1. Optimism (OP)

Optimism is an Ethereum Layer 2 scaling solution that leverages optimistic rollups to increase the scalability and efficiency of the Ethereum network. Rollups bundle multiple transactions into a single transaction that can be processed on the Ethereum mainchain, reducing the load on the mainchain and allowing for faster and cheaper transactions.

Optimism is considered one of the most promising Layer 2 solutions on Ethereum due to its strong security, support for smart contracts, and vibrant DeFi ecosystem. With over $1 billion in value locked on the network, Optimism boasts the largest and most active DeFi ecosystem among Layer 2 solutions on Ethereum. The L2 also has a network upgrade coming in Q1 2023 called Optimism Bedrock that is expected to greatly boost performance and make it the most scalable Layer 2 on ETH.

Optimism Layer 2

2. Polygon (MATIC)

Polygon is an open-source Layer 2 scaling solution for Ethereum that aims to address the scalability and high cost challenges faced by the Ethereum network. It utilizes a network of Ethereum-compatible PoS (Proof-of-Stake) sidechains that can process transactions in parallel with the Ethereum mainchain, thereby reducing the load on the mainchain and enabling faster and cheaper transactions.

Polygon's technology and focus on scalability and security have made it a promising player in the Layer 2 space for Ethereum with over 37,000 applications on the platform. Its Ethereum compatibility and ability to process transactions faster and at a lower cost have attracted top brands such as Nike, Stripe, Adidas, and Starbucks to build on the platform. Polygon is currently the 5th largest chain by TVL with over $1.2 billion in assets locked on the platform.

Polygon L2


METIS is a relatively new layer 2 that was a fork of the Optimism codebase and is focused on building an ecosystem of decentralized finance applications. Although only launching in late 2022, it has amassed over $148 million in total value locked, making it one of the fastest growing layer 2 rollups on Ethereum.

METIS’ primary feature is its ability to offer high-speed transactions and low fees that are anchored to the Ethereum mainchain. This makes it an ideal platform for DeFi applications such as lending, decentralized exchanges, and synthetic assets. The network also has a staking program with rewards of up to 11% APY for users who hold the METIS token.


4. Loopring (LRC)

Loopring (LRC) is a protocol for building decentralized exchanges on Ethereum, and it can also be considered an Ethereum Layer 2 solution. The Loopring protocol operates on top of the Ethereum main chain (Layer 1) to enable fast and cheap trades while still leveraging the security and decentralization of the Ethereum network.

By using off-chain order books and on-chain settlement, Loopring reduces the amount of data that needs to be processed on the Ethereum main chain, making trades faster and cheaper. The protocol uses LRC as its native token for various purposes, including paying trading fees, rewarding liquidity providers, and participating in governance decisions. The Loopring network is one of the largest Layer 2's with over $120 million in value locked on the network according to the L2Beat platform.


5. Immutable X (IMX)

Immutable X is a decentralized exchange platform for buying, selling, and trading non-fungible tokens (NFTs) built on top of the Ethereum network. As a Layer 2 scaling solution, it offloads the processing of transactions from the Ethereum main chain to a separate layer, which helps reduce the strain on the Ethereum network and improve its scalability.

In terms of Web 3 gaming, Immutable X provides a solution for the increasing demand for NFTs in gaming and other applications, as it offers fast and secure trading of NFTs, which is critical for creating a seamless user experience in a gaming environment. Additionally, the use of blockchain technology on Immutable X ensures that NFT ownership is transparent and cannot be manipulated, providing a fair and trustworthy gaming environment.

Immutable X Layer 2

What is a Layer 2 Blockchain?

A Layer 2 blockchain is a scaling solution that operates on top of an existing blockchain network to improve its scalability and performance. It enables off-chain transactions and data processing while still relying on the security of the underlying blockchain network.

In a typical blockchain network, all transactions are recorded on the main blockchain, which can lead to scalability issues as the network grows. A layer 2 solution aims to alleviate this strain by taking some of the transactions and data processing off the main blockchain and onto a separate, parallel layer. This reduces the amount of data that needs to be processed on the main blockchain, allowing for faster and more efficient transactions.

Layer 2 solutions can take different forms, such as state channels, plasma chains, and sidechains, but they all aim to provide a more efficient and scalable solution for blockchain transactions.

Is Solana a Layer 2?

No, Solana is not a Layer 2 solution. Solana is a high-performance blockchain network in its own right, designed to provide a scalable and efficient platform for decentralized applications. It uses a unique consensus mechanism called Proof of History, which helps to speed up transactions and reduces the cost of transactions on the network.

While Solana is not a Layer 2 solution, it can still be used as a scaling solution for other blockchain networks. For example, projects can use Solana as a layer for hosting decentralized applications, which can help to offload some of the processing and data storage from the main blockchain network, thus improving its scalability and performance.

Bottom Line

In conclusion, Layer 2 solutions provide an innovative solution for scalability in blockchain networks, particularly in the Ethereum ecosystem. The 5 best Layer 2 solutions outlined in this blog post are Optimism (OP), Polygon (MATIC), METIS (METIS), Loopring (LRC), and Immutable X (IMX). Optimism is a strong player with a large DeFi ecosystem, Polygon focuses on scalability and security, METIS is a fast-growing DeFi platform, Loopring is a decentralized exchange protocol, and Immutable X is a platform for NFT trading.

These Layer 2 solutions improve scalability by processing off-chain transactions, reducing the load on the mainchain and providing faster and cheaper transactions while retaining security.