Why Leading Top SaaS Platforms Still Trust BEM CSS for Scalability and Performance

Why SaaS Leaders Still Choose BEM in 2025

In 2025, SaaS development will dominate the digital world, offering cloud-based solutions for businesses worldwide. However, as these platforms scale, managing CSS efficiently becomes a major challenge, especially in SaaS Consulting Services. To solve this, major SaaS companies like Shopify, Slack, Salesforce, and Trello rely on the BEM (Block Element Modifier) methodology to keep their CSS clean, scalable, and maintainable. In areas like Shopify development and other SaaS-based applications, BEM ensures consistency and efficiency across rapidly growing codebases. But why do the biggest SaaS brands still use BEM in 2025 when newer technologies like CSS-in-JS and utility-first frameworks exist? Let’s explore.

What Makes BEM CSS Perfect for SaaS Platforms?

1. Scalability for Large-Scale SaaS Applications

SaaS products handle millions of users and need a scalable design system. BEM ensures:

• Reusable components across different sections of the platform.
• Consistent styling across teams working on various SaaS features.
• Better organization for long-term maintainability.

2. Improved Performance & Faster Page Loads

Modern SaaS applications prioritize performance optimization. BEM helps by:

• Reducing unnecessary CSS with structured class names.
• Minimizing CSS file size, ensuring faster page loads.
• Improving caching efficiency since styles are modular and predictable.

3. BEM Works with Modern SaaS Tech Stacks

Many SaaS companies use React, Vue.js, and Angular for front-end development.

• BEM integrates seamlessly with these frameworks.
• Works well with SCSS, Tailwind CSS, and Bootstrap.
• Supports CSS-in-JS solutions like Styled Components while maintaining consistency.

Big SaaS Companies That Use BEM CSS

1. Shopify – Scalable E-commerce for Millions of Businesses

Why Shopify Uses BEM?

• Handles thousands of e-commerce templates with reusable styles.
• Maintains consistent UI across stores with modular components.
• Improves performance for mobile-first web experiences.

2. Slack – The Leading Business Communication Tool

Why Slack Uses BEM?

• Modular CSS makes it easier to manage real-time chat UI.
• BEM ensures better performance for web and desktop apps.
• Improves accessibility by keeping CSS well-structured.

3. Trello – Project Management for Teams

Why Trello Uses BEM?

• Trello’s drag-and-drop UI requires a structured CSS approach.
• BEM keeps styling modular, making it easy to update UI elements.
• Prevents conflicts in a component-based architecture.

4. Salesforce – The #1 CRM Software

Why Salesforce Uses BEM?

• Ensures scalability for enterprise-level UI.
• Helps maintain UI consistency across different dashboards.
• Reducing CSS complexity in large applications.