Experimento is the field journal for conversion and product experimentation. Real A/B teardowns, the maths behind significance, and the playbooks that move a funnel, written by people who ship the tests.
A practical 2026 comparison of the best A/B testing tools by what each one is actually good at, from Optimizely and VWO to GrowthBook and PostHog.
A practical 2026 comparison of the best A/B testing tools by what each one is actually good at, from Optimizely and VWO to GrowthBook and PostHog.
A/B testing tools compared for 2026: VWO, Optimizely, AB Tasty, Convert, GrowthBook, Statsig and PostHog, matched to marketing, CRO and engineering teams.
A practical guide to data-driven design: how to pair analytics with user research, run honest tests, and make product decisions on evidence, not opinion.
A practical guide to design ops (DesignOps): what it is, when you need it, the role of a DesignOps manager, and how to scale a design team without the chaos.
Free conversion rate confidence interval calculator. Enter visitors and conversions to get the margin of error and the true range your conversion rate is likely to sit in, using the accurate Wilson score method.
Nine real Optimizely alternatives for A/B testing and CRO in 2026, with pricing, strengths, and the exact team each one fits best.
A practical VWO vs Optimizely comparison covering pricing, statistics engines, features, and which platform fits mid-market and enterprise teams in 2026.
Free A/B test sample size calculator. Enter your baseline conversion rate and the smallest lift worth detecting to get the visitors per variation you need for a valid test.
Free A/B test significance calculator. Enter visitors and conversions for your control and variant to get the p-value, confidence level, and whether the result is statistically significant.
Free A/B test duration calculator. Enter your traffic, baseline conversion rate, and target lift to find out how many days your A/B test needs to run to reach significance.
Free CRO ROI calculator. Enter your traffic, conversion rate, and average order value to see the extra monthly and annual revenue a conversion rate improvement would generate.
UK conversion rate optimisation guide: real benchmarks, A/B test sample sizes, PECR and DUAA consent rules, checkout fixes, and a low-traffic playbook.
The conversion rate formula, three worked examples, the GA4 key event rate change, and why UK consent rules skew your number.
UK conversion rate benchmarks by industry, device and channel, using live British ecommerce data. Find where your number actually sits.
A seven-step CRO process framework for UK teams: research, prioritisation with worked PIE and ICE scores, free tooling, cadence and a learning repository.
How to find where your funnel leaks, diagnose why with recordings and segments, and fix the steps that lose the most revenue, with a free 2026 tool stack.
21 CRO best practices for 2026, each tied to a real figure: Baymard, IRP Commerce, Core Web Vitals and current UK CMA pricing rules.
Combine qualitative and quantitative conversion research to find what to test, with UK privacy rules, sample sizes and free tools.
Write A/B test hypotheses that survive scrutiny: the formula, the statistics, the UK consent rules, and honest win rates from real experiment data.
An honest look at whether CRO is worth it: the maths, real win rates, costs, the traffic threshold, and a decision framework for UK sites.
A practical UK guide to running a user experience audit: heuristics, severity scoring, UK cost and accessibility law, and how to act on the findings.
A practical UK guide to electronic product design and development: real stage costs, timelines, CE/UKCA rules, firmware budgets, DFM and tool choices.
How to choose a UX design recruitment agency that fits your team: when to use one, what to ask, fee structures, and the alternatives worth weighing first.
What is UX research? A practical guide to the main user research methods, when to use each, the tools involved, and how to pick the right one for your question.
How SEO and user experience work together in 2026, from Core Web Vitals and page experience to the on-page UX signals that quietly move rankings.
When to hire a user research agency versus building an in-house team: the real trade-offs in cost, speed, objectivity and knowledge for product teams.
What is digital product design, the stages of the process, and how a product designer differs from a UX designer. A practical guide for teams building software.
A practical guide to UX designer jobs in the UK: realistic salaries by level, where to find roles, what hiring managers want in 2026 and how to stand out.
Augmented reality testing explained: the QA methods, real challenges and tools teams use to test AR and VR products that work in the real world.
Inclusive design examples and the principles behind them: recognise exclusion, learn from diversity, and solve for one to extend to many, with real cases.
How to build a career as a UX designer: the skills that matter, degree vs bootcamp routes, portfolio steps and realistic UK salaries at each level.
What is user experience? A plain-English introduction to UX, how it differs from usability and UI, the ISO definition, and how teams design it deliberately.
A practical guide to product designer jobs: what the role covers, the skills and portfolio employers want, realistic UK salaries and where to actually apply.
What a user experience manager does day to day, the skills employers screen for, realistic UK salaries, and how to progress to head of UX.
A practical guide to user researcher jobs in the UK: how to get in without experience, the skills and portfolio employers want, and realistic 2026 salaries.
A realistic guide to product tester jobs in the UK: the legit consumer panels, paid software and usability testing gigs, what you earn, and how to spot scams.
A practical mobile app testing guide: the test pyramid, choosing between Appium, Espresso and XCUITest, real devices vs emulators, and the Play Store gate.
A practical visual regression testing guide: how it works, the 2026 tools that matter, how to cut false positives, and where to fit it in your pipeline.
Manual testing vs automated testing in software testing, when each pays off, and how to split your effort so quality goes up and costs come down.
Software testing methodologies compared without the glossary: how Waterfall, Agile, V-model and shift-left actually differ, and how to choose by release cadence.
What is interaction design (IxD)? A clear definition, the five dimensions, core principles, and how it differs from UX and UI design.
Free minimum detectable effect (MDE) calculator. Enter the visitors per variation you can realistically get and your baseline conversion rate to find the smallest lift an A/B test can reliably detect.
VWO moves to app.wingify.com after the AB Tasty merger, Optimizely launches a full AEO platform, and Opal gets EU hosting. June 2026 CRO news.
Optimizely's Opal adds experiment-prioritisation agents, its MCP server brings testing into Claude and ChatGPT, and Amplitude's Statsig takeover raises roadmap questions.
Google's Consent Mode change reshapes measurement, Optimizely ships EU events export, Statsig details its Amplitude integration, and PostHog tightens replay privacy.
Optimizely's Idea builder generates tests with Opal, Statsig opens feature-gate reviews over its API, VWO ties heatmaps to feature experiments, and PostHog sets a default MDE.
Free ICE score calculator. Rate each experiment idea on Impact, Confidence and Ease, then rank your A/B test backlog so you always run the test with the best payoff first.
Optimizely opens a code-first editor and browser companion, Statsig extends review approvals to whole experiments, and PostHog ships an OpenFeature provider.
Free sample ratio mismatch (SRM) calculator. Enter the users each A/B test variant received and get a chi-square check that tells you whether the split is broken and the result should be thrown out.
A step-by-step guide to writing a design brief, including a full design brief example, a free template, and the sections that stop projects going sideways.
GrowthBook ships its 5.0 platform, Statsig splits config edit and delete permissions, and PostHog fixes survey targeting races in its web SDK.
GrowthBook publishes Ronny Kohavi's rules for trustworthy tests, Optimizely ships local holdouts, and its Web editor turns any element into a metric.
A practical guide to performance testing services, stress testing, load and soak tests: when to run each, the metrics that matter, and the tools teams use.
Write A/B test hypotheses that survive scrutiny: the formula, the statistics, the UK consent rules, and honest win rates from real experiment data.
The conversion rate formula, three worked examples, the GA4 key event rate change, and why UK consent banners skew your number.
UK conversion rate benchmarks by industry, device and channel, using live British ecommerce data. Find where your number actually sits.