Nansen

Nansen is a blockchain intelligence platform that transforms anonymous on-chain transaction data into interpretable market signals. Founded in May 2020 by Alex Svanevik, Lars Bakke Krogvig, and Evgeny Medvedev, the platform was built on a simple but powerful premise: every wallet address on a public blockchain is a data point, and labeling those addresses at scale reveals who is actually moving money and why. Where raw blockchain explorers show pseudonymous hashes, Nansen shows context — whether a given wallet belongs to a known exchange hot wallet, a venture fund, a market maker, a high-performing trader, or an entity flagged as Smart Money.

The Core Problem

Public blockchains are fully transparent, but transparency alone does not confer understanding. A token transfer is visible to anyone; knowing whether the seller is a long-term conviction holder reducing risk or a short-term speculator exiting after a quick flip requires labeling and pattern recognition at a scale that individual researchers cannot perform manually. Nansen addresses this by maintaining a proprietary database of over 500 million labeled wallet addresses — the largest such dataset in the industry — and continuously updating it as new addresses become active or identifiable.

How It Works

The labeling engine ingests on-chain data across supported blockchains and cross-references it against a growing set of signals: known exchange deposit addresses, fund disclosure data, ENS names, institutional custody patterns, and behavioral heuristics derived from years of transaction history. Each label carries metadata that allows the platform to classify addresses into categories such as Smart Money, DEX trader, NFT whale, staking participant, or protocol team. These labels feed into the analytics layer, where users can filter, sort, and visualize capital flows across tokens, protocols, and time periods.

Smart Money tracking is the flagship use case. Nansen defines Smart Money as addresses that have demonstrated consistent outperformance — buying before significant price appreciation, exiting before major drawdowns — and surfaces their current positions and recent moves in real time. Traders and analysts use this signal to identify tokens gaining institutional traction before they appear in broader market coverage.

Key Features

The core analytics interface includes token explorer tools, holder activity dashboards, wallet-level profit-and-loss data, and protocol-specific analytics for DeFi activity including liquidity provision, lending, and staking. Custom dashboards allow users to monitor specific wallets or portfolios across multiple chains simultaneously. An AI analyst layer provides on-demand interpretation of on-chain patterns without requiring users to manually construct queries.

In March 2025, Nansen launched a fully integrated trading terminal, marking a strategic expansion from pure intelligence to execution. The trading product allows users to move from identifying an opportunity in the analytics interface directly to placing a spot or perpetual futures trade without switching platforms. On Solana, trade execution is aggregated through Jupiter, ensuring competitive pricing across available liquidity pools. The terminal also supports a non-custodial wallet powered by Privy, meaning users retain control of their private keys rather than depositing funds with a centralized counterparty.

A mobile application available for both Android and iOS as Nansen AI brings the core research and trading features to a portable format, including AI-powered research summaries and cross-chain position tracking. In September 2026 the platform extended its AI layer further with an official ChatGPT plugin, allowing users to query Nansen's labeled wallet dataset and market data directly within a conversational interface.

The API product (NX8) provides programmatic access to Nansen's underlying dataset for developers, quants, and institutional teams building their own tooling. Available endpoints cover Smart Money positions, portfolio snapshots, token screening, address profiling, prediction market data, and points tracking. The API consolidates multi-chain data through a single structured interface, reducing the engineering burden of building proprietary data pipelines.

Supported Chains

Nansen covers a wide range of networks including Ethereum, Solana, Base, BNB Chain, Hyperliquid, Starknet, Avalanche, NEAR, Stellar, TRON, and others. The platform also produces quarterly ecosystem reports for many of these chains, providing independent on-chain research that goes beyond price data to analyze user growth, liquidity trends, and protocol adoption.

Solana Ecosystem Fit

Nansen's Solana integration is deep rather than cosmetic. Solana was one of the two launch chains for the AI trading product in March 2025, alongside Base, reflecting the chain's position as a primary venue for retail and professional on-chain trading activity. Jupiter aggregation ensures that Nansen trade execution on Solana benefits from the same routing quality available natively within the Solana DEX ecosystem. The platform's labeled wallet database covers Solana-native addresses including validators, staking participants, major DEX traders, and DeFi protocol teams, giving Solana-focused analysts the same Smart Money signal quality available on Ethereum.

Team and Funding

The company is led by CEO Alex Svanevik, who studied Cognitive Science at the University of Bergen and holds a Master's degree in Artificial Intelligence from the University of Edinburgh. He previously worked in data science and consulting before co-founding Nansen. Nansen has raised $88.2 million across three funding rounds: a $1.2 million seed round in October 2020 led by Mechanism Capital and Skyfall Ventures, a $12 million Series A in June 2021 led by Andreessen Horowitz, and a $75 million Series B led by Accel with participation from Andreessen Horowitz, GIC, Tiger Global, and SCB 10X. The company is headquartered in Singapore.

The scale of Nansen's backing and the depth of its address labeling database create a compounding advantage — more data improves label quality, better labels attract more users, and broader usage generates new behavioral signals that feed back into the labeling engine. For traders and analysts operating across Solana and other chains, Nansen provides the closest available proxy to institutional-grade market intelligence on public blockchains.