Siacoin (SC): D-Score 76/100 — Decentralized BlockIndex D-Score: 76/100 (Decentralized). Siacoin (SC) is a Layer 1 cryptocurrency using PoW consensus. Siacoin: Decentralized, PoW-secured Layer-1 storage blockchain with uncapped supply, host-collateral model, and Foundation stewardship. Source: https://blockindex.ai/coin/sc · Data by BlockIndex.AI · Updated 2026-06-19 D-Score breakdown (0-100, higher means more decentralized) Component: Score: Overall D-Score: 76: Node distribution: 22: Initial distribution: 13: Governance: 21: Age and history: 15: Autonomy: 5: Key facts - Layer: Layer 1 - Consensus: PoW (Other) - Launch: Fair Launch (2015) - Founder: David Vorick; Luke Champine - VC funded: No - Max supply: N/A - Circulating: 56,025,636,522 Market data (as of 2026-06-19) - Price: $0 - Market cap: $38.96M - 24h volume: $3.91M - 24h change: -2.00% · 7d change: -2.66% About Siacoin (SC) is the native utility token of Sia, a purpose-built, open-source Layer-1 blockchain designed to provide decentralized, trustless cloud storage. Conceived by David Vorick while at Rensselaer Polytechnic Institute and joined early on by Luke Champine, the project progressed from academic prototypes in 2013 through public announcements in 2014 and a mainnet launch in June 2015. From the beginning Sia’s mission has been to create a storage marketplace where hosts compete to provide capacity and renters select providers, with cryptoeconomic incentives and on-chain contracts enforcing storage agreements. Over time stewardship of the protocol moved from the original company (Nebulous, Inc.) to The Sia Foundation, a U.S.-registered 501(c)(3) which now coordinates development, administers grants, and receives a portion of block subsidy to fund ecosystem work. Technically Sia is a native proof-of-work blockchain constructed specifically around storage usage. Files uploaded to the network are split into 30 encrypted segments and distributed across independent hosts to provide redundancy and privacy; clients interact with hosts via on-chain contracts and cryptographic proofs that ensure availability and correct storage behavior. The chain supports miner rewards and a block-subsidy model that funds the Foundation; the monetary design intentionally allows for an uncapped supply so newly minted SC aligns with growing storage demand. Key technical priorities include the host collateral model that penalizes misbehaving hosts, tooling for host reputation and benchmarking (HostScore, SiaGraph), and a v2 protocol upgrade series intended to modernize and improve host incentives and core protocol mechanics. The v2 hardfork communications and “V2 - The Final Cut” roadmap items indicate an active upgrade cadence in 2024–2025. In practice, Siacoin’s use case centers on decentralized storage marketplaces and applications that require cost-effective, censorship-resistant, and geographically distributed storage. Renters pay hosts in SC and hosts post collateral to back their storage commitments; this design reduces the need to trust centralized providers and allows builders to integrate content-addressed storage and S3-compatible tooling via projects such as S5. The ecosystem includes developer-oriented services (HostScore, SiaGraph), third-party explorers, and analytics coverage (CoinMarketCap, CoinGecko, Messari), and an active grants program administered by the Foundation which has allocated multi-million-dollar funding to bootstrap tooling and integrations. Real-world adoption includes projects leveraging Sia for archival storage, content distribution, and developer tooling that bridge the Sia storage marketplace with conventional cloud workflows. Tokenomics for SC are distinctive: Siacoin is a native token on a Layer-1 PoW chain with no maximum supply cap. New SC is introduced via miner rewards and a Foundation block subsidy; the block reward dynamic shifted such that miners and the Foundation each receive an allocation (commonly referenced as 30,000 SC per block to miners and an additional 30,000 SC per block to the Foundation after subsidy changes), meaning the Foundation receives a substantial share of ongoing issuance to fund development and grants. Historical snapshots from the supplied data show total supply on the order of ~62.21 billion SC with circulating supply near ~56.02 billion SC at the time of the extract. The project’s distribution history includes a small pre-release mining of roughly ~30 million SC by developers (a vanishingly small fraction of total supply, approximately 0.048% by the supplied supply snapshot). Governance is foundation-led rather than an on-chain DAO: The Sia Foundation serves as the steward for protocol maintenance, upgrade coordination, grant administration, and community outreach. There is no documented on-chain token governance or formal DAO mechanism in the provided materials; decision-making and upgrade coordination are handled via the Foundation’s processes and community input channels. The network shows active development and community support, including ongoing grants, developer tooling, third-party analytics, and multiple explorer and infrastructure services, with an emphasis on sustainable funding via block subsidy to ensure long-term protocol development and ecosystem growth. Links - Website: https://sia.tech/ - Whitepaper: N/A - GitHub: https://github.com/SiaFoundation --- About the D-Score: BlockIndex.AI rates decentralization from 0 to 100 across node distribution, initial distribution, governance, age and history, and autonomy. Methodology: https://blockindex.ai/dscore