Lightspeed Harmonic Fires Back in Solana’s Block Building Wars | Ben Coverston
Mar 17, 2026
Ben Coverston, CEO of Harmonic and co-founder of Temporal, brings a quant trading background to crypto. He dives into Solana block building and Harmonic’s multi-builder, microblock technical design. Conversation covers transaction scheduling, market structure debates, decentralization tradeoffs, MCP/Alpenglow protocol ideas, and how these changes could reshape DeFi ordering and competition.
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How Fast Solana Lured A TradFi Quant Into DeFi
- Ben transitioned from math/CS and TradFi internships to becoming a DeFi power user after early 2021 Solana speed experiences.
- He recounts seeing HFT firms interact with DeFi and fast Solana transactions that convinced him DeFi markets were possible.
Open Infrastructure And APIs Prevent Centralized Gatekeeping
- Keep infrastructure open and transparent: Harmonic exposes bundles and aims to remove rate limits and add APIs for visibility.
- Ben emphasizes revert protection and open TPUs so apps can send unlimited transactions without central gatekeeping.
Harmonic Exists To Stop A Single Sequencer Monopoly
- Harmonic was built to prevent a single block-builder monopoly and preserve open, competitive sequencing on Solana.
- Ben says monopolies would turn Solana into a centralized exchange and squeeze fees, so Harmonic prioritizes decentralization and validator choice.