CookieBench

Fastest cookie banners for Astro (2026)

Tags that need consent, such as analytics, ads and A/B tests, wait until a visitor chooses. A visitor can choose only when your banner is on screen.

This page ranks ten consent managers on Astro by how fast the banner is on screen, on desktop and on mobile.

Updated
October 2026
Consent managers
10

Why does banner speed matter?

  1. 1. Your tags wait for the banner

    In the EU and the UK, analytics, ad and marketing tags that use cookies must wait for consent. A late banner makes all of those tags late.

  2. 2. You lose data on visitors who leave first

    Some visitors leave before your banner is on screen. They never consent, so you do not get full data on their visit. Your reports then undercount the traffic from your ads.

  3. 3. Your ad platforms get less data

    Ad platforms use conversion data to set bids and to find buyers. When fewer visitors consent in time, the platforms get less data. Each conversion can then cost more.

  4. 4. A/B tests and personalisation start late

    A/B test and personalisation tools that need consent also wait for the banner. Until the visitor chooses, the visitor sees your default page.

  5. 5. A late banner interrupts your visitors

    A visitor starts to read, or moves to click. Then the banner appears over your content. A click for your page can land on the banner.

  6. 6. Interruptions can make visitors leave

    A visitor from an ad or a search result decides fast to stay or to go. A banner that appears late gives that visitor one more reason to go. Your bounce rate can go up.

Top 10 cookie banners for Astro

The list is in desktop order. Each entry also gives its mobile time and place.

  1. 1. c15t

    Open-source consent manager with framework SDKs and a self-hostable backend.

    Desktop
    15 ms (#1)
    Mobile
    260 ms (#1)
    Install
    First-party SDK
    Free plan
    Yes (Open source; hosted free plan)
    IAB TCF
    Yes
    Google-certified CMP
    No (Not on Google’s list)
    Open source
    Yes (Apache-2.0)

  2. 2. CookieYes

    Hosted cookie banner aimed at small and mid-sized sites.

    Desktop
    282 ms (#2)
    Mobile
    1.07 s (#2)
    Install
    Script tag
    Free plan
    Yes (5,000 pageviews a month)
    IAB TCF
    Yes (Pro and Ultimate plans)
    Google-certified CMP
    Yes
    Open source
    No (Proprietary)

  3. 3. Cookie Control

    Script-based cookie consent tool from Civic UK.

    Desktop
    402 ms (#3)
    Mobile
    1.94 s (#4)
    Install
    Script tag
    Free plan
    Yes (Community edition)
    IAB TCF
    Yes (TCF v2.3)
    Google-certified CMP
    Yes
    Open source
    No (Proprietary)

  4. 4. Enzuzo

    Hosted privacy compliance suite with a cookie banner.

    Desktop
    412 ms (#4)
    Mobile
    2.31 s (#6)
    Install
    Script tag
    Free plan
    Yes (5,000 visitors a month)
    IAB TCF
    Yes (Growth plan and up)
    Google-certified CMP
    Yes
    Open source
    No (Hosted embed only)

  5. 5. Didomi

    Consent and preference management platform with a hosted web SDK.

    Desktop
    433 ms (#5)
    Mobile
    3.74 s (#8)
    Install
    Script tag
    Free plan
    No (Contact sales)
    IAB TCF
    Yes (TCF v2.2)
    Google-certified CMP
    Yes
    Open source
    No (Proprietary)

  6. 6. iubenda

    Compliance suite covering cookie consent, policies and terms.

    Desktop
    434 ms (#6)
    Mobile
    2.31 s (#5)
    Install
    Script tag
    Free plan
    Yes (Under 5,000 pageviews a month)
    IAB TCF
    Yes (TCF v2.2)
    Google-certified CMP
    Yes
    Open source
    No (Hosted embed only)

  7. 7. Osano

    Privacy platform with a hosted consent manager.

    Desktop
    649 ms (#7)
    Mobile
    1.79 s (#3)
    Install
    Script tag
    Free plan
    Yes (About 5,000 pageviews a month)
    IAB TCF
    Yes (TCF v2)
    Google-certified CMP
    Yes
    Open source
    Partial (Older library only)

  8. 8. OneTrust

    Enterprise privacy suite with a hosted cookie consent module.

    Desktop
    655 ms (#8)
    Mobile
    3.70 s (#7)
    Install
    Script tag
    Free plan
    No (Quote-based pricing)
    IAB TCF
    Yes (TCF v2.2 and v2.3)
    Google-certified CMP
    Yes
    Open source
    No (Proprietary)

  9. 9. Usercentrics

    Consent management platform; also owns Cookiebot.

    Desktop
    690 ms (#9)
    Mobile
    3.75 s (#9)
    Install
    Script tag
    Free plan
    Yes (1,000 sessions a month)
    IAB TCF
    Yes (Pro plan and up)
    Google-certified CMP
    Yes
    Open source
    No (Commercial licence)

  10. 10. Ketch

    Data permissioning platform with a hosted consent experience.

    Desktop
    1.66 s (#10)
    Mobile
    7.67 s (#10)
    Install
    Script tag
    Free plan
    Yes (5,000 users)
    IAB TCF
    Yes (TCF v2.2)
    Google-certified CMP
    Yes
    Open source
    Partial (SDKs and samples only)

The order on mobile

  1. c15t 260 ms
  2. CookieYes 1.07 s
  3. Osano 1.79 s
  4. Cookie Control 1.94 s
  5. iubenda 2.31 s
  6. Enzuzo 2.31 s
  7. OneTrust 3.70 s
  8. Didomi 3.74 s
  9. Usercentrics 3.75 s
  10. Ketch 7.67 s

Other frameworks

inth, the team behind c15t, maintains CookieBench. We hold c15t to the same rules as every other consent manager. Who maintains CookieBench?

Questions about these rankings

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A late banner delays every tag that needs consent, such as analytics, ads and A/B tests. It also appears over content that visitors started to read. Some of those visitors leave.