Amrit Kumar is a computer scientist and blockchain entrepreneur best known as the co-founder and President of Stacks, a Bitcoin layer that brings smart contracts and decentralized applications to Bitcoin. Alongside his operating role at Stacks, Kumar is active as an angel investor in the Web3 and blockchain infrastructure space, backing early-stage projects that align with his technical focus on decentralized systems.
Kumar holds a PhD in computer science from Université Grenoble Alpes in France, where his research centered on cryptography and distributed systems. He co-founded Blockstack PBC – later rebranded Stacks – together with Muneeb Ali around 2017. The project raised capital through one of the first SEC-qualified token offerings in the United States, a milestone that drew significant attention from both regulators and institutional investors. Kumar's technical depth in cryptography and his early navigation of regulatory frameworks in the US distinguish him from most angel investors operating purely as capital allocators.
His angel activity reflects a preference for infrastructure and protocol-level projects rather than consumer applications. Public information about the specific names and deal sizes of his six portfolio investments is limited, and no comprehensive disclosure exists on platforms such as Crunchbase or LinkedIn at the time of writing.
Notable investments
Public information about Kumar's individual angel investments is limited. His broader affiliation with the Stacks ecosystem suggests exposure to Bitcoin-adjacent projects, Layer 2 infrastructure, and DeFi protocols built on or settling to Bitcoin. No verified list of specific portfolio companies is publicly available beyond his primary role at Stacks.
Team
Kumar operates as an individual angel investor rather than through a named fund. His primary professional identity remains tied to Stacks, where he serves as President. He has spoken at major blockchain conferences including Consensus and various Bitcoin-focused events, and has published technical research on smart contract security and blockchain scalability.
Recent activity
In recent years, the Stacks ecosystem – and by extension Kumar's sphere of influence – has grown around the "Bitcoin Renaissance" narrative, with rising developer interest in Bitcoin DeFi and ordinals-adjacent infrastructure. Kumar has been vocal about Bitcoin as a settlement layer for Web3, a position that shapes his investment thesis. Specific recent deals or new portfolio additions since 2025 are not confirmed in public sources.
Kumar represents a relatively rare profile in crypto angel investing: a credentialed cryptographer who built and scaled a live protocol before turning to early-stage backing. His technical background at Stacks gives him strong signal on infrastructure quality, though the full scope of his angel portfolio remains undisclosed. Investors and founders seeking his involvement likely gain both capital and protocol-level technical review.
