Primeblock Capital leads early-stage rounds blockchain businesses. Operator-led, research-literate, and deliberately small — we back fewer projects, hold longer, and show up on the hardest quarters.
We write first checks into companies the consensus has not yet learned to name.
We have made the firm deliberately small. Five partners, twelve investments a year, one thesis held across four funds. The constraint is the product: founders get the same people who signed the term sheet, in the hardest weeks, for as long as it takes.
The enduring projects of this decade will fuse technical depth with operational rigor. Our capital concentrates on three convictions — durable infrastructure, the re-architecture of regulated blockchain industries, and the uncommon teams that sit at their intersection.
A cross-section of founders building quietly compounding projects across artificial intelligence, prediction market, AI agent, data analysis and GameFi.
One-line description of what they do.
“Catalyst led our pre-seed on the strength of a prototype and a thesis most investors would not take the time to hear. Four years later, they are still the first call on every hard decision.”
A short, deliberate process — designed so every company we back gets a partner from day one to day one thousand.
Two hundred first-look conversations a year — through the operator network we built long before Catalyst existed. No cold pipeline.
Deep diligence by the partners themselves. One of us runs the memo, another runs the anti-memo. No associates writing on our behalf.
$1M – $5M first checks, lead or co-lead. Terms plain, board seat optional, follow-on reserved at fund construction.
We take on fewer than twelve new investments a year so we can actually show up — hiring, GTM, introductions, the hardest weeks.
Our partners have founded, scaled, and exited companies in the markets we now invest in. We show up where founders need us most — and get out of the way the rest of the time.
The questions founders and prospective LPs ask us most. If yours is not here, email the partnership directly.
Pre-seed and seed founders building infrastructure software, financial systems, healthcare, or the energy transition. We are domain-specific but stage-flexible — if you are raising a first check of $1–5M, we are the right conversation.
Initial checks of $1M to $5M, typically leading or co-leading the round. We target 8–12% ownership at entry and reserve meaningful follow-on at fund construction to participate through Series B.
Our aim is two weeks from first meeting to a term sheet or a clear no. One partner runs the memo, another runs the anti-memo — no associate screens, no hidden committee.
Optional. We take a board seat where it is useful, and an observer or informal role where it is not. We are operators first and allergic to governance theater.
Fewer than twelve new investments a year. By choice. It is the only way to keep the commitment we make to every founder we back.
Headquartered in San Francisco with partners in New York and London. We meet in person within a week of serious conversations — distance has never been the reason a deal did not happen.
We read every inbound. Share a deck and a short note about what you are building — we aim to respond within three business days.
Decisions from the partnership within three business days — including a pass.
