Subzero Labs (Rialo) raised $20M funding round

August 1, 2025

Startup building internet-scale blockchain Subzero Labs (Rialo) raised $20M in a funding round led by Pantera Capital, with participation from Coinbase Ventures, Fabric Ventures, Mysten Labs, SIG DTI (a Susquehanna International Group Company), Variant Fund.

Subzero Labs is developing Rialo, a developer-first Layer 1 blockchain built for internet-scale decentralized applications. Combining RISC-V smart contracts, Solana VM compatibility, and native web connectivity, Rialo delivers Web2-like responsiveness with event-driven execution and built-in privacy. It aims to simplify blockchain development for real-world use cases like AI agents and prediction markets. Designed for scale, speed, and ease of use, Rialo reduces friction for builders while enabling highly interactive, scalable dApps.

You can find all funding rounds, links, and details on the project page Subzero Labs (Rialo)