> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bronto.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Vercel Speed Insights

> Send Core Web Vitals from Vercel Speed Insights to Bronto with the Speed Insights drain, which requires Speed Insights Plus on the project.

Speed Insights measures Core Web Vitals (LCP, INP, CLS, FCP, TTFB) in your visitors' browsers. Each measurement carries the route, device type, browser, country and deployment.

## Recommended method

[**Marketplace connector**](/integrations/vercel-connector.md): it creates the Speed Insights drain. The drain requires **Speed Insights Plus** on the project ($10 per project per month on Pro, plus $0.65 per 10,000 events).

## Alternatives

* [**Drains you configure**](/integrations/vercel-drains.md) with the `speed_insights` schema.

## Worth knowing

* The free tier (10,000 events per rolling 30 days) is shared by the whole team. When it runs out, Vercel pauses collection for every project for at least 14 days.
* Speed Insights doesn't collect from browsers that report `navigator.webdriver = true`, which most automated test browsers do. Synthetic checks don't show up in it by default.

The [Vercel Web Vitals dashboard](/integrations/vercel-templates.md#vercel-web-vitals-speed-insights-drain) and the LCP and INP monitors are built on this data.

See [Ingesting Vercel Data into Bronto](/integrations/vercel.md) for the full mapping.

## References

* [Speed Insights Drains reference](https://vercel.com/docs/drains/reference/speed-insights)
* [Speed Insights pricing](https://vercel.com/docs/speed-insights/limits-and-pricing)


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