Solution · Repeat signups
The same person, a new email.
New email, new VPN, cleared cookies: to your app, each signup looks like a stranger. Darkmeter looks for what stays the same.
What you are seeing
Is this new signup someone we already know?
Email and IP address are easy to change. Browser traits, look-alike names and signup timing are harder to hide all at once.
- Many accounts share look-alike names, such as name.77 and name+3.
- Signups from one device cluster within minutes.
- Email verification passes, yet the same person keeps coming back.
- A new VPN and new cookies, with the same browser traits.
Along the whole flow
The signup path
Darkmeter sits at four points along the way. Each one is a call your backend already makes, and a decision you control.
1 · Page load
The browser SDK produces a device token.
Reads the browser's own traits.
SDK and APIAllow2 · Submit
Your backend sends the email, the token and the IP.
Compares them with devices and emails already seen.
Signup GuardVerify3 · Verdict
The answer arrives while the person is still logging in.
Returns allow, limit, verify or block, with reasons.
Signup GuardLimit4 · Review
Your team looks at the group afterwards.
Shows the linked accounts and the evidence.
ConsoleAllow
Case by case
The situations you will actually meet.
Pick one. See the call your backend makes, what Darkmeter answers, and what the person is shown.
Your backend ⇄ Darkmeter
Illustrative situations and wording. Verdicts and reason names are a preview of the planned API.
Before and after
One person, five signups, twice
An illustration, not a measurement: the same events, with the decision made at the right moment.
Without Darkmeter
- The first signup gets the full free grant.
- The second, third and fourth look like strangers.
- Each one gets a full grant too.
- The cost shows up later, as one big bill.
With Darkmeter
- The first signup gets the full free grant.
- The second links to the same device.
- Later ones get a smaller grant or a verify step.
- Your console shows the whole group in one place.
Questions
Bring us your free tier.
Tell us how your free tier works and where it leaks. We will map it to the four points above.