Most platforms give you the tools to run experiments. Webyn tells you which experiments to run, allocates traffic automatically, and stops tests as soon as the data is conclusive.
Webyn combines a lightweight JavaScript SDK with a server-side inference engine that processes events in real time.
Install the Webyn SDK with one async script tag. The SDK fires page view and conversion events to the Webyn edge network, with average collection latency under 15ms. Works on any CMS or custom stack.
The Webyn Visual Editor lets you modify any DOM element — text, images, CTAs, section layouts — without touching production code. Variants are served at the edge using server-side rendering to eliminate flicker.
The multi-armed bandit engine adjusts traffic distribution every 15 minutes based on conversion probability. High-performing variants get more traffic immediately — not after the test is done.
Webyn monitors posterior probability continuously. When a variant reaches 95% probability of being the best, the test concludes and the winner is deployed automatically or flagged for manual approval.
Based on which page elements drove the largest uplift, Webyn's recommendation engine surfaces the next highest-expected-value hypothesis. You approve it; the engine runs it.
Webyn covers the full experiment lifecycle — from hypothesis to deployment — without requiring a data scientist in the loop.
Webyn implements Thompson Sampling, a Bayesian exploration-exploitation algorithm that continuously re-weights traffic toward better-performing variants.
In head-to-head comparisons against fixed-split A/B tests, this approach reduces the cost of running losing variants by an average of 40%.
Experiments run until statistical confidence is met — not until a calendar date. Tests on high-traffic pages often conclude in 48–72 hours.
Point-and-click editing of any page element: headlines, subheadings, button text, hero images, layout blocks, and form labels. Changes are stored as structured diffs, not raw HTML.
The editor supports multivariate tests (MVT) with up to 8 variants simultaneously. It also supports full-page redirect tests for major redesigns.
Preview mode renders each variant in an isolated iframe before launch so your team can approve visuals without pushing to production.
Variant assignment happens at Webyn's CDN edge — before the page HTML reaches the browser. This eliminates the "flash of original content" that degrades user experience in client-side A/B tools.
Edge nodes are located in Frankfurt, Paris, Amsterdam, and London. Average time-to-first-byte overhead: under 4ms.
Variant delivery is compatible with Next.js, Nuxt, Astro, and all major static site generators.
Experiments can be scoped to specific visitor segments: device type, browser language, UTM source, returning vs. new visitor, and custom JavaScript attributes.
Segment logic is evaluated at the edge using Webyn's attribute store, which accepts real-time trait pushes from your CDP or backend via the Identify API.
Overlap prevention ensures that visitors in overlapping experiments are bucketed into only one active test per page zone.
Webyn connects to Google Analytics 4 (via Measurement Protocol v2), Segment (as a destination), Mixpanel (via HTTP API), and Amplitude. Conversion events are enriched with experiment metadata before forwarding.
For Shopify merchants, Webyn connects directly to the Shopify storefront events API and tracks add-to-cart, checkout initiation, and purchase as conversion goals without any custom code.
Raw event data is also available via a daily CSV export or a streaming Snowflake share.
Webyn processes all data on AWS eu-west-3 (Paris). No visitor PII is stored — identifiers are pseudonymous hashes with a configurable TTL of 7 to 90 days.
The platform supports consent-mode integration: experiments are paused for visitors who decline cookies until consent is granted. Webyn is compatible with OneTrust, Axeptio, and Cookiebot consent flows.
A Data Processing Agreement is provided automatically on signup. SOC 2 Type II audit is scheduled for Q3 2025.
Technical specifications for engineering and data teams evaluating Webyn.
Our team will set up a live demo on a page you choose — not a generic sandbox. Bring your own URL.
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