In this guide:
- What OneTrust is built for
- The five-capability comparison
- The practical decision
The short answer: OneTrust is the dominant enterprise privacy platform. PieEye was built specifically for CIPA compliance. For organizations whose primary concern is CIPA demand letter protection, the distinction comes down to whether CIPA-adequate configuration requires weeks of custom engineering on top of the platform or whether it is the platform's default behavior.
What OneTrust is built for
OneTrust is the market-leading enterprise privacy management platform designed to be a comprehensive privacy operations system — consent management, DSAR workflows, data mapping, vendor risk management, policy management, assessments — across dozens of global regulations simultaneously.
OneTrust's November 2025 Compliance Assistant feature added CIPA-specific scanning, checking banner behavior, consent signal enforcement, and Google Consent Mode tag timing. This is a meaningful addition that signals OneTrust is taking CIPA seriously.
The GTM integration exists and supports Consent Mode v2. GPC signal configuration is available. Server-side consent records are accessible. Available is not the same as default. OneTrust typically requires consultation phases, setup meetings, and custom workflow configuration extending deployment timelines significantly. CIPA-adequate configuration — default-denied states, correct script loading sequence, GPC at initialization — requires engineering work beyond the standard setup.
A further consideration: OneTrust raised its minimum ACV to approximately $10,000 per year as of early 2026. For mid-size DTC brands, e-commerce companies, and SaaS businesses — the primary targets of CIPA demand letters — this pricing tier is above what the compliance problem requires.
The five-capability comparison
Capability 1: Pre-consent blocking
OneTrust: Can be configured to block tracking before consent. In the standard implementation, GTM default-denied states must be separately configured. A standard OneTrust deployment on a new GTM container does not produce default-denied consent states out of the box.
PieEye: GTM integration implements Consent Mode v2 default-denied states as part of deployment, not as a post-deployment configuration task.
Capability 2: GPC detection
OneTrust: Supports GPC. Implementation as a pre-initialization signal requires specific configuration that is not standard. Compliance Assistant can identify GPC failures. Identifying a failure and preventing it are different capabilities.
PieEye: Implements GPC detection at CMP initialization by default, before the banner renders.
Capability 3: Server-side consent records
OneTrust: Generates consent records available in the dashboard. Compliance Assistant retains 12 months of scan results. For CIPA demand letters covering events potentially 2–3 years prior, 12 months of scan results is different from multi-year server-side consent event records queryable by date range.
PieEye: Generates server-side consent records retained for three years by default, queryable by date range without engineering involvement.
Capability 4: TMS integration depth
OneTrust: GTM integration works. Requires manual Consent Mode v2 configuration and explicit default state setup. Without that additional configuration, signals are passed but GTM must be separately configured to enforce them.
PieEye: GTM integration includes native default state configuration as part of deployment, with correct failure behavior in degraded conditions.
Capability 5: Server-side consent enforcement
Client-side consent enforcement has inherent reliability limitations. Browser extensions, ad blockers, JavaScript errors, and race conditions can all produce situations where client-side enforcement fails silently and tracking fires for users who should be blocked. For high-traffic sites and complex MarTech stacks, server-side enforcement through a consent proxy provides the reliability that client-side enforcement cannot guarantee — intercepting outbound tracking requests at the network level and evaluating consent state independently of what happened in the browser.
OneTrust: Does not offer a server-side consent proxy architecture as a standard product feature. Enforcement is client-side only.
PieEye: PieEye's server-side consent enforcement layer is currently in development. Design partners who want early access to server-side enforcement as part of their CIPA compliance architecture can join the waitlist at pii.ai. Client-side enforcement — covering pre-consent blocking, GPC detection, TMS integration, and server-side consent records — is available in the current platform.
The practical decision
If your organization needs a comprehensive enterprise privacy platform — DSAR workflows, data mapping, vendor risk, multi-jurisdictional policy management, and CIPA compliance as one component of a larger program — OneTrust is the market leader and can be configured for CIPA adequacy with the right engineering investment.
If your primary need is CIPA compliance for your website tracking stack — and the broader enterprise privacy suite is not a priority — PieEye provides the four current capabilities (pre-consent blocking, GPC detection, server-side consent records, TMS integration depth) in their correct default configuration at a price point appropriate for mid-size DTC brands, e-commerce companies, and SaaS businesses.
The infrastructure answer
The free PieEye compliance scan confirms exactly what your current implementation is missing before you commit to either platform.
Run a free PieEye compliance scan — it takes minutes, requires no code changes to initiate, and tells you exactly what a plaintiffs' attorney's scanning tool would find if it looked at your website today.
For the complete technical architecture required to build a CIPA-compliant consent implementation, the best CMP for CIPA compliance guide and CIPA compliance guide cover the evaluation framework and implementation in detail.