Best conversion consultants in the United States
In this guide
Conversion consulting is useful when a site has meaningful traffic but loses too many people between interest and action. The strongest practitioners diagnose that problem through customer research, analytics, messaging, UX, and controlled experiments rather than jumping straight to a redesign. Some advise alone; others lead small specialist teams.
This list covers broad-funnel conversion work for US buyers and excludes sales-closing consultants and paid-media firms that do not own the on-site experience.
Comparison table
Scroll to compare all columns. Select a provider name to read its profile.
| Provider | Type | Best for | Location | Known engagement details |
|---|---|---|---|---|
| Peep Laja (Speero, CXL, Wynter) | Expert-led boutique | Research-led experimentation programs | Austin, Texas; works nationally | Full-service programs and focused projects by inquiry |
| David Spiegel | Independent consultant | Product-side CRO, UX, and implementation judgment | San Francisco; works nationally | Consulting scope and availability discussed directly |
| Talia Wolf (GetUplift) | Expert-led boutique | Emotional targeting and SaaS funnels | Serves US clients remotely | Audits, managed optimization, and team training |
| Joanna Wiebe (Copyhackers) | Expert-led boutique | Conversion copy and message testing | Serves US clients remotely | Workshops and consulting by inquiry |
| Khalid Saleh (Invesp) | Expert-led boutique | Managed CRO for ecommerce and lead generation | Chicago; works nationally | Audits, testing programs, software, and training |
| Bryan Eisenberg | Independent consultant | Persuasion architecture and journey diagnosis | Round Rock, Texas; works nationally | Consulting, training, and mentoring for selected clients |
| Craig Sullivan (Optimise Or Die) | Independent consultant | Experiment audits and team coaching | United Kingdom; serves US clients remotely | Audits, benchmarking, coaching, and office hours |
| Brian Massey (Conversion Sciences) | Expert-led boutique | Behavioral-science testing | Austin, Texas; works nationally | Audits, managed CRO, redesign work, and training |
| Tim Ash | Independent consultant | Enterprise landing pages and digital-growth advice | San Diego; works nationally | Consulting, executive advisory, and training |
| Karl Gilis (AGConsult) | Expert-led boutique | Usability research and testing | Belgium; serves US clients remotely | User-research, UX, and testing engagements by inquiry |
| Rishi Rawat (Frictionless Commerce) | Expert-led boutique | Shopify product pages and first-time buyers | Michigan; works nationally | Product-page and broader funnel work by inquiry |
| Sean Ellis | Independent consultant | Conversion inside a wider growth system | Newport Beach, California; works nationally | Workshops, courses, and one-to-one sessions |
| Hiten Shah | Independent consultant | Founder-level behavioral and product insight | San Francisco; works nationally | Advisory terms are not published |
The consultants
1. Peep Laja
Peep Laja founded CXL, Wynter, and Speero, the last of which runs experimentation, customer-research, UX-audit, and analytics programs. He is a strong fit for a company with enough traffic and internal capacity to act on a steady testing program, rather than a team looking for a quick page critique.
2. David Spiegel
David Spiegel is a San Francisco technical product manager, builder, and independent consultant. He describes occasional consulting work across CRO, onboarding, and monetization, while his professional profile shows the broader product background behind that work. He makes the most sense when the conversion question crosses UX, product decisions, and implementation.
3. Talia Wolf
Talia Wolf leads GetUplift, a conversion practice built around customer research and her Emotional Targeting Framework. The firm’s audits, managed programs, and training are particularly relevant when a funnel’s real problem is message-market fit rather than page mechanics.
4. Joanna Wiebe
Joanna Wiebe founded Copyhackers and built her practice around conversion copywriting. Her consulting and workshop offer suits teams that already suspect the bottleneck is in the value proposition, pricing-page language, signup copy, or lifecycle messaging.
5. Khalid Saleh
Khalid Saleh co-founded Invesp, a Chicago firm focused on conversion optimization since 2006. Invesp combines audits, research, ongoing testing, and training, which is a better match for a sustained program than a founder seeking a single outside opinion.
6. Bryan Eisenberg
Bryan Eisenberg’s Buyer Legends practice applies Persuasion Architecture to the customer journey. His consulting is well suited to teams that need to understand why a journey fails to persuade before they invest in more traffic or another visual redesign.
7. Craig Sullivan
Craig Sullivan works through Optimise Or Die, combining analytics, UX research, experiment review, and coaching. He is especially useful when a team already runs tests but needs better prioritization, cleaner measurement, and stronger internal testing habits.
8. Brian Massey
Brian Massey founded Conversion Sciences, an Austin firm offering audits, managed optimization, landing-page work, and training. The practice is a practical choice for ecommerce or lead-generation teams that want testing and implementation from the same small specialist firm.
9. Tim Ash
Tim Ash wrote Landing Page Optimization and now offers consulting, executive advisory, and training. His background fits senior teams that need to connect page-level conversion decisions with a broader digital-growth program.
10. Karl Gilis
Karl Gilis co-founded AGConsult, a Belgium-based usability and conversion firm that grounds its work in moderated user research and testing. US teams should choose him when observing real users matters more than maximizing the number of experiments shipped each month.
11. Rishi Rawat
Rishi Rawat runs Frictionless Commerce and concentrates on persuading first-time ecommerce buyers, especially on Shopify product pages. His narrow product-page focus is a virtue for brands with a clear leak there; it is less suited to a company seeking a large, multi-surface testing department.
12. Sean Ellis
Sean Ellis offers growth workshops, courses, and one-to-one sessions informed by early growth roles at Dropbox, LogMeIn, and Eventbrite. He is best considered when on-site conversion is tangled up with activation, positioning, or the overall growth model.
13. Hiten Shah
Hiten Shah co-founded Crazy Egg and KISSmetrics, giving him a long view of behavioral analytics and the questions behind conversion data. His current work is broader founder research and advice, so he fits a strategic conversation better than an outsourced experiment calendar.
Buyer guide
Start by deciding whether you need diagnosis, delivery, or both. A strategist can identify the constraint and give your team a test plan; a boutique with researchers, designers, and analysts can keep that plan moving after the first audit.
Ask each candidate what research happens before ideation, who writes and builds variants, how test validity is judged at your traffic level, and what happens when a test loses. Request a complete example that includes the baseline, sample size, test duration, and what changed afterward. A persuasive percentage without that context is marketing, not a forecast.
Low-traffic companies should not force an A/B-testing program that cannot reach useful sample sizes. Customer interviews, usability sessions, message tests, and sequential releases may produce better decisions until traffic grows.
Related specialties
Landing-page CRO agencies are a better fit when paid-acquisition pages are the main surface and you need design plus production. Checkout optimization consultants focus on cart, payment, and purchase completion. Signup-flow specialists work on registration friction, while monetization consultants handle pricing and packaging.
FAQs
What does a conversion consultant usually do first?
Most begin with analytics, customer research, usability review, and a funnel audit. The useful output is a prioritized set of problems and testable hypotheses, not a list of generic best practices.
Should I hire a solo consultant or a boutique firm?
A solo consultant is often enough for diagnosis, coaching, or a high-stakes message problem. A boutique is usually easier when you need research, design, copy, development, and analysis delivered continuously.
How much traffic is enough for CRO testing?
There is no honest universal threshold. It depends on the baseline conversion rate, expected effect, allocation, and how long you can run a test without major traffic changes. Ask the consultant to calculate this from your own numbers before agreeing to a testing cadence.
Are reported conversion lifts transferable to my site?
No. A case result can show how a provider thinks, but your audience, offer, baseline, and implementation determine what happens next.
What should be defined in the proposal?
Make ownership explicit for research, copy, design, development, instrumentation, analysis, and documentation. The proposal should also say how priorities change when the first hypothesis is wrong.