CDN

LiteSpeed Cache

LiteSpeed Cache for WordPress (LSCWP) is a popular free performance plugin developed by LiteSpeed Technologies. It works in tandem with LiteSpeed/OpenLiteSpeed web servers to deliver server-level full-page caching, browser cache headers, database cleanup, lazy loading, and front-end optimisation (CSS/JS minification, critical CSS). LiteSpeed Cache itself does not transfer visitor data; optional QUIC.cloud services for CDN, image optimisation, and critical CSS introduce remote processing on US infrastructure.

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Overview

What does LiteSpeed Cache do?

What LiteSpeed Cache is

LiteSpeed Cache for WordPress (LSCWP) is a free performance plugin developed by LiteSpeed Technologies Inc. (Houston, Texas). When paired with a LiteSpeed Web Server or OpenLiteSpeed, the plugin enables server-level full-page caching, ESI block caching, browser cache headers, database optimisation, lazy loading, and front-end asset optimisation. It is the most widely used cache plugin in the WordPress ecosystem after WP Rocket.

What data LiteSpeed Cache processes

On the server: cached HTML pages, ESI fragments, and the cache vary keys (typically based on cookies for logged-in users). On the client: a small functional cookie or absence-of-cookie marker used by the cache to differentiate logged-in users from anonymous visitors. The optional QUIC.cloud services receive asset URLs and (for some features) page HTML content; opt-in usage analytics for the plugin itself report aggregated WordPress and plugin version stats.

GDPR and ePrivacy implications

The cache logic itself is a technical necessity and qualifies as legitimate interest under Art. 6(1)(f). The cache-bypass cookies are functional and exempt from consent. The QUIC.cloud optional services are subprocessor relationships: the publisher (controller) must document them in the RoPA and ensure the asset URLs do not leak personal data via path or query parameters.

International data transfers

None for the core plugin (runs on the WordPress host). QUIC.cloud services are operated by LiteSpeed Technologies from the US with global edge presence; transfers from the EU rely on the QUIC.cloud DPA and Standard Contractual Clauses. The image optimisation feature also sends original images to QUIC.cloud for processing, which can be a transfer trigger if the images contain personal data.

Practical compliance steps

Run LiteSpeed Cache locally without QUIC.cloud if you want zero third-country transfer; if you do enable QUIC.cloud, sign the DPA and document the SCCs, configure image optimisation to skip user-uploaded sensitive images, document LiteSpeed Cache in your RoPA as both a legitimate-interest processor (core) and a US subprocessor (QUIC.cloud), and exclude personal-data-rich pages from caching.

Compliance

LiteSpeed Cache and the GDPR

Legal basis: Legitimate interest (Art. 6(1)(f) GDPR) for caching and performance optimisation as a necessary technical activity; functional cookies for cache-bypass purposes
Risk level: low
Applicable regulations: GDPR, ePrivacy Directive, CCPA

Impact assessment (DPIA)

LiteSpeed Cache mainly operates on the cached HTML response and on backend cache invalidation. Key DPIA considerations: (1) cache bypass cookies (e.g., for logged-in users) are functional and tied to the cache logic; (2) caching authenticated pages with personal data must be carefully configured to avoid cross-user leaks (the plugin handles this through cache vary rules); (3) the optional QUIC.cloud services for CDN, image optimisation, low-quality image placeholder, and critical CSS generation send asset URLs (and sometimes HTML) to US infrastructure; (4) the bundled Cloudflare API integration manages purges via Cloudflare account credentials; (5) usage analytics for the plugin itself (opt-in) report aggregated statistics back to LiteSpeed.

Sample text for your banner

Our WordPress site uses LiteSpeed Cache to deliver faster pages. The plugin runs on our server and caches full HTML pages, with cache-bypass logic for logged-in users. Some optional features (QUIC.cloud CDN, image optimisation, critical CSS generation) transfer asset URLs to LiteSpeed Technologies infrastructure in the United States; transfers rely on Standard Contractual Clauses. No marketing or analytics cookies are set by LiteSpeed Cache.

Cookies and trackers

What LiteSpeed Cache sets and contacts

Tracking method: WordPress plugin (PHP server-side) that integrates with LiteSpeed/OpenLiteSpeed web servers; optional QUIC.cloud CDN and image optimisation service
Server location: Self-hosted (the LiteSpeed Cache plugin runs on the WordPress site). Vendor LiteSpeed Technologies Inc. is based in Houston, Texas. The optional QUIC.cloud CDN and image optimisation service operate global PoPs.
Cookieless mode available: Yes
Data transferred outside the EU: The LiteSpeed Cache plugin itself does not transfer visitor data. The optional QUIC.cloud services (CDN, image optimisation, low-quality image placeholder, critical CSS generation, page optimisation) send asset URLs and sometimes the full page HTML to QUIC.cloud servers (United States) for processing. International transfers rely on the QUIC.cloud DPA and Standard Contractual Clauses under Art. 46(2)(c) GDPR.

Cookies set (3)

Name	Type	Duration	Purpose
_lscache_vary	Functional / Cache	Session	Used by the LiteSpeed Cache layer to compute the cache vary key for the current visitor (e.g., logged-in vs anonymous) so the correct cached page is served.
litespeed_role	Functional / Cache	Session	Differentiates cache versions based on the WordPress user role, ensuring administrators and editors get the appropriate uncached experience.
litespeed_url_vary	Functional / Cache	Session	Stores additional cache key data when the publisher has configured custom cache vary rules (currency, language, region).

Third-party domains contacted (5)

litespeedtech.com
www.litespeedtech.com
quic.cloud
api.quic.cloud
cdn.quic.cloud

Questions

Frequently asked questions about LiteSpeed Cache

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What cookies does LiteSpeed Cache set?

LiteSpeed Cache may set a functional cookie used by the cache layer to determine whether the visitor should bypass the cache (typically because they are logged in or have a non-empty cart). The cookie name and behaviour depend on the cache vary configuration. No marketing or analytics cookies are set by the plugin itself.

Does LiteSpeed Cache require user consent?

No. The cache logic and cache-bypass cookies are functional and exempt under the strict service-delivery exemption of Art. 5(3) ePrivacy. The optional QUIC.cloud services are server-to-server and do not require user consent in themselves, but should be documented in the privacy notice as subprocessors.

What is the legal basis for using LiteSpeed Cache?

Legitimate interest (Art. 6(1)(f) GDPR) for the caching and optimisation activity as a necessary technical performance measure.

Does LiteSpeed Cache transfer data to the United States?

Not for the core plugin. The optional QUIC.cloud services (CDN, image optimisation, low-quality placeholder, critical CSS generation) are operated from the US and trigger transfers; signed DPA and SCCs apply.

Do I need a DPIA for LiteSpeed Cache?

No for the core plugin. If you enable QUIC.cloud image optimisation on user-uploaded media that may contain personal data (member photos, medical imagery), document a short DPIA covering the subprocessor relationship and the safeguards.

How do I implement LiteSpeed Cache compliantly?

Run LiteSpeed Cache locally without QUIC.cloud for zero third-country transfer; or sign the QUIC.cloud DPA and document SCCs; configure cache vary correctly to avoid leaking personal data across users; exclude authenticated and personal-data routes from caching; document LiteSpeed Cache in your RoPA.

What are the alternatives to LiteSpeed Cache?

Alternative WordPress cache and performance plugins include WP Rocket (France), W3 Total Cache (US, open source), Cache Enabler (Germany, free), Hyper Cache, WP Super Cache, NitroPack (Bulgaria), Borlabs Cache (Germany), and Autoptimize (Netherlands) for asset optimisation.

How do I update the cookie policy for LiteSpeed Cache?

Mention LiteSpeed Cache in the technical stack section of the privacy notice as a legitimate-interest caching processor. Add the cache-bypass cookie (if any) to the strictly-necessary section of the cookie policy. If QUIC.cloud is enabled, list it as a US subprocessor with SCCs.

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