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Be the business they remember.

Sylvius gives your website depth and atmosphere to create unforgettable connections, then lets you test what works on your own visitors.

Get started See how it works

In our own surveys, 78% of 251 viewers preferred photos and video shown with Sylvius. How we ran them

From $99 a month.

Proof

Tested on your own visitors

Start a test in the Console and Sylvius splits your visitors at random. One group sees your site with its current calibration; the other sees a preset added to it. Sylvius compares time on the page, scroll depth, pages per visit, bounce rate and any conversion you track, and it counts a difference as a finding only at 95% confidence.

What viewers told us in our own surveys

  • 78%preferred photos and video with Sylvius to the same media without it195 of 251 viewers
  • 73%said the version with Sylvius left a longer-lasting impression183 of 251 viewers

Run by VRILLE, the company behind Sylvius, in March, August and September 2026: 251 viewers took part across 3 rounds of 134, 50 and 67, each shown video and photo with and without Sylvius (in September, rendered with the Fregoli Version 1.0 calibration). These are surveys of viewers, not results measured on a customer’s website.

Example

Feel the same emotions as on screen

A sample website built around one photograph of an evening field, rendered through the Fregoli calibration. The business name and address are placeholders.

Without Sylvius
A field of tall grass at sunset, the sun low on the horizon under scattered clouds, without Sylvius
With Sylvius
A field of tall grass at sunset, the sun low on the horizon under scattered clouds, with Sylvius
Why now

Each visit counts for more

Fewer clicks from search

AI answers more questions on the search page, so fewer people click through to a website. Each visitor who does arrive is worth more.

More sites that look alike

AI site builders make a good-looking site easy, so more sites look the same. How a site feels can’t be copied from a template.

Start in October, see results before the holidays.

Who it’s for

For businesses people compare before they choose

Local services

Customers compare several quotes in a row. Give them the site they remember when they decide.

Shops, restaurants and venues

Bring atmosphere to your site before the busy season, on the pages people already visit.

Agencies

Offer Sylvius as a recurring add-on for the clients you already have. Each client gets its own workspace, and you move between them from one sign-in.

Multi-location brands

Add each location as its own website, and test each one on its own visitors.

How it works

One line of code, no rebuild

Sylvius renders your pages with a spatial interface. Your calibration, such as Sylvius Deepview X, sets how it looks. Your content, code and forms stay as they are, and Sylvius never intercepts a click.

  1. Add your website

    Create a workspace and add your site in the Console.

  2. Add one line

    Paste the script tag into your site’s head, or add it with Google Tag Manager.

  3. Verify your domain

    Prove you own it with a meta tag, a DNS TXT record or a file. Nothing shows until you do.

  4. Choose a calibration

    Pick one in the Console. Sylvius appears within about a minute, once your plan is active.

index.html
<!-- Sylvius — place in <head>, before </head> -->
<script
  async
  src="https://cdn.sylviusforweb.com/v1/sylvius.js"
  data-sylvius-key="pk_live_…"
></script>

A Sylvius representative will help you install your site tag and TXT record, on every calibration.

Contact Sylvius

Removing it

Pause the website in the Console, and new page loads stop showing Sylvius within about a minute. Or delete the line from your site.

Read the docs for installation, domain verification, conversion tracking and Content Security Policy entries. No account needed.

Pricing

Five calibrations, from $99 a month

Each calibration includes the ones ranked below it, and you can change calibration in the Console at any time.

Need more websites, or a calibration made for your organization? Talk to us.

For careful buyers

Motion, speed and data, in plain terms

Reduced motion

When a visitor’s device asks for reduced motion, Sylvius stops its animation and shows a still frame. If the visitor changes the setting, Sylvius follows it.

Page speed

The tag loads asynchronously and does not hold up your page. The runtime is about 30 KB compressed, and our build fails if it grows past that. If our servers can’t be reached, your page loads as normal, without Sylvius.

Visitor data

Sylvius sets no cookies. It keeps a random visitor ID in the browser’s local storage. It records time on the page, scroll depth, pages viewed in the visit, how many times the visitor clicked, whether they interacted, and conversions you track. It never records what was clicked, page addresses, page content or form values.

Privacy signals

Visitors whose browsers send Global Privacy Control or Do Not Track get no ID and are never measured. You can give visitors an opt-out, after which Sylvius makes no requests for them. Measurements are deleted after 400 days; a test that is still running keeps its own until it ends.

Your domain only

Sylvius serves a site only on the domain you verified, so a copied key shows nothing anywhere else.

Read the privacy policy and the terms of service.

What we believe

Persuasion without pressure

A good website earns attention. It does not trap it. Sylvius adds no pop-ups, countdown timers or tricks to your site, and this page uses none either.

See it on your own site

From $99 a month.

Get started

Agencies and brands with several locations: talk to us.