The first EVM-compatible blockchain with a native, on-chain communication layer.Immutable. Accessible. Secure.
Modern decentralized applications are not static. They generate continuous streams of data such as messages, social feeds, updates, and records. However, the infrastructure available today was not designed for this type of workload. Centralized services are fast and inexpensive, but introduce censorship risk, opaque control, and fragile permanence. Decentralized storage networks improve durability, yet are optimized for static, prepaid data rather than real-time publication. When applications rely on smart contracts instead, simple data is forced into execution-heavy blockspace, where every byte competes with financial transactions and cost and latency become unpredictable.
Publishing data should not require permission, intermediaries, or competing with financial transactions.
Obsidian exists to solve the permanence paradox. We separate transaction execution from data publication, introducing a native data layer that operates alongside EVM blocks without competing with DeFi or smart contract execution for blockspace.
By treating data as a first-class protocol feature rather than forcing it into contract storage, Obsidian removes economic censorship caused by volatile gas markets. Messages are ordered on-chain, secured by proof-of-stake consensus, and made verifiably available through cryptographic commitments and decentralized replication.
Messages are a native protocol feature. Payloads travel as sidecars with cryptographic commitments anchored in blocks.
Standard messaging is supported without user gas costs, allowing frictionless participation and communication without introducing financial barriers.
Once included in a block, data is immutable and protected by decentralized consensus. There are no admin controls and no external takedown paths.
Messages travel as sidecars alongside blocks, never touching the EVM. Cryptographic commitments anchor payloads to the chain while parallel lane committees handle availability. Query by block or sender address via standard RPC.
Standard messages require a VDF proof instead of payment, creating a compute-based spam barrier. Priority messages accept fee bids for guaranteed, time-sensitive inclusion.
Lane committees attest to data availability, and once a block finalizes, the ordering is permanent. Archive nodes (sharded/full) store historical data so retrieval remains possible indefinitely.
Full Ethereum compatibility. Deploy contracts without modification using MetaMask, Hardhat, Ethers.js, and other familiar tools.
Obsidian includes the Silica Protocol for messaging and application data. Standard messages require no fees, with an optional Priority lane (paid in OBS) when fast inclusion matters.
Learn More→Resilient Obsidian Communication Kit
A fully open-source, decentralized messenger. Your messages are encrypted end-to-end and stored permanently on Obsidian. No servers to shut down. No companies to sell your data.
Built for anyone who values privacy, permanence, and freedom.
Build dApps that need permanent, verifiable data storage. Use familiar EVM tools with added communication capabilities.
Publish content that can never be censored or removed. Maintain full ownership of your work forever.
Create tamper-proof audit trails, verifiable records, and transparent communication channels.
Communicate freely with total privacy. Send messages that belong to you, not a corporation, and exist as long as the chain does.
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