Venues / Nansen

Is Nansen legit and safe?

Nansen is a real, operating trading terminal live since 2020-04. It is embedded-wallet, and is backed by Andreessen Horowitz (a16z), with Skyfall Ventures, Coinbase Ventures, imToken Ventures, Mechanism Capital and QCP Capital (Series A); Accel, with GIC, a16z, Tiger Global and SCB 10X (Series B). We found 1 reported incident (listed below). Legit is not the same as low-risk: the coins traded on it can still go to zero.

The checklist

Custody: who holds your money

Trading uses the embedded Nansen Wallet, powered by Privy; Nansen's help center says it is non-custodial and Nansen never accesses the keys. You cannot connect or import an external wallet for trading, only deposit from one. One wallet per chain. Withdrawals on web require MFA. Portfolio tracking works with any wallet address.

Who backs Nansen

• Andreessen Horowitz (a16z), with Skyfall Ventures, Coinbase Ventures, imToken Ventures, Mechanism Capital and QCP Capital (Series A) — $12,000,000 (2021-06) source
• Accel, with GIC, a16z, Tiger Global and SCB 10X (Series B) — $75,000,000 (2021-12) source

Incidents

• 2023-09-20: User data exposed through a third-party vendor. Nansen said an attacker gained admin access at an unnamed vendor it used for customer access, exposing the email addresses of about 6.8% of users, password hashes for some and blockchain addresses for a smaller share. Users were told to reset passwords; wallet funds were not affected. source

Real downsides

• The default 0.75% per spot swap (1.5% buy plus sell) costs more than Fomo's 1% round trip, unless you hold Pro or climb tiers.
• Trading only works through the embedded Nansen Wallet; you cannot connect MetaMask or Phantom to trade.
• Perps are unavailable in the US and UK, and Nansen's help center lists both as restricted for spot trading too.
• A 2023 vendor breach exposed about 6.8% of users' email addresses and some password hashes.

Can you use it where you live?

Nansen's Terms of Service (updated 2026-08-10) say access 'may be restricted' in 'the Gelephu Mindfulness City Special Administrative Region and the Kingdom of Bhutan, Singapore, Cuba, Iran, North Korea, Syria, and certain regions in Ukraine (including Crimea, Donetsk, and Luhansk)', and add 'For the Perpetuals Feature ... the United States and the United Kingdom'. Its trading help article goes further and lists the US and UK as restricted from spot and perps trading. Its outcome-contract feature has a longer list that includes the Netherlands, Belgium, Poland, Hungary and Ireland. The first list applies to all of Nansen, analytics included. (source)

We report what the venue's own terms say. Don't use a VPN to get around restrictions; venues can freeze accounts that do.

How to use Nansen without getting scammed

• Only open nansen.ai — fake lookalike sites and "support" DMs are the most common way people lose funds on any trading venue.
• Never share a seed phrase or private key. No real support agent will ask for one.
• A referral code only changes your fee and who gets a share of it. It never needs your keys.
• Treat every new memecoin as able to go to zero. A legit venue does not make the coins on it safe.

Comparing options? See the full Nansen sheet or Bankr, fomo, Axiom.

More on Nansen: Overview · Referral code · Fees · Is it legit? · Alternatives · US alternatives · Available in the US? · Mobile app? · Custodial? · Supported chains