Harmonic, a startup focused on Solana infrastructure, has successfully secured $6 million in seed funding, with Paradigm leading the round. The funding also includes contributions from key Solana stakeholders, though details about the investors and business model remain undisclosed.
Harmonic is pioneering Solana’s first open block-building system, enabling validators to source blocks from multiple builders in real-time, enhancing the network’s speed and efficiency. Unlike Solana’s current architecture, which assigns block-building to one validator at a time, Harmonic introduces a coordinated aggregation layer. This system routes builder proposals to validators, creating a competitive marketplace similar to high-frequency trading.
Harmonic’s co-founder, Jakob Povšič, likens the system to Nasdaq’s block routing, aiming to bring Solana closer to achieving one million transactions per second. The infrastructure supports upcoming network upgrades and enhances Solana’s competitiveness against centralized exchanges.
Leading ecosystem participants have already adopted Harmonic’s system, though specific names were not disclosed. Harmonic’s team, based in New York City, consists of around 10 members, with no current comments on future hiring plans.

