Do Ketch and CookieYes both support IAB TCF?

Both document it. Statuses come from vendor docs.

Do Ketch 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.

Ketch vs CookieYes: cookie banner speed and features compared

Results forFramework

On desktop, CookieYes showed its banner sooner, in a median 387 ms against 1.68 s for Ketch. Ketch delayed the main content by 0 ms. CookieYes added no measurable delay. Neither leaked a tracker in the checks that ran. We could not run 1 of 4 checks for CookieYes. Per vendor docs, only Ketch offers open-source code.

KetchKetch

Ketch Tested: Hosted
All Ketch results

CookieYesCookieYes

CookieYes Tested: Hosted
All CookieYes results

Which is faster, Ketch or CookieYes?

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

Ketch and CookieYes on the desktop profile, Next.js 16
Question	Ketch	CookieYes	Difference
Banner appearsTime from navigation until the banner is visible on screen. Lower is better.	1.68 sSlow	387 msModerate	CookieYes’ banner appeared 1.29 s sooner.
Page slowed byExtra time before the main content paints (LCP), compared with the same page without a consent manager.	0 msSmall	No measurable delay95% interval −12 ms to 24 msNone	Ketch delayed the main content by 0 ms. CookieYes added no measurable delay.
Click responds inTime from pressing Accept until the screen updates. Under 200 ms feels instant.	40 msOne visit measuredFast	16 msOne visit measuredFast	CookieYes responded 24 ms sooner. Both are under 200 ms, which feels instant.
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.	+532 KBHeavy	+31 KB95% interval: 31 KBLight	CookieYes added 501 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 We do not publish a direct head-to-head interval yet.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	Ketch	CookieYes
TTFB	0 mspage 5 ms	No measurable delaypage 8 ms
FCP	−4 mspage 60 ms	No measurable delaypage 64 ms
LCP	0 mspage 116 ms	No measurable delaypage 132 ms
CLS	No measurable shiftpage 0.00	No measurable shiftpage 0.00

Load timesMilliseconds from navigation.
Metric	Ketch	CookieYes
CMP script requested
CMP script loaded
Consent state known
Banner visible	1.68 s	387 ms

After AcceptMilliseconds from the click.
Metric	Ketch	CookieYes
Screen responds	40 ms	16 ms
Banner gone
Consent applied
Analytics active

Which features differ between Ketch 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 Ketch and CookieYes, from vendor docs
Feature	KetchKetch	CookieYesCookieYes
Only Ketch · 1
Open sourceDeveloper	SDKs and samples only (vendor documentation, opens in a new tab)	Proprietary (vendor documentation, opens in a new tab)
Not confirmed for one side · 4
IAB GPPStandards	Per vendor docs (vendor documentation, opens in a new tab)	Unknown
Self-hostableDeveloper	Hosted service (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 · 11

Features with the same status for Ketch and CookieYes
Feature	KetchKetch	CookieYesCookieYes
IAB TCFStandards	TCF v2.2 (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	Per vendor docs (vendor documentation, opens in a new tab)	Pro and Ultimate plans (vendor documentation, opens in a new tab)
Script blockingCompliance	Tag orchestration (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Consent recordsCompliance	Per vendor docs (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)
Free tierPricing	5,000 users (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)

Should you choose Ketch or CookieYes?

We built these lists from the measured and documented differences above. Neither list is a recommendation.

Choose Ketch if

You want open-source code

Choose CookieYes if

A fast banner matters to you: CookieYes’ banner appeared 1.29 s sooner
Page load time matters to you: Ketch delayed the main content by 0 ms. CookieYes added no measurable delay
Page weight matters to you: CookieYes added 501 KB less to the first load

What was tested?

Deployment: Both ran from their vendor-hosted services. Network distance to each vendor is part of the result.

How we test: methodology cookiebench-v3.2.4

Questions about Ketch and CookieYes

Answers come from the benchmark run and from each vendor’s documentation.

Report a correction

On the desktop profile, CookieYes’ banner appeared in a median 387 ms and Ketch’s in 1.68 s. Ketch delayed the main content by 0 ms. CookieYes added no measurable delay.