Reach the answer sooner
Complete, server-side data means significance comes faster — you're not waiting on the 70% of events that survived an ad-blocker to add up.
why complete data reads fasterNo flash. No lost events.
A faster answer.
Mtrix picks each shopper's variant on the server in ~15ms — before the first pixel paints. The right page renders first, with no flicker and no slow-down. Every event is counted server-side, where ad-blockers can't drop it. And complete data gets you to a result you can trust in days, not weeks.
Server-side · Decided before the first paint
~15ms
to decide the variant on the server — before the first pixel paints. No flash, no swap.
illustrative of the founder-asserted ~15ms100%
of events counted server-side, in the request that serves the page — nothing dropped by ad-blockers or ITP.
daysnot weeks
to a result you can trust — complete data reaches significance faster, and reports read live.
The browser is the wrong place to run your test.
Client-side tests load your original page, then flash and swap to the variant — or hide the whole page for 50–150ms to cover it. Either way the shopper feels the seams, your Core Web Vitals take the hit, and the flash skews the very result you're betting on. Decide on the server, and the right page simply renders first.
Client-side
Server-side · Mtrix
Flash / swap
Original page loads, then flips to the variant a beat later.
The right page renders first. There is nothing to swap.
Page speed · Core Web Vitals
A render-blocking snippet and a late layout shift drag LCP and CLS.
No snippet on the page, no shift — your vitals stay clean.
SEO & crawlability
Variants injected after load can confuse crawlers and risk cloaking.
Split-URL and mask-URL tests — your rankings stay intact.
The decision
Made in the browser mid-load — or read from a cache that can be stale.
Made fresh on the server in ~15ms, before the page is built.
Decide on the server, and there's no wrong page left to hide, flash, or apologize for.
You're not losing shoppers. You're losing their events.
Ad-blockers, ITP, and privacy settings quietly drop client-side tracking — so part of every test is measured on data that never arrived. Mtrix sends each event from the server, in the same request that serves the page. Your winner is decided on all your traffic, not the slice that made it past the blockers.
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Sent from the server
Each event fires in the same request that serves the page — not from a script an ad-blocker can refuse to load or a network call it can drop.
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Nothing to block or clear
No third-party pixel, no tracking cookie for ITP or a privacy setting to strip. There's nothing sitting on the page for a blocker to catch.
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One identity, every device
Every event ties to the variant that shopper was served — across phone and laptop — so your attribution stays whole, not stitched from fragments.
A winner measured on 70% of the data isn't a winner — it's a guess with a confidence bar.
A result you can trust — in days, not weeks.
Complete data reaches significance faster and stops you burning traffic on a test that's already decided. Events land in your reports live — no client-side lag, no overnight batch — so the read is always current, and the winner ships the moment it's called.
Read it live, ship in one click
Reports update in real time, not an overnight batch. And because the winning variant already runs in your backend, you roll it out the moment Mtrix calls it.
One platform, nothing to reconcile
The result sits beside the session replays, Core Web Vitals, and errors for each variant — so you see why it won and what to test next, without stitching a second dashboard.
The winner never travels alone —
Session replay
Watch shoppers on the winning variant
Core Web Vitals
FCP · LCP · CLS, per variant
Errors
The bug that sank the loser
Test the price, the bundle, the checkout — not just the button.
Surface tweaks — copy, color, a hero image — are the shallow end. Server-side lets you test the surfaces that actually decide a sale: what you charge, what you bundle, the offer, and the path through checkout. The deeper you test, the more revenue's on the line.
Pricing & offers
A price point, a discount structure, a free-shipping threshold — your most sensitive lever, with the shopper seeing one clean price instead of the old one flashing to the new.
Bundles & cart
Bundle makeup, add-on offers, and what shows in the cart — set before render, so there's no jump on the page where shoppers are closest to buying.
Checkout flow
The steps, the fields, and the layout of the flow shoppers move through to buy — the highest-stakes path on your store.
You test the flow you already run. Mtrix doesn't replace your checkout or payments.
Landing & product pages
Full-page rewrites and entirely different versions, served clean from the first paint — on the page that sets the first impression.
Anyone can test a button. Server-side is how you test the things that move the revenue number.
No rebuild. No replatform. No dev team.
Shopify or custom — connect it and launch your first server-side test this afternoon.
- No migration — runs on your Shopify or custom build
- No new checkout — Mtrix doesn't replace your checkout or payments
- No engineering org — you don't need a dev team to test server-side
The questions you're already asking.
Pull it in one click and every shopper is back on the original instantly. You can also set a guardrail so Mtrix pulls a variant automatically if it starts dragging your conversion or revenue down — your store is never left bleeding on a bad test.