All blockchain transactions are by default public, but blockchain data alone doesn’t mean much for anyone. Just the sequence of wallet addresses and numbers won’t be meaningful until someone assigns identities to users and meaning to these transactions.

The difference between the raw data and meaningful information sparked a whole new industry. Various businesses have developed solutions that allow them to analyze blockchain data, label it, and then sell it to interested parties, including banks, law enforcement agencies, or a crypto casino that would check whether the deposit address had any associations with fraudulent or sanctioned wallets.

Who Actually Collects This Data

Blockchain explorers such as Etherscan offer people the ability to analyze wallet addresses and their transaction history for free, but that level of analysis will seldom reveal the actual owner of an address. Converting a seemingly random string of numbers into anything meaningful – an exchange, a fund, a known fraudulent wallet – requires specialized analytics platforms. A few companies dominate different corners of this market:

• Chainalysis focuses on anti-money laundering, sanctions screening, and risk scoring for institutions and government agencies.
• Nansen tracks wallet behavior and smart money flows for retail and institutional traders.
• Glassnode provides market intelligence metrics like holder distribution and realized price.
• Dune Analytics lets anyone build custom dashboards from public blockchain data.
• Elliptic specializes in compliance screening and flagging high-risk addresses.

This was exactly the idea behind Chainalysis, which categorized wallet addresses according to entities and gave users platforms like Reactor for analyzing how funds flow through a network. Nansen, on the other hand, approached the problem from a different angle, combining on-chain analytics with artificial intelligence to track the purchases and sales made by “smart money” wallets.

The Market at a Glance

Funding into this sector has grown alongside demand for compliance tools and trading signals. Chainalysis raised $100 million in a Series E round at a $4.2 billion valuation, while smaller firms like TRM Labs have raised tens of millions to build competing products.

The data itself sits on a public ledger anyone can technically access. What buyers actually pay for is the labeling, context, and speed that turn that raw ledger into something they can act on before someone else does.

Who Buys This Data and Why

Governments and law enforcement agencies were among the earliest buyers, using blockchain analytics to trace funds tied to hacks, ransomware payments, and sanctions evasion. Chainalysis alone now serves clients across roughly 40 countries, spanning financial institutions, exchanges and regulators. Buyers and their typical reasons for paying for blockchain data:

• Regulators and law enforcement, tracing illicit fund flows and sanctions violations.
• Banks and exchanges, running compliance checks before allowing transactions.
• Hedge funds and trading firms, watching whale wallets for early signals.
• Journalists and researchers, investigating fraud cases and market manipulation.
• Crypto platforms, screening deposit addresses against known risk databases.

It was meant to be a tool of transparency par excellence. What ended up happening was quite the opposite – a need for a service for companies that could translate that transparency into actionable information. The list of letters on Etherscan means nothing by itself. The interpretation of that information and the first-mover advantage of it is provided by such services as Chainalysis, Nansen, Elliptic, and a few more.

The value of this service comes not from the data itself, which is freely available to anyone from the blockchain, but rather from the labeling, contextualization, and fast reaction to this data before other companies get to see it. Governments use it to trace money laundering. Banks use it for their compliance purposes.