Layer 1 vs Layer 2 Scaling

Last reviewed: October 6, 2026

By TetherWiki Editor (pen name) · Editorial policy

Layer 1 vs Layer 2 Scaling refers to two distinct approaches to improving the scalability of blockchain networks. Layer 1 involves changes to the base protocol of a blockchain to increase its capacity, while Layer 2 involves building secondary frameworks or protocols on top of the existing blockchain to handle transactions more efficiently. As of October 2023, these scaling solutions are critical for addressing the growing demand for blockchain applications and ensuring that networks can handle increased transaction volumes without compromising speed or cost.

Overview

Layer 1 Scaling refers to modifications made directly to the base layer of a blockchain network. This includes changes such as increasing the block size or altering the consensus algorithm. These changes aim to enhance the network's throughput and efficiency. Layer 2 Scaling, on the other hand, involves offloading transactions from the main blockchain to secondary layers. These secondary layers process transactions separately and then report back to the main chain, reducing congestion and improving transaction speeds. Both approaches have their advantages and challenges, and they are often used in conjunction to maximize scalability.

Feature comparison

Feature	Layer 1 Scaling	Layer 2 Scaling
Definition	Changes to the base blockchain protocol	Secondary protocols built on top of the blockchain
Examples	Increasing block size, changing consensus algorithms	State channels, sidechains, rollups
Transaction Speed	Improved by protocol enhancements	Significantly increased by offloading transactions
Security	Directly inherits blockchain's security	Varies; often relies on main chain for finality
Complexity	Requires consensus among network participants	Can be implemented independently of the main chain
Adoption	Slower due to need for network-wide upgrades	Faster as it doesn't require changes to the main chain

Key differences

Layer 1 Scaling focuses on enhancing the blockchain's core protocol. This can involve increasing the block size, which allows more transactions to be included in each block, or changing the consensus mechanism, such as moving from Proof of Work (PoW) to Proof of Stake (PoS). These changes require consensus among all network participants, making them more challenging to implement.

Layer 2 Scaling involves solutions like state channels, sidechains, and rollups. State channels allow participants to transact off-chain, only settling on the main chain when necessary. Sidechains are separate blockchains that run parallel to the main chain, handling transactions independently. Rollups batch multiple transactions into a single transaction that is then recorded on the main chain, reducing the load on the blockchain.

Use cases

Layer 1 Scaling is often used in networks that require fundamental changes to improve performance. For example, Bitcoin has explored increasing block sizes to handle more transactions per block. Ethereum's transition to Ethereum 2.0 involves moving to a PoS consensus to enhance scalability and energy efficiency.

Layer 2 Scaling is widely used in decentralized finance (DeFi) and other applications requiring high throughput. Solutions like rollups are popular in the Ethereum ecosystem, as they allow for faster and cheaper transactions without altering the main chain. Rollup-centric Ethereum scaling is a prime example of Layer 2's effectiveness in handling large transaction volumes.

Market data

As of October 2023, the adoption of Layer 2 solutions has increased significantly, driven by the need for scalable and cost-effective transaction processing. The launch of Optimism Layer 2 and similar projects has demonstrated the potential of Layer 2 to enhance blockchain performance. Market data indicates that Layer 2 solutions have reduced transaction fees and increased throughput, making them attractive for developers and users alike.

Sources