Comparing crawls

Diff two crawls of a site to see score changes, pages added and removed, and issues that appeared or were resolved.

The Compare tab

Open a project and go to Compare. Pick any two crawls from the history and you get a structured diff:

Score deltas — how Health, GEO, and A11y moved between the two runs.
Pages added / removed — URLs that appeared or disappeared (listed up to 2,000 each way).
Issues appeared / resolved — what newly broke, and what your fixes actually fixed.

That last pair is the useful one: after a deploy, “issues resolved” is your receipt that the fix landed, and “issues appeared” is your early warning.

Automatic comparison

You don’t have to diff by hand to be protected — scheduled crawls compare each run against the previous one automatically and alert you on regressions.

For agents and pipelines

The same diff is available programmatically — via the REST API and as the diff_reports tool on the MCP server — so CI can answer “did this deploy make the site worse?” as a build step.

Still stuck? Email us — a human replies, usually within a day.