LUPO
A LUPO Project
The world's most powerful freemail identity engine. The first that guarantees its own error rate.
Your highest-value developers sign up on personal Gmail and Outlook, with no company attached. River unmasks the person and account behind every one.
Early access the moment River ships, plus build notes from the team.
How River works
River weighs the evidence, scores its own confidence, and writes to your CRM only when the verdict clears your tier. Thin evidence gets a refusal, not a guess.
Why River
Enrichment tools look an email up in a rented database and return their best guess. River works like a fraud engine: it weighs the evidence, scores every candidate, and refuses to answer when the evidence is thin.
A calibrated confidence and a guaranteed false-match rate on every verdict.
The full evidence chain on every verdict, including the signals that voted against.
A wrong company costs more than a missing one, so thin evidence stays unresolved.
Adversarial benchmark · July 2026
Synthetic adversarial set. A benchmark on real funnel data with design partners is in progress; the methodology and full confusion matrix will be public.
| Capability | River | Reverse-email lookups |
|---|---|---|
| Calibrated confidence on every verdict | Yes | Unscored guess |
| Evidence chain, including counter-evidence | Yes | None |
| Refuses when unsure | Yes | Returns a best match, paid per hit |
| Guaranteed false-match rate | Yes | Not offered |
| Works from data you choose to send | Yes | Rented third-party databases |