Unbounce

Overview

Unbounce is a landing page builder and conversion optimization platform that enables marketers to create, publish, and A/B test landing pages without developer involvement. Its Smart Builder and Classic Builder produce landing pages hosted on Unbounce's infrastructure or custom domains, and its conversion intelligence features use machine learning to optimize traffic routing across variants. Unbounce is widely used for paid search and paid social campaigns (Google Ads, Meta Ads) where dedicated landing pages improve Quality Score and conversion rates. Customers include marketing agencies, SaaS companies, and e-commerce brands running performance campaigns.

What This Script Does

On Unbounce-hosted landing pages, the Unbounce script is the foundational rendering engine — it is responsible for building and displaying the page itself, not merely an analytics or tracking layer.

Script loading:

• Core Unbounce runtime loads from unbouncepages.com or the publisher's custom domain CDN
• Page assets (images, fonts, CSS) load from Unbounce's CDN (d9hhrg4mnvzow.cloudfront.net or similar CloudFront distribution)
• JavaScript libraries configured by the page builder (e.g., jQuery, form validation) are bundled with the page

A/B test variant delivery:

• On page load, the Unbounce script evaluates which A/B test variant to serve to the visitor
• Variant assignment is stored in a cookie to ensure consistent experience across visits
• Variant assignment events are reported to Unbounce's analytics platform for conversion rate tracking

Cookies set:

• ubvs — first-party persistent cookie, 5-year expiry, stores the visitor's A/B test variant assignment to ensure consistent experience across visits
• ubvt — first-party persistent cookie, stores visitor identifier for unique visitor deduplication in conversion reporting
• ubpv — tracks whether the visitor is a first-time or returning visitor to the page
• Form state cookies (session duration) that persist partial form data during the current visit
• Third-party integration cookies may be set if the page owner has configured tools like Google Analytics, Meta Pixel, or HubSpot via Unbounce's script manager

Conversion tracking:

• Form submission events are fired to Unbounce's servers with: form field values (name, email, phone, etc.), page variant, and session context
• These events populate the Unbounce conversion dashboard and inform Smart Traffic's ML optimization model
• Webhook integrations can transmit form data to CRMs and marketing automation platforms in real time

Form data handling:

• All form submissions are stored in Unbounce's lead database, accessible to the page owner
• Unbounce does not use form submission data for its own marketing or third-party advertising purposes

Consent & Compliance

Unbounce falls under functional and analytics consent categories, with the balance depending on usage context. When Unbounce is serving the landing page itself (page rendering, form functionality, form submission processing), it is functional infrastructure — blocking it would break the page entirely. The A/B testing cookies (ubvs, ubvt) serve both functional purposes (consistent variant delivery) and analytics purposes (conversion rate measurement), creating a blended classification.

Under GDPR and ePrivacy, the A/B test persistent cookies require evaluation: ubvs with a 5-year expiry and ubvt for visitor deduplication are non-essential under a strict reading of the ePrivacy Directive. The functional argument (consistent page experience) competes with the analytics use (unique visitor counting for CRO reporting). Many implementations treat these as functional given the page rendering dependency.

Under CCPA/CPRA, form submission data collected via Unbounce pages constitutes personal information whose handling depends on the page owner's configured integrations and data flow.

Should You Block This Without Consent?

Conditional. If Unbounce is serving the landing page itself, blocking it would break the page entirely — not a viable option. A/B testing and conversion tracking components may require consent for the persistent visitor cookies. Evaluate based on whether the Unbounce script is the page rendering engine (functional, cannot block) or an optimization layer added to an existing page (analytics, requires consent for tracking cookies).