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Neptune Cash
Private by default, post-quantum by design.
Neptune Cash ($NPT) is a cryptocurrency that hides who paid whom, and how much. Its coins are secured by hash-based cryptography, not by signatures a quantum computer could forge.
- Open source
- Community-driven
- No corporate control
Project website: neptune.cash (opens in new tab)
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Find wallets, exchanges, and practical steps for handling NPT.
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Join the community to discuss ideas, test software, improve docs, and build tools.
See ways to contributeWhat makes it different
Three ideas, made simple
Private by default
Sender, receiver, and amount are hidden at the protocol level.
Post-quantum design
Built on hash-based cryptography for long-term post-quantum security. See which cryptocurrencies are quantum-resistant and how Neptune is graded against eleven others.
Private smart contracts
Programmable transaction logic can execute without exposing the data behind it.
The privacy problem
Bitcoin and Ethereum leave a trail. Neptune Cash does not.
Like most blockchains, they record every payment in the open. Paste an address into a block explorer and you see its balance and history, and analytics firms sell tools that link addresses to real people. Neptune Cash hides the sender, receiver, and amount of every transaction, while the network still verifies each one.
Bitcoin, Ethereum & other transparent chains
Publicly visible to anyone
Neptune Cash
Private and confidential by default
Sender hidden Amount hidden Receiver hidden
Latest updates
From the blog
All postsNeptune Bulletin #7
Succinctness, which lets a node verify the whole chain from the latest block, reaches testnet, and most blocks now pay a single destination. Covering 10 to 25 October 2026.
Neptune Bulletin #6
Proving gets several times faster, development turns to succinctness and smart contracts, and Lentern offers mining without a pool. Covering 27 September to 9 October 2026.
Neptune Bulletin #5
Hardfork delta activated at block 55,000, and three node releases hardened the network around it. Sending now needs desktop wallet v4.3.0 or later. Covering 12 to 26 September 2026.
Hardfork delta is live: chained transactions are now allowed
Neptune Cash's hard fork went live at block 55,000 on 24 September 2026. Its rules now allow chained transactions, and Triton VM moves to version 8. Your coins are safe, but sending needs an up-to-date wallet. Here's what changed, and what isn't there yet.
Neptune Bulletin #4
The hard fork lands at block 55,000, around 24 September, and switches on transaction chaining. Nodes need neptune-core 0.17.0 and wallets need an update to send. Covering 27 August to 11 September 2026.
Neptune Bulletin #3
Transaction chaining benchmarked 30% cheaper, four wallet fixes are merged and unshipped, and the claim redemption programme closed. Covering 13 to 26 August 2026.
Where cryptocurrencies stand on quantum risk
A new page on the quantum threat to cryptocurrencies: a large enough machine could spend coins it does not own, and very few are built to stop it today.
Neptune Bulletin #2
Four releases in fourteen days, watch-only addresses in the wallet, and transaction chaining heading into security review. Covering 30 July to 12 August 2026.
A new page on how Neptune Cash works
A new Technology page explains in plain terms how Neptune Cash keeps payments private and proves them valid.
Neptune Bulletin #1
Difficulty up elevenfold behind a faster GPU miner, a security review that found no critical flaws but pushed succinctness back, and the first timelocked NPT trade, at four to one. Covering 15 to 29 July 2026.
The forum for dev updates, this blog for everything else
From now on this blog carries only blog posts, the homepage highlights the latest forum threads, and coverage broadens beyond development to the wider Neptune Cash ecosystem.
Neptune Core 0.11.0 released
Neptune Core 0.11.0 is now available. The main user-facing change is support for two new address formats: viewing addresses and EC hybrid addresses.
Hardfork beta at block height 38,000
Neptune Cash's next consensus upgrade is scheduled for mainnet block height 38,000, estimated around May 12, 2026. Here's what it changes and why you should update your node.
Website is live!
The first version of useneptune.org is now live. More content, updates, and improvements are coming soon.
Ready when you are