See what actually works
A/B testing with a <5KB SDK, visual editor, and real-time statistical results. Built for teams who ship fast and measure everything.
Experiments
| Experiment | Status | Lift |
|---|---|---|
| Homepage headline v2 | Running | +18.3% |
| Pricing CTA color | Winner | +11.7% |
| Signup form layout | Paused | -2.4% |
| Mobile nav redesign | Draft | — |
Features
Everything you need to experiment
A complete A/B testing platform in under 5KB.
Visual Editor
Change headlines, buttons, images, and layouts directly on your live site. No code required — just point, click, and edit.
<5KB SDK
The lightest A/B testing SDK on the market. Zero dependencies, lazy-loaded debug tools. Your site stays fast.
Statistical Engine
Bayesian probability-to-win, confidence intervals, and sample size estimation. Know when your results are real.
Real-Time Results
Watch conversions, lift, and confidence update as visitors arrive. No waiting for batch processing.
Experiment Health
SRM detection, guardrail metrics, and traffic balance monitoring. Catch broken experiments before they waste time.
Multi-Variant Testing
Test more than two variants at once. A/B/n testing with automatic traffic allocation and winner detection.
How It Works
Three steps to your first experiment
Go from zero to running experiments in under two minutes.
Install the SDK
One script tag before </head>. That's it. The SDK loads asynchronously and won't slow down your page.
Create an experiment
Use the visual editor to change anything on your page — or write targeting rules for developer-controlled experiments.
Ship what works
Watch results in real-time. When Optik detects a statistically significant winner, ship it with confidence.
Developer Experience
One line of code.
Zero dependencies.
The Optik SDK is under 5KB gzipped — smaller than most favicons. It loads asynchronously, applies experiments before first paint, and never blocks your critical rendering path.
- Loads async — zero impact on page speed
- Applies variants before first paint (no flash)
- Debug panel built-in (?optik_debug=true)
- Chrome DevTools extension for developers
- TypeScript definitions included
<!-- Paste before </head> --><scriptsrc="https://cdn.optik-app.com/sdk/optik.js"data-project="pk_your_project_key"defer></script><!-- That's it. Experiments run automatically. -->
Built for performance
Every byte matters. We obsess over performance so your site stays fast.
Results Dashboard
Statistical clarity, not guesswork
Bayesian probability-to-win tells you which variant is better and how confident you should be. No more squinting at p-values.
Homepage Headline Test
Running for 14 days · 12,482 visitors
Learn how teams build better products
Ship experiments, not guesses
Test everything. Ship what works.
FAQ
Frequently asked questions
Everything you need to know about Optik.
Sign up for the beta
We're onboarding teams now. Drop your info and we'll get you set up.