List of the Top 3 Layer 2 Protocols for Caldera in 2025

The latest advancements in layer 2 solutions for Ethereum dApps empower developers to leverage their preferred tools while effectively reducing the expenses associated with scaling their applications. Within this framework, an aggregator functions similarly to a node on Ethereum, allowing client software to execute remote procedure calls (RPCs) through a standardized API to interact with an Arbitrum chain. This aggregator plays a crucial role by transmitting these calls to the EthBridge and returning the results of transactions to the client, reflecting the behavior of a conventional Ethereum node. Although it's common for clients to route their transactions through an aggregator when engaging with an Arbitrum chain, this is not strictly necessary. The architecture permits an unlimited number of aggregators to be created, and there are no restrictions on who can act as an aggregator. To optimize processing efficiency, aggregators often merge several client transactions into a single submission to the Arbitrum chain. Moreover, the Arbitrum ecosystem includes a specialized Sequencer capable of organizing transactions, which leads to rapid transaction confirmations with minimal latency. This groundbreaking arrangement not only enhances overall throughput but also cultivates an adaptable environment where developers can explore and innovate without the constraints of high costs, ultimately promoting greater experimentation within the blockchain space. By providing such flexibility, layer 2 solutions are poised to significantly transform the landscape of decentralized applications.

Ethereum's new scalability framework guarantees swift transactions and effective smart contract execution. Optimism functions as a Public Benefit Corporation (PBC), which is designed to generate profits while also delivering societal benefits through responsible and sustainable methodologies. This organizational model requires us to balance our shareholders' financial interests with the well-being of those affected by our decisions, adhering to a defined "public benefit charter." The primary goal of the Company is to enhance and protect fair access to public goods on the internet by developing open-source software. This charter reflects our dedication to the Ethereum community, as we work to uphold its core values by building infrastructure that supports the growth and sustainability of a public goods ecosystem. By doing so, we not only seek to advance technological progress but also to promote an inclusive atmosphere where all users can thrive. Ultimately, our efforts aim to bridge the gap between innovation and accessibility, ensuring that the benefits of technology are shared widely.

zkSync emerges as the leading user-centric ZK rollup solution within the Ethereum landscape. This cutting-edge scaling technique is unparalleled in its ability to securely handle unlimited volume on Layer 2, distinguishing it from alternative approaches. Unlike optimistic rollups, zkSync enables swift and cost-effective asset transfers between the ZK rollup and Layer 1. It's worth noting that zkSync offers the most affordable transaction fees among all existing and upcoming rollups. Moreover, it includes functionalities such as meta-transactions, instant confirmations with economic finality, and economical privacy solutions. The philosophy driving zkSync's design prioritizes both simplicity and a pleasurable development experience. Developers can seamlessly incorporate payment systems and atomic swaps with minimal coding effort. Additionally, zkSync supports the development of type-safe, functional smart contracts using Zinc, a Rust-based framework, while also allowing the deployment of existing EVM codebases with slight modifications. This impressive array of features positions zkSync as a compelling option for developers who are eager to achieve both efficiency and innovation in their blockchain projects, ultimately fostering a more accessible environment for blockchain advancement.