NeptuneWallet: Official Lightweight Support is Here

Wallets are the most central piece of software for a blockchain. Without it, a blockchain cannot serve its most central function, money.

For this reason, the reference implementation of the Neptune protocol, neptune-core, has provided full wallet functionality since Neptune's launch on February 11, 2025. However, we recognize that not every user wants (or is able) to run a full node. A lightweight alternative has consistently been our most requested feature.

To meet this demand, the VxBlocks team was the first to release a functional light wallet that bypassed the need to download the entire blockchain. While their work was a vital contribution, it faced two hurdles:

Server Complexity: It relied on a modified version of neptune-core, making it difficult for third parties to host servers.
A security review: by keyper-labs identified critical vulnerabilities that prevented us from recommending it for general use.

Bringing NeptuneWallet "Into the Fold"

To provide our users with a safe, reliable, and officially supported tool, we decided to bring the NeptuneWallet under the core team’s wing. Using the VxBlocks codebase as a foundation, we have modified neptune-core to act as a seamless server for NeptuneWallet and addressed the most important vulnerabilities identified in the security audit.

Key Features & Privacy Protections

NeptuneWallet is designed for users who value privacy and efficiency without the overhead of a full node. It strikes a good balance between avoiding the need to trust a server, and efficiency.

Server-Side Blindness: When you initiate a transaction, the amounts and recipients remain completely hidden from the server.
Input Privacy: The wallet never reveals to the server which specific inputs are being used in a transaction, even when recovering the data required to initiate a transaction.
Reduced Data Footprint: By skipping block proofs during the download process, the wallet significantly reduces bandwidth usage and sync times.
Block-Level Privacy: Because the wallet downloads all blocks, it never leaks metadata to the server regarding which specific blocks contain your transactions.
Full Compatibility: Seed phrases are 100% interchangeable between neptune-core and NeptuneWallet.

Limitations

Although the data requirements are significantly lower than a full node, users importing an existing wallet still have to download up to 1GB of block data. This initial block download may take some time, and makes the wallet unsuitable for mobile use.

As a result NeptuneWallet is currently only supported on Windows, Linux, and MacOS. This is not a fundamental limitation of the protocol or the software architecture though, and we hope to address these constraints in further iterations.

Our Philosophy

The goal of NeptuneWallet is simple: to provide a secure, no-frills interface for transacting NPT. We aren't chasing fancy graphics or bloated feature lists; our priority remains the integrity of your coins, the privacy of your data, and the best use of your time.

Get Started

You can download the latest release for your operating system via the link below. Please ensure you have at least 2GB of free disk space to accommodate the initial block synchronization.

Download the latest version of NeptuneWallet: GitHub Releases Page

Contribute!

Neptune is an open-source effort, and we welcome your help in making this wallet even better. If you’d like to contribute, you can:

Check out the open issues on our GitHub repository.
Tackle the remaining security improvements suggested in the keyper-labs report. While we have patched all "Critical" and most "High" priority issues from the review, there is still work to be done.