Surface the Signal
in Blockchain Data

Nansen analyzes 50M+ labeled Ethereum wallets and their activity.
So you can separate the signal from the noise in blockchain data.

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Loved by the Smartest Teams in Crypto

"Nansen is my go-to tool for crypto analytics because it uniquely combines on-chain data with a rich wallet database. Simply put, I do not make investment decisions without consulting it first."

- Spencer Noon
Head of Investments, DTC Capital

"Nansen is absolutely epic! An indispensable tool to identify which token is being accumulated and which is being distributed. I no longer buy or hold crypto assets without it. But warning, Nansen may be addictive!"

- Marco L.

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Terms of Service

Privacy Policy

© 2020 Nansen Limited. All rights reserved.

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Privacy Policy

Nansen is a service by Nansen Limited, a Hong Kong company.

We have a few fundamental principles that we follow:

We don’t ask you for personal information unless we truly need it.We don’t share your personal information with anyone except to develop our products, protect our rights, or comply with the law.We don’t store personal information on our servers unless required for the on-going operation of our service.It is our policy to respect your privacy regarding any information we may collect while operating our service.
WEBSITE VISITORS
Like most website operators, we collect non-personally-identifying information of the sort that web browsers and servers typically make available, such as the browser type, language preference, referring site, and the date and time of each visitor request.

Our purpose in collecting non-personally identifying information is to better understand how visitors use our website.

From time to time, we may release non-personally-identifying information in the aggregate, e.g., by publishing a report on trends in the usage of our website. We also collect potentially personally-identifying information like email addresses for newsletters and logged-in services.

GATHERING OF PERSONALLY-IDENTIFYING INFORMATION
Certain visitors to our website choose to interact with Nansen in ways that require us to gather personally-identifying information.

The amount and type of information that Nansen gathers depends on the nature of the interaction. For example, we ask visitors who sign up to become users of our service to provide an email address. We do this simply because it is the most convenient way to persist a user account over time, while having the possibility to communicate with you as a user (via email).

When signing up to Nansen as a user, you are automatically enrolled into our email communication, but you can unsubscribe at any time by clicking the "Unsubscribe" button in our emails.

When users are logged in, we also save the information given to us as necessary for the service to provide value. Nansen collects information only insofar as is necessary or appropriate to fulfill the purpose of the visitor’s interaction with Nansen. Nansen does not disclose personally-identifying information other than as described below. Visitors can always refuse to supply personally-identifying information, with the caveat that it may prevent them from engaging in certain website-related activities.

AGGREGATED STATISTICS
Nansen may collect statistics about the behavior of visitors and users of its websites. For instance, Nansen may monitor the most popular dashboards or queries on Nansen. Nansen may display this information publicly or provide it to others. However, Nansen does not disclose personally-identifying information other than as described below.

PROTECTION OF CERTAIN PERSONALLY-IDENTIFYING INFORMATION
Nansen discloses potentially personally-identifying and personally-identifying information only to those of its employees, contractors and affiliated organizations that:
(i) need to know that information in order to process it on Nansen behalf or to provide services available at Nansen websites, and
(ii) that have agreed not to disclose it to others.

Some of those employees, contractors and affiliated organizations may be located outside of your home country; by using Nansen, you consent to the transfer of such information to them. Nansen will not rent or sell potentially personally-identifying and personally-identifying information to anyone.

Other than to its employees, contractors and affiliated organizations, as described above, Nansen discloses potentially personally-identifying and personally-identifying information only in response to a subpoena, court order or other governmental request, or when Nansen believes in good faith that disclosure is reasonably necessary to protect the property or rights of Nansen, third parties or the public at large.

If you are a registered user of an Nansen website and have supplied your email address, Nansen may occasionally send you an email to tell you about new features, solicit your feedback, or just keep you up to date with what’s going on with Nansen and our products.

Nansen takes all measures reasonably necessary to protect against the unauthorized access, use, alteration or destruction of potentially personally-identifying and personally-identifying information.

COOKIES
A cookie is a string of information that a website stores on a visitor’s computer, and that the visitor’s browser provides to the website each time the visitor returns.

Nansen uses cookies to help Nansen identify and track visitors, their usage of Nansen website, and their website access preferences. Nansen visitors who do not wish to have cookies placed on their computers should set their browsers to refuse cookies before using Nansen's websites, with the drawback that certain features of Nansen websites may not function properly without the aid of cookies.

3RD PARTY PROVIDERS
The following is a list of trusted 3rd party providers and products that we use to collect, store, and process user data:

Coinbase CommerceGoogle (Analytics, Cloud Platform, Drive)MailchimpSlackStripeZapier
Nansen may add or subtract 3rd party providers based on business needs, and in Nansen's sole discretion. We encourage visitors to frequently check this page for any changes to list of providers.

BUSINESS TRANSFERS
If Nansen Limited or substantially all of its assets were acquired, or in the unlikely event that Nansen Limited goes out of business or enters bankruptcy, user information could be one of the assets that is transferred or acquired by a third party. You acknowledge that such transfers may occur, and that any acquirer of Nansen Limited continue to use your personal information as set forth in this policy.

DATA CONTROLLER AND DATA PROTECTION OFFICERS
The Data Controller for the processing of personal data is:

Nansen Limited
2301 Bayfield Building
99 Hennessy Road
Wan Chai
Hong Kong
hello@nansen.ai

For further information about your data protection rights, you may contact Nansen Limited's Data Protection Officer at the email address above.

PRIVACY POLICY CHANGES
Although most changes are likely to be minor, Nansen may change its Privacy Policy from time to time, and in Nansen's sole discretion. Nansen encourages visitors to frequently check this page for any changes to its Privacy Policy. Your continued use of this site after any change in this Privacy Policy will constitute your acceptance of such change.

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Terms of Service

Last updated: September 10, 2020

Please read these Terms of Service ("Terms", "Terms of Service") carefully before using the Nansen websites (the "Service") operated by Nansen Limited ("us", "we", or "our").

Your access to and use of the Service is conditioned on your acceptance of and compliance with these Terms. These Terms apply to all visitors, users and others who access or use the Service.

By accessing or using the Service you agree to be bound by these Terms. If you disagree with any part of the terms then you may not access the Service.

DISCLAIMER
All information displayed on this page (including https://pro.nansen.ai and all other subdomains), and the rest of this website, is purely for informational purposes. Although we do our best to ensure accuracy of our content, there is no guarantee that the information is correct. We take no responsibility for any losses incurred due to information displayed on this website. We are not financial advisors. Always do your own research.

USAGE RESTRICTIONS
A User of the Service agrees and warrants that User shall not:

1. Copy, reproduce, modify, distribute, publicly display, use or disclose the Service, except as expressly permitted in this Agreement;

2. Sell, license, or commercially distribute the Service to third parties or use as a component of, or as a basis for, any material offered for sale, license, or commercial distribution, including using the Service as a primary source to create and/or maintain any database that User publishes or distributes to third parties;

3. Distribute or commercially provide any databases, interfaces, mobile platforms, or software programs comprising the Service;

4. Share, recompile, decompile, disassemble, reverse engineer, or make or distribute any other form of, or any derivative work from the Service;

5. Use the Service, directly or indirectly, in any manner that could cause the Service so used to: (i) be a substitute for the Services by a third party, (ii) affect Nansen's ability to realize revenue in connection with the Services, or (iii) compete with Nansen's business;

6. Store or use data or content in an archival file site, database or other searchable repository except as expressly permitted by this agreement or in an applicable order form.

LINKS TO OTHER WEB SITES
Our Service may contain links to third-party web sites or services that are not owned or controlled by Nansen.

Nansen has no control over, and assumes no responsibility for, the content, privacy policies, or practices of any third party web sites or services. You further acknowledge and agree that Nansen shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any such content, goods or services available on or through any such web sites or services.

We strongly advise you to read the terms and conditions and privacy policies of any third-party web sites or services that you visit.

TERMINATION
We may terminate or suspend access to our Service immediately, without prior notice or liability, for any reason whatsoever, including without limitation if you breach the Terms.

All provisions of the Terms which by their nature should survive termination shall survive termination, including, without limitation, ownership provisions, warranty disclaimers, indemnity and limitations of liability.

GOVERNING LAW
These Terms shall be governed and construed in accordance with the laws of Hong Kong, without regard to its conflict of law provisions.

Our failure to enforce any right or provision of these Terms will not be considered a waiver of those rights. If any provision of these Terms is held to be invalid or unenforceable by a court, the remaining provisions of these Terms will remain in effect. These Terms constitute the entire agreement between us regarding our Service, and supersede and replace any prior agreements we might have between us regarding the Service.

CHANGES
We reserve the right, at our sole discretion, to modify or replace these Terms at any time. If a revision is material we will try to provide at least 30 days notice prior to any new terms taking effect. What constitutes a material change will be determined at our sole discretion.

By continuing to access or use our Service after those revisions become effective, you agree to be bound by the revised terms. If you do not agree to the new terms, please stop using the Service.

CONTACT US
If you have any questions about these Terms, please contact us via email: hello@nansen.ai

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About Nansen

What exactly is Nansen?

Nansen is an analytics platform for blockchain, which combines on-chain data with a massive and constantly growing database containing millions of wallet labels.

Customers use Nansen to access this data via user-friendly dashboards, direct SQL queries, or APIs.

Why did you build Nansen?

After years of working with blockchain data, we found that many of our clients wanted the same thing:
to know more about the wallets that are transacting on-chain.

So we started building Nansen in 2019 to address this need, and have quickly become a leading provider of data and analytics for Ethereum.

How do you get the wallet labels?

Our labels come from a variety of sources, including:
HeuristicsSmart-contract parsing and analysisInvestigations and research by our teamUser submissionsWeb scrapingMachine learning
... and crucially the interplay between all of these sources.

More than 99% of our labels are algorithmically inferred.

We aim for extremely high precision, meaning we'd rather not label an address than label it incorrectly.

One key thing to realize is that there is a very strong network effect in adding wallet labels. If we know that wallet X is of type A, and wallet Y is of type B, then if wallet Z interacts with X and Y in a certain way, we can sometimes infer that Z is of type C.

The consequence is that every wallet label we add to our platform can help us infer even more wallet labels.

For the on-chain data itself, we rely heavily on the open source project Ethereum ETL. The main contributors to Ethereum ETL are members of the Nansen core team.

What are some examples of wallet labels included in Nansen?

We include a wide range of types of labels in our platform. The two main ones are entities and categories. An entitity might be an exchange like Binance, or a fund like Placeholder. A category might be "Dex Trader" or "ETH ICO Participant".

What about privacy?

This is a common question, and the first thing to make clear is that we do not focus on personal individuals in our wallet labels.

One important source of data for Nansen is the blockchain itself. It's important to understand that blockchains are public and immutable. We have no control of what users decide to publish on them.

A relevant example is the Ethereum Name Service (ENS), which lets users purchase a human-readable name for their wallet (e.g. nansen.eth). When a wallet registers such a domain (or is involved in the transfer of one), this is recorded forever on the Ethereum blockchain. And since anyone with a computer and an internet connection can run an Ethereum node, the data point representing this transaction is openly available to the world.

Nansen includes information about ENS ownership of wallets (both past and present), and in some cases this might be revealing of an association between a private individual and a wallet.

So while we could remove data points potentially revealing personal identities from our platform, we think it's better that they're made aware that this information is already in the public domain - accessible to anyone.

We are committed to educating users of the privacy risks involved in using blockchains.

In some cases, project co-founders, advisors, and otherwise public figures have shared their addresses in the public domain (e.g. in transparency reports, or news articles). In these cases we might add wallet labels with their names, as the information is already in the public domain.

You can also review our privacy policy for information about the privacy of our customers' data.

Who is behind Nansen?

Nansen was incubated in D5 - The Data Science DAO.

The Nansen core team includes:

Evgeny Medvedev
Software engineer and a cloud solutions architect with 10+ years of experience.
Creator of Blockchain ETL, a popular open-source project.

Lars Krogvig
Data engineer and cloud solutions architect with 5+ years experience.
Specialist in Google Cloud and large-scale data.

Alex Svanevik
Data scientist and entrepreneur with 10+ years experience
working with startups, corporate groups, and management consulting.

Why is the platform called Nansen?

We named the platform after Fridtjof Nansen who was an explorer, scientist, diplomat, and humanitarian.

Our core values for Nansen are:
TransparencyCourageIntegrityCuriositySpeed
And we think Fridtjof Nansen is a human embodiment of these values.

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