Storefront+
The client
eCommerce, apparel
The challenge
High cart abandonment on mobile despite strong traffic growth.
What we did
Checkout usability testing followed by a 12-test experiment program.
Improve your app conversion and revenue with an award‑winning CRO agency
Data-driven experimentation that turns more of your visitors into paying customers.
Find out how much revenue you're leaving on the table.
Trusted by Market Leaders
Northwind
CloudMetric
AppVenture
Finch&Co
Bluepeak
Storefront+
Loopcart
Vantage
Meadow
Pixelforge
Quantica
Hearthly
A recognized leader in Conversion Rate Optimization
and User Experience Optimization
TOPCRO Agency2025
BESTUX Optimization2024
TOPeCommerce Consultancy2024
TOPApp Optimization2025
BESTExperimentation Team2024
What clients say about the impact we drive
+64%
"Over two years the team grew our paid-traffic conversion rate by 64% while our ad spend stayed flat."
+40%
"They increased our trial-to-paid rate by 40% in six months of structured experimentation."
+43%
"Revenue per session went up 43%. Every test came with a clear rationale and a clean readout."
Limited slots each month
Book a CRO strategy session with our CEO
A free working session, not a sales call: walk through your funnel, spot the biggest leaks, and leave with three testable hypotheses.
Book a strategy sessionWatch our co-founder share actionable CRO tactics straight from the stage
How to build a CRO hypothesis backlog that actually wins
Checkout UX: the five patterns that quietly kill conversion
Apply to get an estimate of the conversion rate and revenue-per-user uplift we can drive for you
Apply for an estimateOur scientific CRO/UXO process
01
Data engineering across your customer journey and revenue modeling
Purpose
- Establish trustworthy tracking across every step of the funnel.
- Build a revenue model that connects micro-conversions to money.
- Define the KPIs each experiment will be judged against.
Methodology
- Analytics audit and tracking-plan implementation.
- Event taxonomy design and QA of the data layer.
- Baseline dashboards for funnel and cohort performance.
02
Conversion and UX research
Purpose
- Understand where and why visitors drop out.
- Ground every idea in observed user behavior, not opinions.
Methodology
- Funnel and segment analysis in your analytics stack.
- Session recordings, heatmaps and scroll maps.
- User surveys, polls and usability testing.
- Heuristic UX review against conversion best practices.
03
Data-driven hypothesis creation
Purpose
- Turn research findings into a prioritized backlog of testable ideas.
- Estimate the potential impact of each hypothesis before building it.
Methodology
- Hypothesis framing: problem, proposed change, expected effect.
- Prioritization by impact, confidence and effort.
- Backlog review with your team every sprint.
04
Design and copy solutions for each hypothesis
Purpose
- Translate hypotheses into concrete UX, UI and copywriting changes.
Methodology
- Wireframes and high-fidelity mockups for each variation.
- Conversion-focused copywriting.
- Design review against your brand guidelines.
05
A/B test development
Purpose
- Ship each variation without touching your production codebase.
Methodology
- Variation build in your testing platform.
- Cross-browser and cross-device implementation.
- Correct audience targeting and traffic allocation.
06
Quality assurance of every experiment
Purpose
- Make sure a broken variation never reaches your visitors.
- Protect the integrity of the data each test collects.
Methodology
- Functional QA on major browsers and devices.
- Goal and event tracking verification before launch.
07
Launch and monitoring of experiments
Purpose
- Run each test long enough to reach a reliable conclusion.
Methodology
- Sample-size and test-duration planning.
- Daily monitoring with guardrail metrics.
- Early stopping only on pre-agreed statistical rules.
08
Results analysis and knowledge iteration
Purpose
- Turn every test — win or lose — into knowledge that compounds.
Methodology
- Statistical readout with segment-level breakdowns.
- Documented learnings feeding the next round of hypotheses.
- Winning variations handed to your developers for permanent rollout.
One of the largest libraries of documented CRO case studies
Choose your test freely — every engagement is backed by documented, reproducible experiments.
| Sly Fox Porfolio | Agency A | Agency B | Agency C | |
|---|---|---|---|---|
| Published case studies | 120+ | 25 | 18 | 11 |
| Documented A/B tests | 1,500+ | 400 | 250 | 90 |
| Average documented uplift | 19% | 11% | 9% | 7% |
Placeholder comparison — replace with your own verified figures.
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Sly Fox Porfolio vs other CRO agencies vs in-house team
| Sly Fox Porfolio | A typical CRO agency | An in-house team | |
|---|---|---|---|
| Time to first experiment | First tests live within 3–4 weeks of kickoff. | Often 2–3 months while the team ramps up. | 6+ months to hire, onboard and build tooling. |
| Breadth of expertise | A full dedicated team: strategy, research, design, copy, development, QA and analytics. | Usually one or two generalists shared across accounts. | Limited to the skills you can afford to hire. |
| Cost structure | One predictable retainer, scaled to your testing velocity. | Retainer plus frequent out-of-scope charges. | Salaries, tooling and management overhead. |
| Accountability | Reported against agreed conversion and revenue KPIs. | Reported on activity (tests shipped), not outcomes. | Depends on internal leadership focus. |
Top clients and results
CloudMetric
The client
B2B SaaS
The challenge
Free trials signed up but rarely activated within the first week.
What we did
Onboarding funnel research and in-product experimentation.
Results
+47% trial-to-paid conversionAppVenture
The client
Mobile app
The challenge
Paid installs were cheap, but subscription starts lagged behind.
What we did
Paywall and pricing-screen A/B testing across 9 iterations.
Results
+58% subscription start rateFinch&Co
The client
Lead generation
The challenge
Landing pages converted below the industry benchmark.
What we did
Message testing, form redesign and social-proof experiments.
Results
+72% lead form submissions9 essential competencies in your dedicated CRO team
Project Manager
Keeps the experimentation roadmap on schedule and your team in the loop.
CRO Strategist
Owns the hypothesis backlog and the overall testing strategy.
UX Researcher
Runs usability tests, surveys and interviews to find out why users drop off.
Data Analyst
Builds funnels, segments and statistical readouts for every experiment.
UI/UX Designer
Designs each variation to be both on-brand and conversion-focused.
Copywriter
Writes and tests the messaging that moves users to act.
Front-end Developer
Builds pixel-perfect test variations without touching your codebase.
QA Engineer
Verifies every variation across browsers and devices before launch.
Data Scientist
Designs the statistics behind test sizing, duration and evaluation.
Our A/B tests win 1 in 3 times, meaning our alternative variations beat the control far more often than the industry average
Every variation we launch is grounded in research — and the control keeps every losing idea away from your revenue.
Our CRO/UXO products
| CRO Audit | Full-Service CRO | Landing Page Optimization | |
|---|---|---|---|
| Who is it for | Teams that want a prioritized roadmap before committing to a full program. | Companies with enough traffic to run continuous experimentation. | Performance-marketing teams whose paid traffic lands on underperforming pages. |
| What’s included | Analytics review, heuristic UX audit, research summary and a scored hypothesis backlog. | A dedicated 9-role team running research, design, development, QA and analysis end to end. | Message testing, page redesign and A/B-tested rollouts for your key landing pages. |
| Timeline | 3–4 weeks | Ongoing, monthly sprints | 6–8 weeks |
| Price | From $X,XXX (one-time) | From $X,XXX / month | From $X,XXX per page set |
| Book a consultation | Book a consultation | Book a consultation |
What do our clients say about us
“The research phase alone paid for the engagement. They found friction in our checkout that three previous audits had missed.”
Head of eCommerce, Storefront+
“Every experiment came with a clear hypothesis, a clean statistical readout and a documented learning. It changed how our whole team thinks about the funnel.”
VP Growth, CloudMetric
“We tried running CRO in-house for a year. Their dedicated team shipped more validated wins in one quarter than we had in twelve months.”
CEO, AppVenture
“What impressed me most was the honesty: when a test lost, they said so, explained why and fed it into the next hypothesis.”
CMO, Finch&Co
“The reporting is board-ready. I can trace every point of conversion uplift back to a specific experiment.”
Founder, Loopcart
“Onboarding took two weeks and the first winning test shipped in week five. Momentum never dropped after that.”
Product Director, Bluepeak
Estimate your profit gain and ROI from the CRO project
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Conversion Optimization Agency FAQs
A CRO agency helps its clients — eCommerce stores, SaaS platforms, apps, and lead-generation sites — convert visitors into buyers more effectively by optimizing UX/UI and copy.
The strongest programs pair data analytics and UX research with disciplined experimentation, so every change is validated before it becomes permanent.
A conversion rate optimization agency helps websites and apps turn more of their existing visitors into customers. That means researching user behavior, forming hypotheses about what blocks conversion, and validating changes to design, UX and copy through controlled experiments such as A/B tests.
Effective experimentation needs several disciplines at once — analytics, research, design, copywriting, development, QA and statistics. A full-service team covers all of them from day one, so tests ship faster and results are more reliable.
The first experiments typically launch within a month of kickoff. Meaningful, statistically validated uplifts usually appear within the first three to six months, and the compounding effect grows the longer the program runs.
It depends on your traffic, the scope of the program and testing velocity. Audits are one-time projects; ongoing programs are monthly retainers. Use the calculator above to sanity-check what an uplift would be worth to you before you invest.
Almost never. CRO works through targeted, evidence-based changes tested one at a time. Full redesigns without testing often hurt conversion because they change dozens of variables at once.
Against KPIs we agree on up front — usually conversion rate, revenue per visitor, average order value or lead volume. Every experiment gets a statistical readout, and wins are tracked through to permanent rollout.
As a rule of thumb, a page needs enough traffic to produce a few hundred conversions per variation within a reasonable test window. Below that, we lean on research-driven improvements and qualitative validation instead of split tests.
Yes — they complement each other. SEO grows the traffic, CRO grows the share of that traffic that converts. We coordinate test implementation so experiments never harm your search rankings.
Any business whose website drives revenue: eCommerce stores, SaaS products, mobile apps and lead-generation sites. The methodology is the same; the research and hypotheses are tailored to each funnel.
A monthly report covering every experiment: hypothesis, variation, statistical outcome, revenue impact and the learning it produced — plus a live dashboard so you can check progress at any time.
Yes. Mobile usually carries the majority of traffic and the lowest conversion rate, so mobile-specific research and experiments are a standard part of every program.
As soon as you spend meaningfully on paid traffic. Every improvement to a landing page multiplies the return on every ad dollar you are already spending.
