---
name: Thumbmark
domain: thumbmarkjs.com
kind: product
relation: competitor
segment: fraud prevention and risk management
descGrounded: 0.44
---

# Thumbmark

A browser fingerprinting library that generates persistent visitor identifiers across sessions.

**Route:** surfaced by the fraud prevention and risk management lane's de-branded queries → competitor to stripe.com.

**Why it's on the map:** Sells the same browser-identification capability to the same developers who would evaluate the anchor's visitor identification features.

**Receipts** (verbatim from its page this run):

> Visitor Identification at Scale

> identify visitors across sessions

> browser fingerprinting

**Edges:**

- competitor [[every-io]]
