Janus Gate
Simple integration guide
No statistics needed. Janus Gate tries different copy on your page, records what worked, and shows the stronger versions more often.
The main idea
What counts as a success?
Every visitor sees one version of your title, one CTA, and one line of text. Janus Gate then asks: did this visit go well? That answer is a success, a soft success, or a failure — nothing more complicated than that.
Full success — conversion (click)
The visitor clicks your target button (trial, signup, buy…). That is the main win. You mark that button in the HTML so Janus Gate knows which click counts.
Soft success — they engaged, but did not convert
No click on the target button, but they still showed interest:
- scrolled about halfway down the page (~50%), or
- stayed on the page for at least 15 seconds
Either one is enough. Soft successes help when real clicks are rare — the page still learns who is paying attention.
Failure — bounce
They leave quickly, barely scroll, and never click the target button. That visit does not count as a win for the versions they saw.
Over many visits, versions with more successes (and fewer failures) rise on the monitor and get shown more often. You do not need formulas — just watch the colors and the “% sure” numbers.
How to set it up
Three steps — then watch the numbers
Follow these once per landing. Your exact tracking ID, the <script> for <head>, and how to mark title / CTA / body are all on this page.
- 1
Create a project
Add a landing in the dashboard to get your private tracking ID.
Open dashboard - 2
Wire your page
Copy your tracking ID, paste the script in
Jump to your setup<head>, and mark title / CTA / body — see Your setup below. - 3
Start experiments
Open a project from your list. Variants already rotate after install — flip Start experiments on that project's monitor to record (paywall). Until then numbers stay at zero.
Open projects
How to read the colors on the monitor
- Green — best so far
- Yellow — leading
- Orange — in the race
- Red — behind
- Grey — too early
Before Janus Gate — a normal landing page
Here is a simple landing page — imagine it is yours. There are three elements Janus Gate will learn from:
- Title — the headline
- CTA button — the click that counts as a success
- Text below — the short line under the button
No Janus Gate yet — just static HTML.
<!DOCTYPE html>
<html>
<head>
<title>My Landing</title>
</head>
<body>
<h1>Stop guessing which headline converts</h1>
<button>Start Free Trial</button>
<p>Drop a snippet on your page and start learning.</p>
</body>
</html>The live demo at /example is the same idea, already wired so you can click around and watch the monitor.
What happens next
- A visitor opens your page.
- Janus Gate picks one variant for title, one for CTA, one for body.
- The same visitor keeps seeing the same choices (sticky session).
- Janus Gate records successes and failures for that visit (see below).
- Over time, better variants turn green on the monitor and get shown more often.
Soft success — a bit more detail
The main idea is at the top of this page. Here is only what “scroll ~50%” and “15 seconds” mean in practice.
What does “scroll ≥ 50%” mean?
It is not “50% of the people scrolled”. It means: this visitor has scrolled about halfway down your page.
Imagine the page is a long strip. The browser window is a smaller frame on that strip. As the visitor scrolls down, Janus Gate measures how far that frame has moved:
- 0% — still at the top (hero only).
- 50% — roughly in the middle of the page content.
- 100% — scrolled all the way to the bottom.
When that depth reaches 50%, we treat the visit as engaged (soft success), unless they already converted with a click (full success). On a very short page that fits entirely on screen, scroll depth is treated as already complete.
What does “stay ≥ 15 seconds” mean?
From the moment the page loads, Janus Gate starts a timer. If the visitor is still there after 15 seconds, that also counts as engaged (soft success) — even if they barely scrolled. Either scroll or time is enough.
How this shows up on the monitor
Title, CTA, and body each keep a simple scoreboard of successes and failures. After enough visits, the stronger version turns green (“Best so far”) — usually around 70%+ sure with enough views. That is the version Janus Gate starts showing more often.
Tip: try the wired-up demo at /example and watch results on /monitor. From your projects list, open a project and flip Start experiments (paywall) so visits update that monitor — the demo records automatically.