Cardano has introduced Leios, a transformative protocol upgrade that marks the culmination of eight years of research and aims to dramatically enhance network speed and stability. This next-generation architecture features a sophisticated multi-tier block structure—comprising input, sorting, and backup blocks—that could position Cardano as a leader in blockchain performance.
Initial simulations suggest Leios may be capable of processing tens of thousands of transactions per second (TPS), setting the stage for Cardano to directly challenge Solana, which boasts theoretical peaks of 65,000 TPS but continues to struggle with network outages and reliability issues.
In comparison, the current blockchain landscape highlights significant disparities in performance. Ethereum’s base layer handles only 15–30 TPS, while Avalanche claims up to 4,500 TPS in lab conditions, although these speeds are rarely observed in real-world scenarios.
A standout feature of Leios is its adaptable “tick-tock” deployment framework, allowing for a cautious initial rollout with the flexibility to scale performance through ongoing optimizations. This gradual implementation is designed to avoid the technical pitfalls and instability that have hampered other high-throughput networks.
Leios is part of a broader evolution within the Cardano ecosystem, working alongside technologies such as Hydra, Mithril, and the upcoming Starstream rollups. These tools collectively aim to support a wide array of use cases, from decentralized finance (DeFi) to AI-powered applications.
Development is advancing under a global “follow-the-sun” model, with multiple teams working across time zones to accelerate progress. The current timeline projects completion of Leios by late 2025, with full deployment expected in 2026.
Cardano founder Charles Hoskinson, of Input Output Global (IOG), describes Leios as a step beyond speed. “Leios represents a blockchain designed for global scale,” he explains, “without sacrificing the core principles of decentralization and security that define true cryptocurrencies.”
