The Nil Foundation, which helps Layer 1 and Layer 2 blockchains and protocols generate zero-knowledge proofs, raised $22M led by Polychain at a $220M valuation
Kari McMahon / The Block :
Context & Ripple Effects
The Nil Foundation's $22M Polychain-led round lands in a proving market that was already consolidating around specialists: Succinct had raised $55M across seed and Series A for zero-knowledge proof tech, and Nexus Labs followed with a $25M Series A co-led by Lightspeed and Pantera. Nil's angle is selling proof generation itself to Layer 1 and Layer 2 chains rather than building apps on top.
The raise also extends a broader pattern from the related coverage: dedicated infrastructure layers each attracting their own large rounds — LayerZero's $135M interoperability raise in 2022, and later DoubleZero's $28M token round for a dedicated fiber network. Proving is now being capitalized as its own layer of that stack.
First-order effects
- Nil gains the balance sheet to scale proof generation as a service for L1/L2 clients, with Polychain holding a position at a $220M valuation.
- Chains and protocols evaluating zero-knowledge features now have a third well-funded external provider alongside Succinct and Nexus Labs instead of building proof systems in-house.
Second-order effects
- Succinct and Nexus Labs face direct competition for the same outsourced-proving budgets, pushing the category toward per-proof pricing and performance benchmarks rather than bespoke integrations.
- L1 and L2 teams can defer cryptography hiring, shifting spend from internal engineering to purchased proofs — a cost-structure change for every chain weighing a zk roadmap.
Third-order effects
- If the specialist model holds, zero-knowledge proving becomes a commodity utility layer — like interoperability messaging and dedicated bandwidth before it — with chains renting proofs the way they rent block space.
- That structure concentrates leverage with a handful of proving providers, making their reliability and pricing a systemic dependency for any chain whose security or scaling claims rest on zk tech.
The trend: Blockchain infrastructure is splitting into separately capitalized service layers — interoperability, bandwidth, and now proof generation — each with its own venture-backed specialists.