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River-1 · by LUPO

Your Gmail signups, named.

Who signed up and where they work now, from the email alone. Every answer shows its evidence.

Book a demo See it work

Illustrative example, sped up: a signup from alex.m4417@gmail.com is answered in 4 minutes as Confirmed. Who: Alex Mercer, Staff Engineer. Business: Northbank Financial, works at, as of September 2026, card issuing and treasury software, enterprise. How we know: a public record shows this exact address next to this name; seven sources agree, the latest from September 2026, each one linked. Earlier answers: Priya Raman, CEO of Tidewater Labs; James Whitfield, Head of Growth at Corran Logistics; Dan Ito, Product Lead at Brackenly.

about 75 to 90% of signups to AI-native products use a personal email Practitioners report · Growth Unhinged, Feb 2026
1 Input: the email address, nothing else
0 Changes to your signup flow

What you get

Every answer comes with its evidence.

How many sources agree, how recent they are, and a link to each one. Your team checks the proof, not a score.

Illustrative answer: Alex Mercer, Staff Engineer at Northbank Financial, Confirmed. Seven public sources agree, the latest from September 2026, each one linked: the exact address next to the name; his name and role at Northbank Financial; the same address on a second page; Northbank Financial naming him on its team; recent work for Northbank Financial; the same name, city and role; the address and name a third time.

Working on now

Where they work today. Not in 2021.

Each company shows how they are tied to it and the month of the record. Old ties are flagged as may be out of date.

Illustrative timeline for Alex Mercer: Works at Northbank Financial, as of September 2026; Runs Kelderwick Studio, as of August 2026; worked at Orvane in 2021, marked may be out of date.

Why River

Fewer blanks. Nothing to take on trust.

01

Fewer blank rows.

Run the same signups through your current tool and River-1. Count the blanks.

02

Proof you can click.

Every Confirmed answer links to the public record behind it. Check any of them by hand.

03

Scored by you.

Test it on signups you already know. Count the right names and the wrong ones.

04

Your data stays yours.

Your signups are never pooled with another customer's.

Delivery

Signups in. Answers out.

Quick answers within minutes. The rest as they are found.

Signups inRiver-1Answers out
  • TestA file of emails
  • LiveAn API call per signup
  • AnswersTo your webhook
  • OrPoll by id

Who we are

LUPO is an AI lab in London.

River-1 is our first freemail model, built for product-led and API companies.

Questions

The short answers.

What is freemail enrichment?
Matching a personal email signup, such as Gmail, Hotmail or Outlook, to the person behind it and the company they work at, so your sales team knows who signed up.
What comes back with an answer?
The person and their role, the company they work at with the month of the record, and the evidence: how many public sources agree, how recent they are, and a link to each.
How do answers arrive?
Through an API, with each answer sent to your webhook or fetched by id. The quick ones land within minutes, the rest as they are found. The test can start with a file.
Is there self-serve?
Self-serve is coming soon. For now, every engagement starts with a test on your own signups.

Start

Test it on your own signups. Score it yourself.

  1. 01Mutual NDA
  2. 02Send the email column
  3. 03A result on every row
  4. 04You score it
Book a demo

Or write to hello@lupolabs.ai