A test earns its place when the question, measurement and decision are clear before anyone sees a variant. We investigate where people get stuck, run the experiment and read the result with Analytics.

Some of the 500+ brands we've worked with

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We agree on the evidence, validity checks and decision owners before implementation starts.

Conversion & experimentation

Campaign Landing-pageExperimentation

The campaign promise and journey evidence shape the landing-page experiment. We write the decision rule before exposure begins.

Live campaign traffic changes the test. The ad's promise, eligibility and tone stay intact on the page while one change is measured against the approved conversion.

FrictionResearch

We read behavior data, qualitative feedback, technical constraints and campaign context together. No single tool gets treated as proof.

No heatmap or handful of recordings settles a cause on its own. Every input is logged with its source and confidence before a hypothesis may be written.

ExperimentQuality Control

The experiment contract records the primary metric, guardrails, exposure plan, QA status, stopping logic, exclusions and analyst review.

A verdict holds only when guardrails, stopping logic and the analyst review were agreed before exposure.

Conversion ResearchAudit

Before we write a hypothesis, we bring analytics, session data and qualitative research into one map of journey friction and opportunity.

Competing theories about one page are the signal for this one. Analytics, recordings, accessibility and technical checks come back as a register ranked by evidence strength.

Experiment HypothesisRoadmap

We order experiment hypotheses by the evidence behind them, the proposed mechanism, expected impact, risk and dependencies.

More hypotheses than run windows is the condition here. Impact, evidence strength and effort get scored on one rubric, and conflicting tests move into separate windows.

A/B TestDesign & Analysis

We define the A/B test before build, check it before launch and report the result against the original decision rule.

Take this one while the statistics are still open, because minimum detectable effect, sample size, randomization unit and stopping rule get settled before the build.

Form & CheckoutOptimization

Forms and checkout expose friction field by field. We use the biggest drop-off points to decide what belongs in the experiment plan.

A step-level drop with no field behind it points here. Focus, error and abandonment events per field separate a confusing input from one that simply loads slowly.

Funnel Friction & JourneyDiagnostics

We map behavior and qualitative evidence across the funnel to see where people leave and where the problem may have started.

Use this one where the journey crosses several pages and the visible exit may not be the cause, since backtracking and re-entry have to stay in the evidence.

ExperimentImplementation & QA

Before launch, we record how the variant behaves across devices, who receives it, whether tracking works and what the performance and visual checks found.

Once tests run often enough that checks by feel become the risk, the release gate moves here, covering the device matrix, assignment logs, accessibility and a rehearsed rollback.

Experiment LearningRepository

Past tests stay searchable with their evidence, decision and contradictions attached. That history helps us sharpen new hypotheses and avoid running the same unsupported idea twice.

Past tests stop being useful once nobody can find them. Here they are rebuilt into one record format, tagged by mechanism and audience, with contradictions flagged for review.

Where this work is owned

AnalyticsDependency

Analytics provides trustworthy event definitions, segmentation, reconciliation and interpretation support.

Trustworthy event definitions come before any variant is worth building, and they are owned by the measurement team.

Reliable Analytics comes first because experiments need trustworthy measurement. CRO covers the research, hypothesis, QA, analysis and implementation decision for the experience in scope. Even a well-run test can end with a null, negative or invalid result.

We keep observations separate from assumptions, agree on the decision in advance and use QA and guardrails to protect users and measurement. Null and negative results stay in the record because the next decision may depend on them.

A test earns its place when the question, the measurement, and the decision owner are settled in advance.

We trace the journey through user evidence, event definitions, and traffic shape, record the technical limits and consent requirements, then write an experiment contract naming the mechanism, primary metric, guardrails, eligible population, variants, expected decision, and the reasons a result may be invalid. Zeo runs research, design, QA, analysis, and the implementation recommendation; the business decision and the release stay with your owner, and reliable Analytics is a dependency we do not also own. Null, negative, and invalid results stay in the record, because the next decision often depends on them more than a win would.

Each question stays attached to its validity checks, result and decision owner.

The journey and its measurement baseline
We trace the journey through user evidence, event definitions and traffic shape. Before a hypothesis moves forward, we record the technical limits, consent requirements and who owns the business decision.
Write the experiment contract
The mechanism and primary metric define the claim under test. The same contract carries guardrails, eligible population, variants, expected decision and the reasons a result may be invalid.
QA before wider exposure
Copy, layout and accessibility go through review alongside analytics, audience assignment, performance and rollback. Exposure increases only after those checks.
Decide with uncertainty visible
Sample-ratio checks, segments, guardrails and practical effect sit beside the main result. Together they support a ship, iterate, stop or gather-more-evidence decision.
Start a CRO Experiment Plan

These clients describe the planning, measurement, and communication they experienced while working with Zeo.

International success stories and the segmentation and diversity of Zeo Agency's clients were the main reasons we chose to work with them in the first place. At our very first meeting, we were convinced by their expertise. They think like us, they work like us, and they behave like us. What sets them apart from other service providers is discipline and communication. After working with them, we saw a significant increase across Foriba's digital channels. Thanks to them, we gained quality traffic and potential customers, which gave us more meetings with good leads and directly affected sales.

Serkan Haşlak - Marketing Director

Before working with Zeo, we had serious problems, especially with planning and measurement. Because we couldn't get complete measurements and reports, we struggled to evaluate our work. Evaluating the data correctly, in line with scientific rules, was the most important thing for us. At Zeo, there is a culture of measurement and evaluation above all else. We are impressed that their approach is entirely data-driven. We are glad that they take ownership of their work, give constant feedback, and stay in a continuous improvement cycle. Together, we have found ways to win more customers while spending less.

Dr. Kadir Kırmızı - General Manager

Before we started working with Zeo, we believed we couldn't get a return on our investment in Google Ads or run performance optimization properly. Once we were confident that campaign performance management was in expert hands, we could devote all of our time to development and integration. Our old campaigns gave way to campaigns that are built faster, localized without any burden on us thanks to Zeo's business partners, constantly optimized, and trackable in real time via dashboards, with conversion tracking that comes through in practical, detailed, and easy-to-read reports. We see Zeo as part of our team, no matter the location.

Serhan Demirel - International Digital Marketing Manager

Traffic that already existed, converting at a rate the client could feel.

Armağan Oyuncak

Paid Search - Transactions: +2121%, Revenue: +2413%

İstikbal

87% Increase in Organic Sessions!

MediaMarkt

Organic Conversion Rate (YoY): 111+%

Paid Search, Paid Social, CRO, and Programmatic each run under a named owner at Zeo. The consultants below are matched to the channel this page is about, so you can see who you'd actually work with.