Suji Yan is a Chinese entrepreneur and angel investor best known as the founder and CEO of Mask Network (originally launched as Maskbook in 2019). Mask Network is an open-source browser extension and protocol that lets users post encrypted messages, send crypto assets, and interact with decentralized applications directly through mainstream social platforms such as Twitter/X and Facebook – without leaving those platforms. His work sits at the intersection of social media and Web3 infrastructure, and his investment thesis as an angel broadly follows that same direction: privacy-preserving technology, decentralized identity, and Ethereum-adjacent tooling.
Yan studied at the University of Pennsylvania and has been active in the Ethereum developer community since the early 2020s. He is based primarily between Shanghai and San Francisco. Mask Network raised early backing from a16z crypto, HashKey Capital, and other Web3-focused funds. In February 2021 Mask Network launched its $MASK token via an Initial Twitter Offering (ITO) on Uniswap, distributing tokens directly to Twitter users in a format that demonstrated the product's own capabilities. The launch received significant attention as an early proof-of-concept for on-chain distribution via social layers.
Public information about Yan's personal angel portfolio is limited. He has publicly signaled support for projects in the decentralized social, DID (decentralized identity), and privacy tooling categories, consistent with Mask Network's ecosystem direction. He is known to be active in the broader Ethereum Foundation-adjacent community and has participated in hackathons and developer events in Asia and Europe.
Notable Investments
Public information about Suji Yan's specific angel deal portfolio is limited. The following associations are documented or widely reported, but deal sizes and ownership stakes have not been publicly disclosed:
- Mask Network / Next.ID – Yan's own venture; Next.ID is a spin-out DID aggregation protocol developed within the Mask ecosystem
- Various Ethereum L2 and DeSoc projects – Yan has publicly expressed support for decentralized social (DeSoc) initiatives, including work aligned with Farcaster and Lens Protocol ecosystems, though formal investment terms are not confirmed
- Web3 developer tooling – through Mask Network's ecosystem grant program, Yan has channeled early-stage support to browser-extension and wallet UX projects
Specific deal names, co-investors, and round sizes for his personal angel activity have not been disclosed in public filings or verified press coverage as of early 2026.
Team
Suji Yan operates primarily as a solo angel, deploying capital alongside his role as CEO of Mask Network. He works closely with the Mask Network core team, which includes engineers and protocol researchers based in Asia and Europe. No formal venture fund structure with named managing partners has been publicly announced.
Recent Activity
In 2024 and into 2025, Yan continued to focus Mask Network's development on the Next.ID decentralized identity layer and integrations with emerging decentralized social platforms. He has been vocal on X (formerly Twitter) about Ethereum's roadmap and the intersection of social media censorship and Web3 alternatives. He has participated in Devcon and EthGlobal events as a speaker and mentor, reinforcing his presence as an ecosystem builder rather than a purely financial investor.
Yan's profile as an angel investor remains relatively niche – he is better understood as a founder-operator who makes selective bets in areas directly adjacent to his own product work. Builders in the decentralized social, browser-extension Web3 tooling, and Asian crypto markets are the most likely beneficiaries of his attention. Public information about total AUM, fund structure, and the full scope of his personal portfolio is limited; anyone seeking to engage him as an investor should rely on direct outreach or conference introductions rather than public deal databases.
