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Guides and Overviews

Learn about core web3 development concepts including Ethereum, layer 2s, testnets, blockchain developer tools and more!

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2 blockchains stacked on top of each other

What Are Layer 2 Blockchains?

Layer 2October 7, 2025
Starknet logo

ZK-Rollup Projects: A Complete Guide

Layer 2May 20, 2025
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Rollup-as-a-Service Provider Comparison: How to Choose the Right RaaS Partner

Layer 2June 13, 2024
A graph of zkSync Era TVL

What is ZKsync Era? An Overview For Ethereum Developers

Layer 2May 9, 2024
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What are Rollups-as-a-service (RaaS)?

Layer 2August 23, 2023
The architecture of an optimistic rollup 

How Do Optimistic Rollups Work (The Complete Guide)

Layer 2August 9, 2023
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How to Start Developing on zkSync (2025)

Layer 2May 5, 2023
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Optimism Bedrock Testnet Migration Guide

Layer 2January 12, 2023
How Arbitrum works

How to Start Developing on Arbitrum

Layer 2October 19, 2022
The data in green, as well as the batch depicted above, are sufficient to verify a post-state root. (Source: Vitalik's Blog)

Validity (ZK) Proofs vs. Fraud Proofs

Layer 2October 19, 2022
Alchemy developer platform dashboard.

Which Optimism node is best? Public vs. Private vs. Self-Hosted

Layer 2September 6, 2022
The Address Activity screen, showing the information needed to test and create a webhook

How to Create Arbitrum Webhooks

Layer 2August 11, 2022
Create an API Key on Alchemy dashboard

How to Use Webhooks on Optimism

Layer 2August 11, 2022
Overview post cover image

What is an application-specific blockchain (appchain)?

Layer 2August 10, 2022
A description of different layers in a modular blockchain stack. Source: Celestia

Modular vs. Monolithic Blockchains

Layer 2July 8, 2022
Layer 2 block chains are on top of an existing blockchain and are designed to help scale the Layer 1 chain.

What is the Optimistic Virtual Machine (OVM)?

Layer 2July 1, 2022
A diagram showing how programs are executed in the Ethereum Virtual Machine (EVM).

What is a zkEVM?

Layer 2June 21, 2022
Arbitrum Unique Addresses Chart

Arbitrum Statistics (2022)

Layer 2June 2, 2022
Source: Altoros

SNARKs vs. STARKS vs. Recursive SNARKs

Layer 2May 27, 2022
Source: Polygon

Polygon ZK Rollups: Everything You Need to Know

Layer 2May 18, 2022
ethereum transactions per second chart

A Developer's Guide To Ethereum Scaling Solutions

Layer 2May 17, 2022
Ethereum sidechain

Ethereum Sidechains vs Layer 2s: What’s the Difference?

Layer 2May 16, 2022

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