Sei Labs Publishes Whitepaper for Sei Giga: The First Multi-Proposer EVM Layer 1 Blockchain

New Design Delivers 5 Gigagas Throughput, Sub-400ms Finality, and 200K+ TPS for High-Performance EVM Applications

NEW YORK - May 19, 2025 - Sei Labs, the main contributor to Sei, the most performant Layer 1 (L1) blockchain, today published the Sei Giga whitepaper. This whitepaper charts the blockchain’s path to becoming the first multiproposer EVM L1. Leveraging parallel block proposals to solve bottlenecks, Sei Giga is designed to scale the EVM with performance-focused innovations in data availability, consensus, execution, and storage. 

By combining a high-performance consensus mechanism with an EVM execution client built from scratch, Sei Giga is engineered to overcome the limitations of traditional blockchain networks, offering significant improvements in transaction throughput, latency, and scalability. The key features of Sei Giga include:

• 5 gigagas throughput and ~200k transactions per second (TPS), optimized for scalable, high-performance applications.
• Sub-400ms finality: Fast transaction confirmation for low-latency, high-speed performance.
• EVM compatibility: Supports Ethereum smart contracts (Solidity, Vyper), allowing easy integration with Ethereum apps.
• Autobahn consensus protocol: Uses a multi-proposer architecture that enables parallel block proposals, enabling a 50x improvement in throughput
• New execution client: Rather than using reth or geth, Sei Giga uses an entirely new EVM client rebuilt from scratch, increasing performance and efficiency
• Async state commitments: Rather than generating a state commitment as part of consensus, Sei generates this asynchronously, removing it from the critical path

“Sei Giga is not just another EVM chain — it’s a reimagining of what’s possible for blockchain performance,” said Jay Jog, co-founder of Sei Labs. “By moving towards multi proposer consensus and rebuilding the execution environment from the ground up, we’re unlocking the scale and speed required for real-world, high-throughput applications — all while maintaining trust guarantees and ease of use of Ethereum.”

The Sei Giga upgrade introduces a completely redesigned architecture that enables over 50x throughput, 70x faster block production, and 40x execution efficiency, all while preserving the trust model of Proof-of-Stake and offering EVM compatibility. For developers, researchers, and applications seeking a blockchain that finally matches the performance needs of modern web applications, Sei Giga is the definitive step forward.

To read the full whitepaper, visit:
https://github.com/sei-protocol/sei-chain/blob/main/whitepaper/Sei_Giga.pdf

About Sei Labs

Sei Labs is a contributor to the open-source Sei blockchain, the fastest Layer 1. Sei's unique chain-level optimizations enable decentralized exchanges and trading apps to offer the best user experience with modern performance and scalability. The Sei Labs team is composed of industry veterans from Goldman Sachs, Databricks, Robinhood, Google, and Nvidia. Sei Labs has raised over $30M from top investors including Jump Crypto, Multicoin Capital, Coinbase Ventures, Distributed Global, Hudson River Trading, and Flow Traders.

To learn more about Sei, please visit https://www.sei.io/.