Zaraz

Zaraz runs analytics, pixels, tags, and other third-party scripts at the edge instead of in the browser. It is one of Cloudflare’s best acquisitions on paper. When it works, moving that JavaScript off the main thread produces a visible performance improvement.

In practice, the integration catalog is thin. Anything missing requires a custom managed component, and working out why an event did not fire is frustratingly opaque. Configuration changes and migrations over the years have not inspired confidence.

I keep revisiting Zaraz because I want it to be good, but Cloudflare’s attention seems to have moved elsewhere. It works for a couple of well-supported analytics tools. Keep expectations low beyond that.