Run it
A/B tests
Run two versions with the same prospects and get one verdict.
Run the same prospects against two versions, then compare. You get one verdict.
Run both sides
Label each run with a variant, then compare the newest of each.
leakdown https://your-site.com --variant control --yes --headless
leakdown https://new.your-site.com --variant new-pricing --yes --headless
leakdown --compare your-site.com# your-site.com — variants compared
Newest run per variant: `control` → your-site.com/2026-09-17/10-14-02--control; `new-pricing` → your-site.com/2026-09-17/11-30-48--new-pricing.
| variant | sessions | completed | leaked | how sure |
|---|---|---|---|---|
| `new-pricing` | 10 | 3 | 7 | 70% [40–89%] |
| `control` | 10 | 7 | 3 | 30% [11–60%] |
**Verdict:** `new-pricing` leaks more — 40 points more of its visitors gave up than in `control` (40–89% vs 11–60%).
Written: runs/your-site.com/COMPARE.md
--variant labels every session and the run folder, so two variants never share a report. --compare takes the newest run of each.
Reading the verdict
For each side: sessions, completed, leaked, an interval, and where it lost people. Then one line:
| Verdict | When |
|---|---|
| Which side leaks more | The intervals do not overlap. |
| No meaningful difference | The intervals overlap. |
| Too few | Under three sessions on a side. |