Do Usercentrics and CookieYes both support IAB TCF?

Both document it. Statuses come from vendor docs.

Do Usercentrics and CookieYes block trackers before consent?

Neither leaked a tracker in the checks that ran. We could not run 1 of 4 checks for CookieYes. Each check loads the page. Then it looks for trackers that ran, cookies that the page set or data that left the page before the visitor chose.

Usercentrics vs CookieYes: cookie banner speed and features compared

Results forFramework

On desktop, CookieYes showed its banner sooner, in a median 387 ms against 672 ms for Usercentrics. Neither added a measurable delay. Neither leaked a tracker in the checks that ran. We could not run 1 of 4 checks for CookieYes. Their documented features are the same in this comparison.

UsercentricsUsercentrics

Usercentrics Tested: Hosted
All Usercentrics results

CookieYesCookieYes

CookieYes Tested: Hosted
All CookieYes results

Which is faster, Usercentrics or CookieYes?

Shorter bars are better. The exception is tracker blocking, where the bar shows the share of checks passed.

Usercentrics and CookieYes on the desktop profile, Next.js 16
Question	Usercentrics	CookieYes	Difference
Banner appearsTime from navigation until the banner is visible on screen. Lower is better.	672 msModerate	387 msModerate	CookieYes’ banner appeared 284 ms sooner.
Page slowed byExtra time before the main content paints (LCP), compared with the same page without a consent manager.	No measurable delay95% interval −16 ms to 16 msNone	No measurable delay95% interval −12 ms to 24 msNone	Neither added a measurable delay.
Click responds inTime from pressing Accept until the screen updates. Under 200 ms feels instant.	16 msOne visit measuredFast	16 msOne visit measuredFast	About the same. They are less than 16 ms apart.
Blocks trackersChecks that no tracker runs, the page sets no cookie and no data leaves the page before the visitor chooses.	4 of 4 checks passedBlocked	3 of 4 checks passed1 could not be checkedPartly checked	Neither leaked a tracker in the checks that ran. We could not run 1 of 4 checks for CookieYes.
Adds to pageExtra data transferred during the first load, compared with the same page without a consent manager.	+164 KB95% interval: 164 KBModerate	+31 KB95% interval: 31 KBLight	CookieYes added 133 KB less to the first load.

“About the same” means that the two results fall within each other’s spread. We measure both against the same page without a consent manager. We do not publish a direct head-to-head interval yet.

Page vitals and load times

Lab detail for engineers. All values are medians on the desktop profile. Both CMPs ran on Next.js 16.

Page vitalsChange against the same page without a consent manager.
Metric	Usercentrics	CookieYes
TTFB	No measurable delaypage 5 ms	No measurable delaypage 8 ms
FCP	No measurable delaypage 64 ms	No measurable delaypage 64 ms
LCP	No measurable delaypage 120 ms	No measurable delaypage 132 ms
CLS	No measurable shiftpage 0.00	No measurable shiftpage 0.00

Load timesMilliseconds from navigation.
Metric	Usercentrics	CookieYes
CMP script requested
CMP script loaded
Consent state known
Banner visible	672 ms	387 ms

After AcceptMilliseconds from the click.
Metric	Usercentrics	CookieYes
Screen responds	16 ms	16 ms
Banner gone
Consent applied
Analytics active

Which features differ between Usercentrics and CookieYes?

Statuses come from each vendor’s documentation. Each status links to its source.

Verified by test
Per vendor docs
Partial
Not supported
Unknown

Features that differ between Usercentrics and CookieYes, from vendor docs
Feature	UsercentricsUsercentrics	CookieYesCookieYes
Not confirmed for one side · 4
IAB GPPStandards	v3 script tag (vendor documentation, opens in a new tab)	Unknown
Self-hostableDeveloper	Hosted backend (vendor documentation, opens in a new tab)	Unknown
Headless UIDeveloper	Per vendor docs (vendor documentation, opens in a new tab)	Unknown
TypeScript typesDeveloper	Per vendor docs (vendor documentation, opens in a new tab)	Unknown

Same on both · 12

Features with the same status for Usercentrics and CookieYes
Feature	UsercentricsUsercentrics	CookieYesCookieYes
IAB TCFStandards	Pro plan and up (vendor documentation, opens in a new tab)	Pro and Ultimate plans (vendor documentation, opens in a new tab)
Google Consent Mode v2Standards	Per vendor docs (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Google-certified CMPStandards	Per vendor docs (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Global Privacy ControlStandards	Per vendor docs (vendor documentation, opens in a new tab)	Pro and Ultimate plans (vendor documentation, opens in a new tab)
Geo-targeted bannersCompliance	Plus plan and up (vendor documentation, opens in a new tab)	Pro and Ultimate plans (vendor documentation, opens in a new tab)
Script blockingCompliance	Paid plans (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Consent recordsCompliance	Kept 12 months (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Cookie scanningCompliance	Per vendor docs (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Open sourceDeveloper	Commercial licence (vendor documentation, opens in a new tab)	Proprietary (vendor documentation, opens in a new tab)
Free tierPricing	1,000 sessions a month (vendor documentation, opens in a new tab)	5,000 pageviews a month (vendor documentation, opens in a new tab)
Script tagFrameworks	Per vendor docs (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
First-party SDKsReact, Next.js, Vue, Nuxt, Svelte, SvelteKit, Astro, TanStack Start	Script tag only (vendor documentation, opens in a new tab)	Script tag only (vendor documentation, opens in a new tab)