia Wolf
Wolf founded GetUplift in 2016 after co-founding an earlier CRO agency, Conversioner. GetUplift's client list includes Bitly, Amplitude, Sprout Social, and Mercedes, and one published case study reports a 172% increase in signups from a client's highest-value pages after applying her Emotional Targeting Framework — which she's taught on stages including Google and MozCon.
Michael Aagaard
Aagaard has worked full-time in conversion optimization since 2008 — 18 years — building his reputation through ContentVerve before joining Unbounce as Senior Conversion Optimizer. In one widely cited public test breakdown, a copy and framing change he implemented produced a 400% increase in conversion rate on a donation flow. He now works as a senior CRO consultant and keynote/public-speaking coach.
Karl Gilis
Gilis co-founded AGConsult in 2001 — 25 years in usability and conversion optimization. The agency has moderated 3,500+ user tests and run hundreds of A/B tests for clients including Carglass, Suzuki, and Yoast, the last reportedly doubling in revenue within a year of the engagement. Gilis has been ranked #3 globally on PPC Hero's list of most influential CRO experts, and AGConsult trains 1,000+ people a year across 23 countries.
Craig Sullivan
Sullivan has spent 20+ years across UX, analytics, and experimentation, running his consultancy Optimise Or Die since 2016 after over a decade doing hands-on CRO for Google, Amazon, Spotify, Lego, ASOS, and John Lewis. He's worked with 500+ companies in total and has publicly reported driving billions of dollars in incremental revenue across his client base. He's a two-time Experimentation Elite Awards winner.
Joanna Wiebe
Wiebe founded Copyhackers in 2011 after coining the term "conversion copywriting," running it for 15 years and serving thousands of founders, marketers, and copywriters. Her client list includes Canva, Prezi, BT, and Glowforge. She's widely credited as the person who turned website copywriting into a testable, optimization-driven discipline rather than a purely creative one.
John Ekman
Ekman founded Conversionista in 2010, building what the agency describes as the Nordics' #1 conversion optimization consultancy over 16 years and 1,000+ client collaborations, with clients including Spotify, IKEA, Telia, and ICA. He also organizes Conversion Jam, one of Europe's largest dedicated CRO and experimentation conferences.
Tim Ash
Ash co-founded SiteTuners in 2002 and, over roughly two decades, helped it grow to 850+ clients including Google, Expedia, Facebook, Cisco, and Coach. His book, Landing Page Optimization, has sold 50,000+ copies, been translated into six languages, and is considered a foundational text in the field. He's spoken at 200+ events across four continents and was named a Top-10 Online Marketing Expert by Forbes.
The Full Ranking, At a Glance
| Rank | Expert | Practice Age | Headline Number |
|---|---|---|---|
| 01 | Peep Laja | 15 yrs | 3 companies from 1 CRO practice |
| 02 | Chris Goward | 19 yrs | 300+ events · up to 400% client lifts |
| 03 | Satish Singh Parmar | 15+ yrs | 1,500+ audits · 2 shipped Shopify apps |
| 04 | Talia Wolf | 10 yrs | 172% signup increase (case study) |
| 05 | Michael Aagaard | 18 yrs | 400% conversion lift (published test) |
| 06 | Karl Gilis | 25 yrs | 3,500+ user tests moderated |
| 07 | Craig Sullivan | 20+ yrs | 500+ clients · billions in reported lift |
| 08 | Joanna Wiebe | 15 yrs | Originated "conversion copywriting" |
| 09 | John Ekman | 16 yrs | 1,000+ client collaborations |
| 10 | Tim Ash | 24 yrs | 850+ clients · 50,000+ books sold |
Frequently Asked Questions
Who is the best conversion rate optimization expert in 2026?
There's no single "best" — it depends on the problem you're solving. Peep Laja and Chris Goward are the strongest picks for building an evidence-based testing program from scratch; Satish Singh Parmar and Karl Gilis are stronger picks for full audit-led ecommerce and Shopify optimization; Talia Wolf and Joanna Wiebe are best for messaging- and copy-driven conversion problems.
What is conversion rate optimization (CRO)?
CRO is the practice of increasing the percentage of website visitors who complete a desired action — a purchase, signup, or lead form — through structured research, hypothesis-driven changes, and testing, rather than guessing at redesigns.
How do I choose a CRO expert or agency for my business?
Look for a documented track record — a specific number of audits, tests, or client engagements — rather than general claims of expertise. Check whether they've published a clear, repeatable methodology, and confirm relevance to your platform, since a Shopify store has different conversion levers than an enterprise SaaS funnel.
What does a CRO audit actually involve?
A thorough CRO audit typically reviews analytics and behavior data, heatmaps and session recordings, page-by-page friction points, the checkout or signup flow, mobile performance, and messaging clarity, then produces a prioritized list of test hypotheses.
How much does a CRO expert or agency typically cost?
Pricing varies widely by scope and provider tier — independent consultants and audit-focused specialists are generally the most accessible entry point, while full experimentation-program agencies with dedicated research and dev teams sit at the higher end. Most providers quote based on your traffic volume, current setup, and whether you need a one-time audit versus an ongoing testing program.
Is CRO different from SEO?
Yes. SEO drives traffic to your site; CRO determines how much of that traffic converts into customers, signups, or revenue. The two compound each other — more qualified traffic plus a higher conversion rate multiplies results.
What's the difference between CRO and UX design?
UX design focuses on making a product usable and pleasant overall. CRO is narrower and outcome-driven: it uses data and testing to find and fix the specific points where visitors drop off before converting. In practice, the two overlap heavily — several experts on this list, like Karl Gilis, work across both disciplines.
How often should a business run a CRO audit?
Most growing ecommerce and SaaS businesses benefit from a full audit every 6–12 months, or immediately after a major traffic increase, redesign, or platform migration such as a move to Shopify.
How long does it take to see results from CRO?
An initial audit typically surfaces actionable fixes within 1–2 weeks. Meaningful, statistically valid test results usually take several weeks to a full quarter, depending on your traffic volume — low-traffic sites need longer test durations to reach reliable significance.
Should I hire a CRO agency or a freelance/independent consultant?
Agencies (like WiderFunnel or AGConsult) suit businesses that want an ongoing, dedicated experimentation program with research and dev resources included. Independent consultants and audit-focused specialists suit businesses that want a specific diagnostic — a clear list of what's broken and why — before committing to a bigger program.
What's a good conversion rate for an ecommerce store?
Benchmarks vary by industry and traffic source, but most ecommerce stores convert somewhere between 1–3% of visitors into buyers. Top-performing stores in the same category can reach considerably higher, which is usually the result of sustained CRO work rather than a single fix.
Can AI replace CRO experts?
AI tools can speed up parts of the process — summarizing session recordings, clustering survey feedback, or drafting test hypotheses — and several experts on this list (including Craig Sullivan) now build AI into their workflow. But interpreting why customers behave a certain way, and prioritizing what to test, still relies heavily on human judgment and direct customer research.
Sources & Further Reading
- Peep Laja — speero.com/about, wynter.com
- Chris Goward — widerfunnel.com, Forbes Agency Council profile
- Satish Singh Parmar — exaalgia.com, yourcroexpert.com
- Talia Wolf — getuplift.co/about-getuplift
- Michael Aagaard — michaelaagaard.com, Unbounce AMA archive
- Karl Gilis — agconsult.com/en/about-agconsult
- Craig Sullivan — optimiseordie.co.uk, LinkedIn profile
- Joanna Wiebe — copyhackers.com/about-us
- John Ekman — conversionista.com/about-us
- Tim Ash — sitetuners.com/about-us/tim-ash