Arweave vs Walrus

Arweave is a decentralized network for permanent information storage in an open ledger, with a permanent web built on that storage. Its stated uses include preserving important data and hosting decentralized web apps; people can upload files or create a homepage on the permaweb. Transaction fees are set dynamically by the network, and the documentation recommends checking the price endpoint close to submission. The HTTP-based protocol works with existing clients such as Axios, Fetch, and Guzzle. Listed client integrations cover Go, PHP, Scala, Java, C#, JavaScript, TypeScript, and NodeJS. Node software can be installed from pre-built binaries or built from source; documented roles include solo, coordinated, and pool mining, VDF server, and validator. Arweave describes content as timestamped and tamper-proof through the blockweave, with data integrity checks using transaction data in block hashes and recall blocks. Once one or more miners store data, there is no guaranteed way to delete it, and the policy advises against storing cleartext personal or confidential information. Wallets store private keys; lost key files cannot be recovered by wallet providers.

Walrus is a verifiable data platform for storing and managing data across apps, providers, and agents. Its decentralized storage protocol is coordinated onchain through Sui. Storage costs $0.023/GB/month, paid in WAL, with SUI used for transaction gas; stored data expires when its paid duration ends. Walrus Memory is intended to give AI agents persistent, portable memory across apps and sessions. It supports semantic remember and recall, automatic fact extraction, and generated answers grounded in stored memories. Listed integrations include native MCP support, plugins for OpenClaw and NemoClaw, and compatibility with major LLMs. Developers get TypeScript and Python SDKs, a relayer, smart contract, indexer, and dashboard. Memories are encrypted before storage and decrypted only for an authorized signed request; Sui contracts enforce ownership and programmable access, including scoped delegation. The separate Walrus Console is in a closed, invite-only Mainnet beta, with each space limited to 5 GB and five folders and uploads capped at 100 MiB. Walrus Memory has a launch-period free plan, with usage limits that may change.