Chainalysis makes sense of public blockchains. Cryptocurrency transactions are visible but pseudonymous, which makes it hard to know who is behind an address. Chainalysis clusters addresses, identifies services such as exchanges and mixers, and links activity to known entities using a large body of data and heuristics. Investigators can follow funds through a chain of transfers, and compliance teams can check whether a transaction touches risky or sanctioned counterparties.
Its products serve distinct users. Reactor is an investigation tool used by law enforcement and security teams, KYT (Know Your Transaction) monitors transactions for exchanges and financial institutions, and other tools support risk scoring, sanctions screening, and reporting. The company publishes research on crypto crime trends, which is widely cited. Machine learning helps detect patterns of illicit behavior and attribute clusters of activity.
Chainalysis is sold to organizations on custom contracts and is a standard in the industry. Its attributions are probabilistic, and critics raise privacy concerns about blockchain surveillance, while supporters point to its role in tracking ransomware, scams, and sanctions evasion. Competitors include Elliptic, TRM Labs, and CipherTrace, which is now part of Mastercard. Chainalysis suits regulated crypto businesses and agencies.