Solana-based privacy protocol Umbra has partnered with token distribution platform Streamflow to offer private token vesting and shielded distributions for projects building on the network. The tie-up, announced Tuesday, combines Umbra's encryption tools with Streamflow's infrastructure for managing token unlocks and airdrops.
What the partnership delivers
Under the integration, projects using Streamflow can now wrap their vesting schedules and distribution events in Umbra's privacy layer. That means token allocations — to team members, investors, or community recipients — are obscured on-chain. The amounts, schedules, and recipient identities are shielded from public view while still being verifiable by the parties involved.
Umbra's system uses cryptographic commitments and zero-knowledge proofs to hide transfer details on Solana's public ledger. Streamflow handles the scheduling logic: linear vesting, cliff unlocks, and bulk airdrops. Combined, the two let a project issue tokens without revealing who gets what or when.
Why Solana projects want it
Public vesting schedules have been a pain point for crypto teams. Competitors can see exactly when large unlocks happen, and retail traders often front-run those events. Shielded distributions also protect early backers and employees from targeted phishing or social engineering attacks that rely on knowing their wallet addresses.
For Solana specifically, the partnership brings a privacy feature that has been more common on Ethereum via tools like Aztec or Tornado Cash. Umbra's co-founder said in a statement that the integration aims to give Solana projects the same kind of optional privacy without sacrificing the network's speed.
Streamflow's role in the ecosystem
Streamflow is already a go-to platform for Solana teams that need automated token vesting. It manages over $2 billion in locked tokens across hundreds of projects, according to the company. By adding Umbra's privacy layer, Streamflow is trying to differentiate itself from rivals like Sablier or Huma Finance that focus on other chains.
The teams behind both protocols are Solana-native. Umbra launched in 2022 as a privacy-focused transfer tool and has since expanded into shielded swaps and now vesting. Streamflow started in 2021 and has become a standard piece of infrastructure for new token launches on Solana.
The integrated product is available now for any Solana project using Streamflow. Umbra and Streamflow say they plan to release open-source code and documentation for the integration in the coming weeks, allowing other developers to build on top of it. Whether the feature attracts a significant number of projects — or faces regulatory scrutiny for obscuring token allocations — remains an open question for the teams involved.
