Compare audits over time

See progress between audits

Pro+ unlocks the Compare mode — pick any two audits of the same site and we diff them.

How to use it

1. Open any completed audit
2. Click the Compare button in the header
3. Pick the comparison audit (default = the most recent earlier one)
4. Side-by-side view loads instantly

What you see

• Score delta per pillar — green for improvements, red for regressions, neutral for unchanged
• Top movers — 5 biggest improvements + 5 biggest regressions
• Fixed issues — items present in the earlier audit, absent in the later one (green)
• New issues — present only in the later audit (yellow)
• Persistent issues — present in both (no colour change)
• Per-page change list — every page that changed score by ≥3 points

PDF "Progress Since Last Audit" section

When generating a PDF for an audit that has a previous snapshot, we automatically include a §17.5 "Progress Since Last Audit" section showing the same diff. Skipped on the very first audit.

Snapshot storage

We keep the last 12 snapshots per site (rolling window). Older snapshots are garbage-collected to keep storage costs sane. Snapshots are JSON, typically 50-500KB each.

Pro tip

For Agency users delivering monthly reports, Compare mode is the feature that makes month-over-month conversation easy with non-technical stakeholders. "Look — we improved 8 points overall, fixed these 14 issues, here's what's still on the list."