Arcium launches privacy-preserving Mainnet Alpha on Solana as Umbra debuts shielded finance layer

Arcium has launched its Mainnet Alpha on Solana, marking the transition of its encrypted computation network from a testing environment to live infrastructure intended for early production use.

The release introduces what Arcium describes as a new design space for privacy-preserving applications, with Umbra debuting as the first protocol to go live on the network.

The project positions the launch as a step toward powering encrypted capital markets on public blockchains. In a statement shared with The Block, Arcium said the default transparency of blockchains has created persistent barriers to institutional adoption, particularly in financial markets, where public transaction data can expose sensitive information and pose security and competitive risks.

Building encrypted capital markets

Arcium operates as a decentralized network for trustless computation over fully encrypted data. Using its encrypted execution engine, developers can build applications that remain private while still being verifiable and composable on public blockchains, spanning use cases from confidential DeFi to privacy-preserving AI. The infrastructure is designed to allow trading, lending, and issuance to operate with cryptographic privacy rather than full onchain visibility.

"Arcium ensures that privacy is no longer a niche feature but a broad design primitive," CEO Yannik Schrade said. He added that the network aims to move beyond privacy as simply hiding data by introducing a general-purpose encrypted supercomputer, starting with encrypted capital markets on Solana.

An 'incognito mode' for moving assets

Umbra's deployment marks the first live application of that framework. The Arcium-powered protocol is launching its Private Mainnet, activating shielded transfers and encrypted swaps through what it describes as a shielded financial layer for Solana. Access will roll out gradually, onboarding 100 users per week under a $500 deposit limit before broader access and higher limits are introduced in February, according to the team.

"Finance is deeply personal, yet onchain, it's always been public by default," Umbra co-founder Kru Shah said, adding that the launch is intended to give users an "incognito mode" for moving assets, framing it as a step toward stronger user sovereignty on Solana.

Meanwhile, the Mainnet Alpha launch builds on prior development and funding milestones for Arcium. The project previously raised $5.5 million in a strategic round led by Greenfield Capital in 2024 to develop its confidential computing network, bringing total funding at the time to $9 million. Arcium was founded by the team behind Elusiv, a zero-knowledge privacy protocol built on Solana, and later expanded its focus toward verifiable encrypted computation for decentralized applications.

Umbra has emerged as one of the most prominent applications in that ecosystem. In October, the protocol secured nearly $155 million in ICO commitments via MetaDAO, one of the largest raises on the platform, a sign of growing demand for privacy-focused infrastructure on Solana. 

Arcium said developer activity has increased significantly since its testnet launch in May 2025, with additional projects such as Melee, Vanish, and Anonmesh building integrations, while Confidential SPL is nearing completion to enable confidential tokens directly on Solana.

Arcium's roadmap toward full mainnet includes the introduction of staking, slashing mechanisms tied to key recovery, and a decentralized lightweight node role aimed at expanding operator participation across the network.