Domain Name Services & SNS

Solana Name Service (SNS) is the original naming protocol on Solana, live since 2020, where people register a short .sol or .sns name that wallets and apps resolve to a wallet address. Domains are transferable on-chain assets, and SNS runs its own marketplace for trading them, with category markets and curated auctions for premium names. Holders can also run a sub-registrar to issue subdomains under their own name. It suits anyone who wants a readable address for receiving payments, and DAOs or communities that want to give members names under a shared domain. The system is mid-migration in 2026: existing .sol names become .sns names, while new .sol domains on the Solana Record Service are airdropped free to eligible holders and activated across wallets through Q4 2026 and into Q1 2027, so which name works where will shift for a while.

AllDomains is a Solana domain naming protocol that lets any qualifying community, project or NFT collection launch its own top-level domain, so a token community can run .bonk and a guild can hand out .superteam names. Its TLD House program supports an unlimited number of TLDs, and most names can be wrapped as NFTs through NameHouse and traded on markets such as Magic Eden. Communities that want a branded namespace for members, with renewal fees flowing to the operator, will get the most from AllDomains, as will users after familiar .com, .xyz or hybrid Web2 .id names. The trade-off is that domains are renewable rather than perpetual, so holding a name carries an ongoing cost, a design AllDomains uses to discourage squatting.

Web3.bio indexes domain names across the major Web3 naming systems — ENS, Basenames on Base, Linea Name Service, and Solana Name Service — and resolves any supported domain to a full identity profile through a unified search interface. As of February 2025, the platform's database covered 3.47 million ENS names, 614,000 Basenames, and 568,000 Linea Name Service entries. A Domain Availability Checker lets users enter keywords and see which Web3 domain names remain available for registration across all supported naming services. This tooling connects directly to the identity graph, so a domain search surfaces not just the domain record but the full web of linked identities — bridging domain discovery and identity exploration in a single query.

3NS is a domain naming protocol that registers .Web3 domains as AI-enabled, tokenized entities across multiple blockchains including Solana, Ethereum, Polygon, and Base. Each domain stores embedded AI logic, workflow definitions, and on-chain governance metadata, allowing it to function as an autonomous agent identity rather than a passive address resolver. Users manage domains through the web3names-app dApp and can publish profile pages tied to the domain's on-chain identity. The protocol positions itself as a distinct alternative to naming services like Solana Name Service or Unstoppable Domains by targeting AI agent discovery rather than human-readable name resolution. Domains build reputation scores and verifiable credentials over time, which counterpart agents use as trust signals before initiating transactions. A MetaMask Snap plugin enables wallet-based domain interaction, and a subgraph indexing layer supports cross-chain domain discovery across supported networks.