CMP Comparison 2026: UniConsent vs Usercentrics vs Cookiebot vs Didomi vs OneTrust

The most reliable way to choose a consent management platform is to verify claims against official registries. This comparison covers UniConsent, Usercentrics, Cookiebot, CookieYes, Didomi, and OneTrust across the criteria that actually decide a purchase, and every certification claim below can be checked on an official registry.

How to Verify Any CMP's Claims

Three public registries settle most questions:

• IAB Europe CMP list: only CMPs that completed IAB Europe's validation are listed, each with a CMP ID. UniConsent is CMP ID 68; Usercentrics is 5, Didomi 7, OneTrust 28, Cookiebot 134, CookieYes 401.
• IAB TCF Canada CMP list: separate registration for Canada. Of the six, only UniConsent and OneTrust are currently listed.
• Google's certified CMP partner list: required for serving ads with Google Ad Manager, AdSense, and AdMob in the EEA and UK. All six are listed.

Where the Platforms Differ

Free plans. UniConsent's free tier covers up to 50,000 users/month. Usercentrics' free tier covers 1,000 sessions/month, CookieYes 5,000 pageviews/month, Cookiebot one domain limited to 50 subpages. Didomi and OneTrust have no free plan.

Pricing transparency. UniConsent, Usercentrics, Cookiebot, and CookieYes publish prices and offer self-service signup. Didomi and OneTrust price by custom quote.

Mobile SDKs. UniConsent, Usercentrics, Didomi, and OneTrust ship iOS, Android, Flutter, and React Native SDKs. Cookiebot and CookieYes are web-only.

Microsoft UET Consent Mode. UniConsent, Usercentrics, Cookiebot, CookieYes, and Didomi document support. OneTrust publishes no official UET consent mode documentation.

IAB GPP. UniConsent, Usercentrics, Didomi, and OneTrust support the Global Privacy Platform for US state laws. Cookiebot and CookieYes do not document GPP support.

Multi-site pricing. UniConsent bundles up to 20 sites in one plan; Usercentrics, Cookiebot, and CookieYes price per domain.

Enterprise support. Didomi and OneTrust serve enterprise customers through custom-quote engagements. UniConsent covers both ends of the market: self-service plans from £20/mo, and an Enterprise plan with unlimited websites, an SLA with 24/7 premium support, migration support from any CMP, and hands-on integration service.

The Full Table

See the complete side-by-side comparison, covering 18 verifiable criteria across all six platforms with a last-verified date, on our CMP comparison page, with detailed pages for Usercentrics, Cookiebot, Didomi, OneTrust, and CookieYes.