Datadog

Datadog’s Vercel integration enables you to ingest all your function logs for analysis and long-term storage. Furthermore, you can use Datadog Synthetics to create browser tests to track the frontend performance of your Vercel-powered applications.

Once you set up the integrations, logs from your Vercel functions will begin to stream into Datadog, where you can archive and analyze them alongside logs from across your infrastructure. Datadog's logs overview visualizes key log data including total requests over time — a useful heuristic for traffic volume within your Vercel Functions–powered backend — along with 4xx and 5xx error log counts. This provides a high-level overview of the performance of your functions.