# OneTrust vs Usercentrics: cookie banner speed and features

On desktop, OneTrust and Usercentrics showed their banners in about the same time. The medians were 629 ms for OneTrust and 672 ms for Usercentrics. Neither added a measurable delay. Both held trackers back in every check. Per vendor docs, only OneTrust offers self-hosting. Per vendor docs, only Usercentrics offers a free tier.

We measured both in the same run, in a Next.js app. We measured each against the same page without a consent manager. They also share Script tag, React, Nuxt, Astro, TanStack Start integrations.

## Which is faster on desktop?

Desktop profile: 1365 × 768 · No CPU slowdown · 12.5 MB/s, no added latency.

| Question | OneTrust | Usercentrics | Difference |
| --- | --- | --- | --- |
| How fast does the banner appear? | 629 ms | 672 ms | About the same. The gap is under 20%, within run-to-run noise. |
| Does it slow the page down? | No measurable change | No measurable change | Neither added a measurable delay. |
| How fast does a click respond? | 24 ms | 16 ms | About the same. They are less than 16 ms apart. |
| Does it block trackers until consent? | 4 of 4 checks passed | 4 of 4 checks passed | Both held trackers back in every check. |
| How much does it add to the page? | +211 KB (95% interval: 211 KB) | +164 KB (95% interval: 164 KB) | Usercentrics added 47 KB less to the first load. |

## Which is faster on mobile?

Mobile (emulated) profile: 390 × 844, DPR 3 · Mid-tier phone CPU (4× slowdown) · 200 KB/s, 150 ms latency.

On emulated mobile, OneTrust and Usercentrics showed their banners in about the same time. The medians were 3.92 s for OneTrust and 4.16 s for Usercentrics. OneTrust delayed the main content 368 ms less. Both held trackers back in every check. Per vendor docs, only OneTrust offers self-hosting. Per vendor docs, only Usercentrics offers a free tier.

| Question | OneTrust | Usercentrics | Difference |
| --- | --- | --- | --- |
| How fast does the banner appear? | 3.92 s | 4.16 s | About the same. The gap is under 20%, within run-to-run noise. |
| Does it slow the page down? | +476 ms (95% interval 444 ms to 508 ms) | +844 ms (95% interval 836 ms to 864 ms) | OneTrust delayed the main content 368 ms less. |
| How fast does a click respond? | 16 ms | Under 16 ms | About the same. They are less than 16 ms apart. |
| Does it block trackers until consent? | 4 of 4 checks passed | 4 of 4 checks passed | Both held trackers back in every check. |
| How much does it add to the page? | +211 KB (95% interval: 211 KB) | +164 KB (95% interval: 164 KB) | Usercentrics added 47 KB less to the first load. |

## Which features differ?

| Feature | OneTrust | Usercentrics |
| --- | --- | --- |
| IAB TCF | Per vendor docs (TCF v2.2 and v2.3) | Per vendor docs (Pro plan and up) |
| IAB GPP | Per vendor docs | Per vendor docs (v3 script tag) |
| Google Consent Mode v2 | Per vendor docs | Per vendor docs |
| Google-certified CMP | Per vendor docs | Per vendor docs |
| Global Privacy Control | Per vendor docs | Per vendor docs |
| Geo-targeted banners | Per vendor docs | Per vendor docs (Plus plan and up) |
| Script blocking | Per vendor docs | Per vendor docs (Paid plans) |
| Consent records | Per vendor docs | Per vendor docs (Kept 12 months) |
| Cookie scanning | Per vendor docs | Per vendor docs |
| Open source | Not supported (Proprietary) | Not supported (Commercial licence) |
| Self-hostable | Partial (Script only; hosted backend) | Not supported (Hosted backend) |
| Headless UI | Partial (Mobile and CTV only) | Per vendor docs |
| TypeScript types | Unknown | Per vendor docs |
| Free tier | Not supported (Quote-based pricing) | Per vendor docs (1,000 sessions a month) |
| Script tag | Per vendor docs | Per vendor docs |
| React SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| Next.js SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| Vue SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| Nuxt SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| Svelte SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| SvelteKit SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| Astro SDK | Not supported (Script tag only) | Not supported (Script tag only) |
| TanStack Start SDK | Not supported (Script tag only) | Not supported (Script tag only) |

## Which should you choose?

### Choose OneTrust if

- You want self-hosting

### Choose Usercentrics if

- You want a free tier
- Page weight matters to you: Usercentrics added 47 KB less to the first load

## Questions about this pair

### Is OneTrust faster than Usercentrics?

Not in a way this run can separate. Their banner times were about the same. The gap is under 20%, within run-to-run noise. Neither added a measurable delay.

### Do OneTrust and Usercentrics both support IAB TCF?

Both document it. Statuses come from vendor docs.

### Do OneTrust 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.

## Related comparisons

- [c15t vs OneTrust](https://cookiebench.com/compare/c15t-vs-onetrust.md)
- [c15t vs Usercentrics](https://cookiebench.com/compare/c15t-vs-usercentrics.md)
- [OneTrust vs Didomi](https://cookiebench.com/compare/onetrust-vs-didomi.md)
- [CookieYes vs OneTrust](https://cookiebench.com/compare/cookieyes-vs-onetrust.md)
- [Osano vs OneTrust](https://cookiebench.com/compare/osano-vs-onetrust.md)
- [Didomi vs Usercentrics](https://cookiebench.com/compare/didomi-vs-usercentrics.md)

Methodology [cookiebench-v3.2.4](https://cookiebench.com/methodology). inth, the team behind c15t, maintains CookieBench. c15t is one of the consent managers we measure ([disclosure](https://cookiebench.com/methodology)). Feature support comes from vendor documentation unless a row says "Verified by test".