Infrastructure as Code (IaC) has become a cornerstone of modern DevOps practices, enabling teams to provision and manage cloud infrastructure through code. In the Azure ecosystem, two primary tools for implementing IaC are Azure Resource Manager (ARM) templates and Bicep. While both serve similar purposes, they differ significantly in syntax, usability, and functionality. This blog will compare these tools to help you decide which one to use for your Azure infrastructure needs. Azure Resource Manager Templates ARM templates have been the backbone of Azure IaC for many years. Written in JSON, they define the infrastructure and configuration for Azure resources declaratively. Key Features: Advantages: Challenges: Bicep Bicep is a domain-specific language (DSL) introduced by Microsoft to simplify the authoring of Azure IaC. It is designed as a more user-friendly alternative to ARM templates. Key Features: Advantages: Challenges: Comparing ARM Templates and Bicep Feature ARM Templates Bicep Syntax Verbose JSON Concise DSL Modularity Limited Strong Support Tooling Mature Rapidly Improving Resource Support Full Full Ease of Use Challenging Beginner-Friendly Community Support Extensive Growing When to Use ARM Templates ARM templates remain a solid choice for: When to Use Bicep Bicep is ideal for: To conclude, both ARM templates and Bicep are powerful tools for managing Azure resources through IaC. ARM templates offer a mature, battle-tested approach, while Bicep provides a modern, streamlined experience. For teams new to Azure IaC, Bicep’s simplicity and modularity make it a compelling choice. However, existing users of ARM templates may find value in sticking with their current workflows or transitioning gradually to Bicep. Regardless of your choice, both tools are fully supported by Azure, ensuring that you can reliably manage your infrastructure in a consistent and scalable manner. Evaluate your team’s needs, skills, and project requirements to make the best decision for your IaC strategy. We hope you found this blog useful, and if you would like to discuss anything, you can reach out to us at transform@cloudfonts.com.