Do Osano and Usercentrics both support IAB TCF?

Both document it. Statuses come from vendor docs.

Do Osano and Usercentrics block trackers before consent?

Osano failed 2 of 4 checks: the accept check failed and the reject check failed. Usercentrics failed none. 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.

Osano vs Usercentrics: cookie banner speed and features compared

Results forFramework

On emulated mobile, Osano showed its banner sooner, in a median 2.15 s against 4.16 s for Usercentrics. Osano delayed the main content 420 ms less. Osano failed 2 of 4 checks: the accept check failed and the reject check failed. Usercentrics failed none. Per vendor docs, only Osano offers open-source code.

OsanoOsano

Osano Tested: Hosted
All Osano results

UsercentricsUsercentrics

Usercentrics Tested: Hosted
All Usercentrics results

Which is faster, Osano or Usercentrics?

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

Osano and Usercentrics on the mobile (emulated) profile, Next.js 16
Question	Osano	Usercentrics	Difference
Banner appearsTime from navigation until the banner is visible on screen. Lower is better.	2.15 sFast	4.16 sSlow	Osano’s banner appeared 2.01 s sooner.
Page slowed byExtra time before the main content paints (LCP), compared with the same page without a consent manager.	+424 ms95% interval 420 ms to 428 msSmall	+844 ms95% interval 836 ms to 864 msNoticeable	Osano delayed the main content 420 ms less.
Click responds inTime from pressing Accept until the screen updates. Under 200 ms feels instant.	128 msOne visit measuredFast		No comparison. Usercentrics has no result here, so we call neither one better.
Blocks trackersChecks that no tracker runs, the page sets no cookie and no data leaves the page before the visitor chooses.	2 of 4 checks passed2 failed: the accept check failed, the reject check failedLeaked	4 of 4 checks passedBlocked	Osano failed 2 of 4 checks: the accept check failed and the reject check failed. Usercentrics failed none.
Adds to pageExtra data transferred during the first load, compared with the same page without a consent manager.	+85 KB95% interval: 85 KBLight	+164 KB95% interval: 164 KBModerate	Osano added 79 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 mobile profile. Both CMPs ran on Next.js 16.

Page vitalsChange against the same page without a consent manager.
Metric	Osano	Usercentrics
TTFB	No measurable delaypage 5 ms	No measurable delaypage 7 ms
FCP	No measurable delaypage 248 ms	No measurable delaypage 252 ms
LCP	+424 mspage 3.87 s	+844 mspage 4.30 s
CLS	No measurable shiftpage 0.00	No measurable shiftpage 0.00

Load timesMilliseconds from navigation.
Metric	Osano	Usercentrics
CMP script requested
CMP script loaded
Consent state known
Banner visible	2.15 s	4.16 s

After AcceptMilliseconds from the click.
Metric	Osano	Usercentrics
Screen responds	128 ms
Banner gone
Consent applied
Analytics active

Which features differ between Osano and Usercentrics?

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 Osano and Usercentrics, from vendor docs
Feature	OsanoOsano	UsercentricsUsercentrics
Only Osano · 1
Open sourceDeveloper	Older library only (vendor documentation, opens in a new tab)	Commercial licence (vendor documentation, opens in a new tab)
Not confirmed for one side · 1
Headless UIDeveloper	Unknown	Per vendor docs (vendor documentation, opens in a new tab)

Same on both · 14

Features with the same status for Osano and Usercentrics
Feature	OsanoOsano	UsercentricsUsercentrics
IAB TCFStandards	TCF v2 (vendor documentation, opens in a new tab)	Pro plan and up (vendor documentation, opens in a new tab)
IAB GPPStandards	Per vendor docs (vendor documentation, opens in a new tab)	v3 script tag (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)	Per vendor docs (vendor documentation, opens in a new tab)
Geo-targeted bannersCompliance	Per vendor docs (vendor documentation, opens in a new tab)	Plus plan and up (vendor documentation, opens in a new tab)
Script blockingCompliance	Paid plans (vendor documentation, opens in a new tab)	Paid plans (vendor documentation, opens in a new tab)
Consent recordsCompliance	Paid plans (vendor documentation, opens in a new tab)	Kept 12 months (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)
Self-hostableDeveloper	Hosted script (vendor documentation, opens in a new tab)	Hosted backend (vendor documentation, opens in a new tab)
TypeScript typesDeveloper	React Native SDK only (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Free tierPricing	About 5,000 pageviews a month (vendor documentation, opens in a new tab)	1,000 sessions 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)