Changes you can trace.
GitHub workflows, peer review and dependency checks bring decisions into the release process.
4.9 / 5Optimizely agency for tests that end in a decision.
We plan, build and read Optimizely experiments and personalised journeys on your website, so every test answers a real business question.
Selected work, in motion.
The websites we test, build and improve.Where we fit
Fewer tests. Better answers.
Experimentation programmes stall for familiar reasons: tests nobody can build quickly, results nobody trusts and winners that never ship. We sit between your ideas and your site. We write the hypothesis, build variants in Optimizely Web or Feature Experimentation, check the tracking and turn results into changes that go live.
Optimizely services
Optimizely consulting and delivery.
Five services covering the programme, the code and the data behind it.
Build tests in code
SDK integration and server-side experiments for changes a visual editor cannot handle.
Run a testing programme
A prioritised hypothesis backlog, experiment builds and results reviews that end with a ship or stop decision.
Lay the foundations
Installation, audiences, events and tracking validated before your first test goes live.
Personalise key journeys
Audience-specific content on the pages where context changes what visitors need to see.
Connect your analytics
Experiment exposure linked to your analytics, CRM and release workflow, so every team reads the same result.
Ready for Optimizely?
Optimizely is an enterprise tool. It pays off when you have the traffic and the team to use it.
A good fit if
- Your key pages get enough traffic to reach a result in weeks
- Several teams want to test and need shared governance
- You need server-side tests as well as page changes
- You already pay for Optimizely and want more tests shipped
Not the right fit if
- Your traffic is too low for reliable tests. Start with research and PostHog.
- You need an Optimizely CMS build or upgrade. Look for a specialist CMS partner.
- You want a quick win without a testing process behind it
We also run experiments in PostHog, which often suits smaller and product-led teams better.
Tests need good plumbing.
An experiment is only as good as the data around it. We connect Optimizely to the rest of your stack.
Every ecosystem, five ways in
Security, by consideration.
Trust is part of the build.
For your Optimizely project, we consider publishing access, experiments, audience data and connected services as part of one connected build.
See our approachConnected systems. Considered safeguards.
Protected in transit.
Certificate configuration, HTTPS and secure headers help protect the path between your users and your systems.
Intelligence with limits.
Scoped tool access, validated inputs and human approval where automated actions carry consequences.
Hypothesis to decision.
Every experiment runs through the same four steps, and each one ends in a call.
- 01
Find the question
We review analytics, research and past tests to build a backlog ranked by value and effort.
- Journey review
- Hypothesis backlog
- Test priorities
- 02
Design the test
Variants, audiences, primary metric, sample size and stop rules agreed before any build.
- Experiment brief
- Audience rules
- Measurement plan
- 03
Build and check exposure
We build the variants, then confirm visitors see what they should and events reach your analytics.
- Variant build
- Tracking validation
- QA sign-off
- 04
Decide and ship
We read the result with you, ship the winner and record what the test taught you.
- Results review
- Decision record
- Next test
Built for what’s next.
Built to driveMore sign-ups.
Built to driveMore memberships.
Built to driveBetter-qualified leads.
Built to driveMore qualified candidates.
Built to driveMore enquiries.
Built to driveMore qualified demos.
Built to driveMore workplace demos.
Built to driveMore business accounts.
Built to driveMore free trials.
Built to driveMore building owners.
Built to driveMore free sign-ups.
Private Villas MexicoBuilt to driveMore direct bookings.
Built to driveMore committed players.
Built to driveMore returning customers.
Built to driveMore meaningful demos.
Built to driveBetter talent connections.
Built to driveMore course creators.
Built to driveMore product discovery.
Trusted across our practice
Working together. In their words.
Independent reviews. Long-term working relationships.
“Stega Creative team not only understood our needs and vision for the websites, but they also came up with improvements.”
“We’ve been working with Stega & Gabriel for the last two years. Cannot recommend them enough. They’re responsive, professional & an asset.”
“After a website (re)launch, they are also always accessible and happy to help. I highly recommend everyone who is looking for a new and more stable website in Webflow, to work with Stega!”
Optimizely questions, answered.
A few things worth discussing before your Optimizely project takes shape.
What does an Optimizely agency do?
An Optimizely agency plans, builds and analyses experiments and personalisation in Optimizely. Stega writes hypotheses, builds variants in Optimizely Web or Feature Experimentation, validates tracking and turns results into site changes. Our focus is experimentation, not Optimizely CMS builds.
How much does an Optimizely testing programme cost?
The cost depends on how many experiments you run, whether they are client-side or server-side, and how much analysis you need. Optimizely licences are billed separately by Optimizely.
How long does it take to launch a first Optimizely test?
Later tests move faster because the tracking and audiences already exist. Each experiment then runs until it reaches its planned sample size.
How much traffic do you need for Optimizely A/B testing?
Optimizely A/B testing needs enough conversions per variant to detect the change you care about within a few weeks. Low-traffic pages produce inconclusive results. We calculate sample sizes before building anything, so you know whether a test is worth running.
Is Optimizely worth it compared with PostHog or VWO?
Optimizely is worth it when several teams run many tests and need governance, server-side experiments and enterprise support. Smaller teams often get similar answers from PostHog or VWO at a lower cost. We recommend the tool that matches your traffic and your team.
Does client-side Optimizely testing slow down a website?
Client-side Optimizely testing adds a script that can delay rendering and cause flicker if it is set up carelessly. We load the snippet correctly, keep experiment code lean and move heavy tests server-side with Feature Experimentation. Page speed is checked before and after launch.
Revamp today.The 
way.
Your ambition. Our collective craft.
Strategy, design and technology, working as one.