Walrus

Walrus is a decentralized storage and data availability protocol built on the Sui blockchain by Mysten Labs, the team that also created Sui and the Move smart contract language. It launched mainnet on March 27, 2025, and raised $140 million in a private token sale that same month, with investors including a16z, Standard Crypto, Electric Capital, Franklin Templeton Digital Assets, and RW3 Ventures. The round valued the protocol at approximately $2 billion fully diluted.

The Problem

Centralized cloud storage creates vendor lock-in, data portability barriers, and single points of failure. Existing decentralized alternatives such as Filecoin and Arweave historically require high replication overhead — naive blob replication can demand 10–30× redundancy to achieve meaningful fault tolerance — which drives costs up and limits scalability. At the same time, most Web3 storage solutions treat stored data as opaque files, with no programmable control at the smart contract layer.

How Walrus Works

The core technical innovation is RedStuff, a proprietary two-dimensional erasure coding scheme developed by Mysten Labs. When a user stores a blob, RedStuff encodes it into slivers — small encoded fragments — and distributes them across independent storage nodes. The system achieves Byzantine fault tolerance at just 4–5× replication: data can be fully recovered even if two-thirds of storage nodes go offline or act maliciously. This compares favorably to Filecoin's replication requirements and achieves reported cost savings of approximately 80% against Filecoin and up to 99% against Arweave for equivalent availability.

The storage architecture separates two layers. The Sui blockchain serves as a coordination and metadata layer, where each stored blob is represented as a Sui Move object. This means Move smart contracts can programmatically control, route, update, and pay for storage. The actual blob data lives across the decentralized storage node network, which nodes are incentivized to maintain through the WAL token's staking mechanism.

Each storage epoch, nodes commit to storing and serving their assigned slivers. The protocol uses asynchronous storage challenges and authenticated data structures to prevent both malicious node behavior and client-side manipulation. Data can be retrieved by downloading a sufficient subset of slivers from the distributed network without needing to download an entire blob.

Walrus exposes storage through a CLI tool, JSON and HTTP APIs, and SDKs for Python, Swift, and Dart, making it accessible across development environments.

WAL Token

The WAL token underpins the protocol's economics with a maximum supply of 5 billion tokens. Its functions include:

• Storage payments: Users pay WAL for storage services; fees are distributed to storage node operators.
• Staking: Network security relies on Delegated Proof-of-Stake (dPoS), where WAL holders delegate to storage node operators and earn staking rewards. Poor-performing nodes face slashing penalties; short-term stake shifting incurs partial token burns.
• Governance: WAL holders vote on protocol upgrades and parameter changes.

Token allocation reserves over 60% for community uses: 10% user airdrop (4% distributed at mainnet launch, 6% reserved for future distributions), 43% Community Reserve, and 10% storage subsidies. Core contributors hold 30% and private investors 7%, with investor allocations beginning to unlock in March 2026, one year after mainnet.

A USD-denominated pricing model launched in May 2026, fixing storage at $0.023 per GB per month, with payments settled in WAL tokens at market rates.

Key Features

Verifiable storage: All data stored on Walrus carries cryptographic proof of correctness. Anyone can verify data integrity independently without trusting the storage provider.

Programmable storage: Because each blob is a Sui object, developers can write Move contracts that conditionally release data, automate storage renewals, or build monetization layers directly on top of stored content.

Walrus Memory: In June 2026, Walrus launched a dedicated persistent memory layer for AI agents called MemWal. It provides verifiable, portable agent memory that persists across sessions and transfers between applications and agent frameworks. Integration plugins target popular frameworks including NemoClaw and OpenClaw.

IPFS bridge: In June 2026, Walrus announced IPFS integration via Lighthouse, extending its reach to developers already using IPFS-based workflows.

Chain-agnostic design: While coordinated through Sui's smart contract layer, Walrus is built to integrate with any blockchain, positioning it as a shared data layer for multi-chain applications.

Adoption

Notable adopters since mainnet include Team Liquid, which migrated 250 TB of esports match footage and brand content; Allium, a blockchain data infrastructure provider storing 65 TB of institutional-grade data; and Tatum, which brought 11 TB of historical blockchain datasets onto Walrus. Decrypt, the crypto news publication, and TradePort, Sui's largest NFT marketplace, both run infrastructure on Walrus. As of early 2026, over 120 projects had integrated with the protocol.

Team and Background

Walrus is developed by Mysten Labs, founded by former members of Facebook's Novi/Diem research team, including Evan Cheng, Adeniyi Abiodun, Sam Blackshear, George Danezis, and Kostas Chalkias. The team created both the Sui blockchain and the Move smart contract language before launching Walrus as a complementary infrastructure layer for unstructured data storage. Governance of the Walrus protocol is handled by the Walrus Foundation, a separate organization established alongside mainnet launch.

Ecosystem Fit

Walrus is a Sui-native protocol targeting the Web3 data infrastructure market. It addresses use cases where smart-contract-controlled, verifiable, and cost-efficient blob storage is required: NFT metadata and media storage, dApp backend infrastructure, DeFi transaction archives, enterprise data pipelines, and AI agent memory. Its chain-agnostic storage API means developers from any blockchain ecosystem can store blobs through Walrus while receiving cryptographic verification guarantees.