Points of Focus

• Umbra and Streamflow launched private token vesting on Solana, hiding recipient addresses, allocation sizes, and unlock schedules.
• The integration uses Arcium’s encrypted execution engine while preserving Streamflow’s existing vesting features.
• The launch targets a token unlock market that saw roughly $97 billion distributed through vesting schedules in 2025.

Crypto projects on Solana can now distribute vested tokens without exposing recipient wallets or allocation details onchain after privacy protocol Umbra integrated with token distribution platform Streamflow.

The partnership, announced on May 26, combines Streamflow’s vesting infrastructure with Umbra’s privacy layer, allowing teams to continue using time-based locks, price-triggered releases, and other token distribution tools while keeping the underlying transfers confidential. The launch targets a longstanding feature of public blockchains where vesting contracts expose recipient addresses, allocation sizes, and unlock schedules to anyone monitoring onchain activity.

Streamflow is partnering with @UmbraPrivacy to bring private vesting to @solana 

Token vesting is one of the largest distribution mechanisms in crypto, yet nearly all of it has been fully public and traceable until now.

Together, we’re giving projects a new way to distribute… pic.twitter.com/UhvxkeAJUk

— Streamflow (@streamflow_fi) May 26, 2026

Private token vesting comes to Solana projects

Under the integration, vested tokens are delivered to Umbra wallets through infrastructure powered by Arcium’s encrypted execution engine. According to the companies, recipient identities, allocation amounts, and vesting schedules remain hidden from public blockchain observers while projects retain access to Streamflow’s existing distribution framework.

Streamflow is one of the largest token distribution providers on Solana, reporting more than 1.3 million users and over 40,000 projects using its platform. The company offers vesting contracts, token locks, airdrops, staking tools, and other token management services.

The companies said clients will be able to access the feature through a standard service tier and a separate track for higher-volume or specialized requirements. Several enterprise-level discussions are already underway, according to the announcement.

Why public token unlocks have become a market concern

Token vesting remains one of the most common methods crypto projects use to distribute tokens to founders, contributors, investors, and community members over time. Yet the process has historically been fully transparent.

Umbra and Streamflow estimate that about $97 billion worth of tokens moved through vesting and unlock schedules during 2025, with most distributions visible on public blockchains.

Public unlock schedules can influence market behavior. Traders often track upcoming token releases to position ahead of potential supply increases, while publicly identifiable recipient wallets may become targets for phishing campaigns and social engineering attempts. The system keeps vesting rules enforceable onchain while limiting public access to recipient and allocation data.

The launch also highlights a trade-off between privacy and transparency. Public vesting schedules give investors and analysts visibility into future token supply, information that some market participants use when assessing dilution risks and token economics.

For Umbra, the launch extends its product offering beyond private transfers and wallets into token distribution. For Streamflow, the integration adds confidential vesting to a platform that reports more than 1.3 million users and over 40,000 projects, bringing privacy-focused distribution tools to a segment that processed roughly $97 billion in token unlocks during 2025.