Umbra, Streamflow add private vesting on Solana

Umbra and Streamflow have rolled out a private token vesting feature on Solana intended to keep roughly $97 billion in 2025 token unlocks confidential. Vested tokens are delivered directly into Umbra privacy wallets while recipient details are masked onchain.

The integration relies on Arcium’s encrypted execution engine. Projects using Streamflow can keep time-based locks, price-triggered conditions and other distribution rules while encrypting the token transfers themselves. Each new vesting schedule is added to Umbra’s shared anonymity pool, which the companies say increases privacy for users and applications on the network.

The firms cited the scale of public unlocks in 2025 as a motivating factor. About $97 billion in tokens were released through vesting and unlock schedules that year, and most of those transfers remain visible and traceable onchain. Public unlocks reveal recipient wallets, release timing and allocation sizes, which can create front-running opportunities and information imbalances, the companies said.

Streamflow has committed to operating exclusively on Solana and supports more than 1.3 million users and more than 40,000 projects. The platform provides no-code tools for vesting, token locks, streaming, airdrops and staking. Streamflow will make the private vesting option available through two access tracks: a standard track with preferential default pricing for most teams and a custom track for higher-volume or specialized needs. The companies reported several high-volume client conversations are already active and additional partner announcements are forthcoming.

Umbra opened public access to its Solana privacy wallet in March. The project secured $155 million in ICO commitments on MetaDAO in October 2025, the companies noted.

Kru Shah, founder of Umbra, called the partnership “a landmark moment for the industry.” Malisha Stanojevic, chief executive of Streamflow, described onchain privacy as “the next frontier we need for further mainstream adoption.”

The companies said the private vesting feature preserves the controls projects expect-scheduled releases and conditional triggers-while encrypting who receives tokens and the onchain timing observers would otherwise see. They described the integration as a protocol-level privacy tool for token distribution on Solana and said further details on client rollouts will be announced.