Do iubenda and Usercentrics both support IAB TCF?

Both document it. Statuses come from vendor docs.

Do iubenda and Usercentrics block trackers before consent?

Both held trackers back in every check. 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.

iubenda vs Usercentrics: cookie banner speed and features compared

Results forFramework

On emulated mobile, iubenda showed its banner sooner, in a median 2.66 s against 4.16 s for Usercentrics. iubenda delayed the main content 232 ms less. Both held trackers back in every check. Their documented features are the same in this comparison.

iubendaiubenda

iubenda Tested: Hosted
All iubenda results

UsercentricsUsercentrics

Usercentrics Tested: Hosted
All Usercentrics results

Which is faster, iubenda or Usercentrics?

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

iubenda and Usercentrics on the mobile (emulated) profile, Next.js 16
Question	iubenda	Usercentrics	Difference
Banner appearsTime from navigation until the banner is visible on screen. Lower is better.	2.66 sModerate	4.16 sSlow	iubenda’s banner appeared 1.49 s sooner.
Page slowed byExtra time before the main content paints (LCP), compared with the same page without a consent manager.	+612 ms95% interval 600 ms to 624 msNoticeable	+844 ms95% interval 836 ms to 864 msNoticeable	iubenda delayed the main content 232 ms less.
Click responds inTime from pressing Accept until the screen updates. Under 200 ms feels instant.	32 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.	4 of 4 checks passedBlocked	4 of 4 checks passedBlocked	Both held trackers back in every check.
Adds to pageExtra data transferred during the first load, compared with the same page without a consent manager.	+122 KB95% interval: 122 KBModerate	+164 KB95% interval: 164 KBModerate	iubenda added 43 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 We do not publish a direct head-to-head interval yet.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	iubenda	Usercentrics
TTFB	No measurable delaypage 6 ms	No measurable delaypage 7 ms
FCP	No measurable delaypage 252 ms	No measurable delaypage 252 ms
LCP	+612 mspage 4.06 s	+844 mspage 4.30 s
CLS	No measurable shiftpage 0.00	No measurable shiftpage 0.00

Load timesMilliseconds from navigation.
Metric	iubenda	Usercentrics
CMP script requested
CMP script loaded
Consent state known
Banner visible	2.66 s	4.16 s

After AcceptMilliseconds from the click.
Metric	iubenda	Usercentrics
Screen responds	32 ms
Banner gone
Consent applied
Analytics active

Which features differ between iubenda 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 iubenda and Usercentrics, from vendor docs
Feature	iubendaiubenda	UsercentricsUsercentrics
Not confirmed for one side · 1
TypeScript typesDeveloper	Unknown	Per vendor docs (vendor documentation, opens in a new tab)

Same on both · 15

Should you choose iubenda or Usercentrics?

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

Choose iubenda if

A fast banner matters to you: iubenda’s banner appeared 1.49 s sooner
Page load time matters to you: iubenda delayed the main content 232 ms less
Page weight matters to you: iubenda added 43 KB less to the first load

Choose Usercentrics if

Nothing measured or documented here favours Usercentrics. Decide on price, support and the tools that you already use

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 iubenda and Usercentrics

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

Report a correction

On the emulated mobile profile, iubenda’s banner appeared in a median 2.66 s and Usercentrics’ in 4.16 s. iubenda delayed the main content 232 ms less.

All comparisons

Feature	iubendaiubenda	UsercentricsUsercentrics
IAB TCFStandards	TCF v2.2 (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	Advanced and Ultimate plans (vendor documentation, opens in a new tab)	Plus plan and up (vendor documentation, opens in a new tab)
Script blockingCompliance	Per vendor docs (vendor documentation, opens in a new tab)	Paid plans (vendor documentation, opens in a new tab)
Consent recordsCompliance	Per vendor docs (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)
Open sourceDeveloper	Hosted embed only (vendor documentation, opens in a new tab)	Commercial licence (vendor documentation, opens in a new tab)
Self-hostableDeveloper	Hosted embed only (vendor documentation, opens in a new tab)	Hosted backend (vendor documentation, opens in a new tab)
Headless UIDeveloper	Experimental (vendor documentation, opens in a new tab)	Per vendor docs (vendor documentation, opens in a new tab)
Free tierPricing	Under 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)