Umbra and Streamflow have launched private token vesting on Solana, allowing projects to vest and distribute tokens confidentially at scale, the companies told The Block exclusively.
Powered by Arcium's encrypted execution engine, the integration lets Streamflow clients keep access to the platform's time-based locks, price-based conditions, and other distribution mechanisms while keeping the actual token transfers private.
Recipients receive vested tokens directly into Umbra wallets, with each new vesting schedule contributing to Umbra's shared anonymity pool — strengthening privacy for all users and applications building on the network. "A landmark moment for the industry," Kru Shah, founder of Umbra, said of the partnership.
The case for private vesting is arguably structural.
Token vesting is usually the primary mechanism crypto projects use to align incentives with teams, investors, and communities.
In 2025 alone, roughly $97 billion in tokens were released through vesting and unlock schedules, nearly all of them fully public and traceable onchain, the teams said.
Such transparency ultimately exposes recipient wallets, unlock timelines, and allocation sizes to anyone watching the chain, which can create front-running opportunities and informational asymmetries that projects have historically had limited protocol-level tools to prevent.
Streamflow, which recently committed to operating exclusively on Solana, serves more than 1.3 million users and over 40,000 projects as the chain's leading token distribution platform, offering no-code tools for vesting, token locks, streaming, airdrops, and staking.
Clients can access the integration through two tracks on Streamflow, including a standard track offering preferential default pricing for most teams, and a custom track for higher-volume or specialized requirements.
Several high-volume conversations are already active, with further announcements expected, the companies said. "Onchain privacy is the next frontier we need for further mainstream adoption," Malisha Stanojevic, CEO of Streamflow, said.
Umbra (UMBRA) launched public access to its Solana privacy wallet in March and raised $155 million in ICO commitments on MetaDAO in October 2025, reportedly making it one of the most successful raises on the platform.
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