We measure our own
impact on your page
Every ad vendor says their tag is fast. Keystone measures its own impact on your Core Web Vitals on real traffic and it's upfront about it.
Speed is revenue. You deserve the real numbers.
Core Web Vitals affect search visibility and how long readers stay. When a page gets slower, you need to know whether the cause is your content, another vendor, or us.
Light from the start
The tag is lightweight and loads only the formats that apply to each visit.
Measured on real pageviews
Not lab tests. Keystone measures LCP, CLS and INP on your real visitors.
Ours vs. the page's
Each metric is split into what Babel caused and what the rest of the page caused.
Who's behind your page speed?
Each bar is 100% of the time or movement readers notice.
Your report uses your own traffic. Technical names, for your developers: LCP, CLS and INP.
Ads that don't cost you readers or rankings
Core Web Vitals are Google's measure of page experience, and they affect your search ranking. We watch our share of them so you don't have to.
Protect your SEO
Slow, jumpy pages rank lower. We track our impact on real traffic so ads never quietly cost you search traffic.
Fix the right thing
When a page gets slower, you'll know whether it's us, another vendor or your own content.
Keep readers reading
A fast, stable page keeps people on it longer, which is good for your revenue too.
We play fair with the numbers
We'd rather own up to what's ours than take credit we don't deserve.
We only claim what's ours
If we can't be sure a slowdown came from us, we don't count it as ours, and we don't hide it either.
The full picture
We also show the time your page spends waiting on things around us, like your consent banner, so nothing is left out.
Real readers, not lab tests
Measured on your actual visitors, not simulated tests.
Want these numbers
for your site?
Talk to us and we'll walk you through how Keystone affects your pages.