Quick answer

OneTrust is the incumbent for large enterprises with existing GRC suites. TrustArc is strongest on GDPR/global privacy specifically. GeraCompliance is the newer, AI-Act-native option designed for mid-market and technical teams. Pick by org size, existing tooling, and how AI-heavy your stack is.

Side-by-side

Feature	OneTrust	TrustArc	GeraCompliance
EU AI Act Annex III classifier	Yes	Yes	Yes
Live AI system inventory	Yes	Partial	Yes
FRIA templates	Yes	Yes	Yes
GPAI vendor questionnaires	Yes	Partial	Yes
Bias testing integration	Add-on	Add-on	Included
Starting price/year	$40k+	$25k+	£3,500/yr
Implementation time	3-6 months	2-4 months	2-4 weeks

OneTrust — enterprise default

OneTrust is the incumbent. Used by a majority of Fortune 500 privacy teams. Deep GRC suite (privacy, security, ethics, third-party risk). Strong if you already have OneTrust — weak as a standalone AI compliance choice because of implementation cost and complexity.

TrustArc — global privacy specialist

TrustArc (formerly TRUSTe) is strongest on cross-border privacy: GDPR, CCPA, LGPD, PIPL. AI Act support is solid but layered onto the privacy core. Best for organisations whose primary risk is privacy, with AI as a secondary concern.

GeraCompliance — AI-Act-native

GeraCompliance was built post-EU AI Act. Annex III-centric, bias testing and incident management included, priced for mid-market. Best for 50–2,000 employee organisations without existing enterprise GRC investments. Ships with GeraServices ecosystem integrations (GeraJobs AI hiring, GeraGuard consumer privacy).

Who should pick which

Enterprise >5,000 employees with existing OneTrust: stay on OneTrust, add AI Act module.
Global B2C with primary privacy risk: TrustArc.
Mid-market 50–2,000 employees, AI-heavy stack: GeraCompliance.
Tech-first startup <50 employees: GeraCompliance on the starter tier, graduate as you grow.