A/B Testing Agency
A/B testing agency: experimentation that drives ROI
Every variation counts. We design data-driven tests, segmented by real user behavior. Copy, visuals, AI-automated blocks. Multi-channel deployment across your key channels: TikTok, Meta, landing pages, email. Rigorous statistical tracking, continuous learning, decisions based on actual conversions. The goal: lift your rates, optimize your budgets, maximize your performance.
A single test isn't enough — you need an experimentation strategy built for conversion
An A/B test is only as good as its design and the impact of its learnings. We build results-oriented protocols, automated by AI, segmented by real user behavior. Every test connects your Paid, Product, and UX priorities. Multi-channel deployment, rigorous statistical tracking, clear decision-making. The goal: validate what works, eliminate what holds you back, amplify what converts.
Identify the critical elements to test
Blocks, headlines, visuals, CTAs: every element is prioritized by impact. Data guides the test plan, AI automates the variants.
Segment by real user behavior
Tests run on targeted groups: scroll depth, frequency, acquisition source, device. Every variation is contextualized, every learning is relevant.
Deploy on the right channels
TikTok, Meta, email, landing pages: we run tests where they matter. The goal isn't to test everywhere, but to optimize where it performs.
Measure with precision, iterate with rigor
Every test includes statistical tracking, significance measurement, and automated learning. No gut-feel decisions: everything rests on results.
Connect Paid, Product, and UX
We test what actually moves the business: funnels, messaging, visuals, placements. The approach is cross-functional, the goal is shared: performance.
Maximize the impact on your conversions
A good test isn't there to teach you, it's there to help you decide. Better variation = better ROI. We don't test for testing's sake, we test to win.
Your A/B testing powered by the platform we built
We don't just set up experimentation for you: we run it on our own channels. data.junto.fr, our proprietary platform, ingests data from 8 ad platforms plus SEO into BigQuery every morning through our own server-side tracking — the foundation reliable tests are built on. Before calling a single variant, our Trust Analyzer grades the reliability of your data collection from A to F, and our Industry Benchmark positions your conversion rates against a portfolio of 350+ brands, so you know what's actually worth testing. You're not handing your decisions to passing consultants, but to the data engineers who run a multi-channel platform in production.
The strategic benefits of a well-structured A/B testing approach
Decisions grounded in evidence
Every tested variation produces a measurable result. You no longer decide on instinct; you decide on hard data.
Optimized acquisition budgets
Campaigns are adjusted based on what actually converts. Less wasted media spend, more profitability per channel.
Continuous improvement, built in
Tests feed automated learning. What you validate today fuels tomorrow's performance.
An experimentation methodology built for performance
At Junto, an A/B test is never a simple optimization exercise. It's a results-driven learning strategy. Generative AI, behavioral segmentation, multi-channel deployment, statistical tracking: every protocol is designed to generate actionable insights and feed clear decision-making. This isn't just testing — it's steering.
Precision, rigor, and impact at every iteration
We combine AI, method, and hands-on expertise to guarantee tests that are actionable, not just elegant. Every hypothesis is prioritized by its conversion potential. Every result is significant, documented, and tied to your Paid, Product, or UX priorities. The goal: turn the winning variation into an operational standard.
Why professionalizing your A/B testing strategy changes the game
A poorly designed A/B test skews your decisions, slows your optimizations, dilutes your results. By structuring a rigorous approach — AI, segmentation, statistics — you validate what actually converts. You test better and faster, to spend less and earn more. Experimentation becomes a growth lever, not just a routine.
A clearer read on performance
You test what matters, not what feels safe. Every learning is clear, documented, and actionable.
Operational time savings
Tests are automated, analyses are cross-referenced, decisions come fast. Less friction, more decision-making.
A culture of disciplined iteration
A/B testing becomes a structuring reflex, aligned with your product cycles, your campaigns, and your business roadmap.
Built-in statistical safeguards
Significance, sample sizes, standard deviations: every result rests on solid ground. No approximation, no misinterpretation.
Evidence-based decisions
You stop debating and start deciding on measured results. The impact is real, and the choices are owned.
Direct impact on ROI
Better segmentation, better testing, better adjustments: every winning variation is fed back into your growth engine.
How we support you across the
full funnel
Google Tag Manager & media synergy
A well-structured container strengthens advertising performance.
By tracking the signals that matter (scroll, clicks, time spent, source),
we improve audience quality, targeting precision
and the true measurement of your conversions.
Data-Driven Design
Data insights fuel our creative process, letting us design user experiences that aren't just beautiful but highly functional. Every design element is tested and validated with real data to capture attention and convert
Analytics-Driven SEO
Data informs our SEO strategy. By decoding search trends and evaluating keyword effectiveness, we optimize your content to resonate with current demand and climb the search rankings
Data-Powered CRM
Data enriches your CRM, providing a deep understanding of customer journeys. That knowledge lets you automate and personalize interactions for stronger retention and higher customer lifetime value
An A/B testing agency that turns your variations into decisions
Discover our case study Nodaleto
-50%diminution du CPA
Nodaleto is an Italian luxury footwear brand with a daring style. To support its growth, it called on Junto to optimize its digital acquisition campaigns, structure its media strategy, and maximize return on investment.
Discover our case study PwC
x3d’investissement
PwC, a major player in consulting and audit, brought in Junto to structure its digital presence and strengthen its marketing performance. The goal: activate the right channels (paid search, SEO, paid social) with a key-account B2B focus and tailor-made tactical execution.
Discover our case study Sisters Republic
x6augmentation du ROAS
Sisters Republic offers a range of reusable, zero-waste period underwear and swimwear. To accelerate its growth and succeed in its international expansion, the brand brought in Junto to optimize its media acquisition strategy and maximize its ROAS.
Frequently asked questions from our clients
Have questions? You're not alone. To help, we've gathered the questions our clients and prospects ask most often
Why outsource your A/B tests?
Because a good test isn't enough — you need a strategy. We bring the method, the data, and the tools to deliver measurable results.
What types of tests can you run?
Copy, visuals, headlines, entire pages, funnels… We prioritize by potential upside, not by ease of execution.
Do you use AI to generate variants?
Yes. AI accelerates production, multiplies iterations, and optimizes messaging without weighing down your processes.
Can you test across multiple channels in parallel?
In fact, it's essential. We run cross-channel tests on TikTok, Meta, landing pages, CRM… to maximize overall impact.
How do you select the audiences to test?
Based on real behavior. Scroll, clicks, time spent, device: every segment is defined to reflect reality on the ground.
Do you have a reliable statistical framework?
Yes. We track significance, sample sizes, and margins of error. No decision without solid ground.
How long does a typical engagement last?
It depends on the scope, the volume of tests to run, and the channels involved. We define a clear roadmap from day one.
Do you work with our in-house teams?
Yes. We work with your product, media, CRM, or UX teams to keep the whole experimentation program consistent.
How much does an A/B testing engagement cost?
Every engagement is built to order. The budget depends on complexity, test volume, and your business goals.
How do you know if a test really "worked"?
We're not looking for an aesthetic "winner" but a clear gain: better conversion rate, higher average order value, stronger activation. A test has to move things forward.
