Susy Alternatives & Competitors

Simple and flexible HTML, CSS, and JS for popular UI components and interactions.

Key Bootstrap features:

Responsive Design Pre-designed Components Cross-browser Compatibility Extensive Documentation

Open Source

The most advanced responsive front-end framework in the world.

Key Foundation features:

Customizability Responsive Design Semantic Code Range of Components

Open Source

Monitor all your cloud services with our status page aggregator. IT teams choose IsDown to monitor all their vendors and get alerts whenever an outage occurs. Integration with Datadog, PagerDuty, Slack, Microsoft Teams, and a lot more.

Key IsDown.app features:

Status Dashboard Multiple Profiles for same account Slack App Zapier Integration

Try for free paid Free Trial $37.0 / Monthly (Pro)

Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.

Key Bulma features:

Simple and Elegant Design Responsive Layouts Ease of Use BEM Methodology

Open Source

Bootstrap Admin Templates on steroids! Collection of premium bootstrap admin templates.

A CSS Framework and a Set of React Components that Implement Google's Material Design.

Key Material UI features:

Comprehensive Component Library Customizability Active Community and Support Improved Productivity

Open Source free

BOOTFLAT is an open source Flat UI KIT based on Bootstrap CSS framework. And, for the designers, we offer a free PSD Download. It provides a faster, easier and less repetitive way for web developers or designers to create elegant web apps.

A UI Component library implemented using a set of specifications designed around natural language.

Key Semantic UI features:

Intuitive Class Names Customizability Comprehensive Components Flexibility

Open Source

A set of small, responsive CSS modules that you can use in every web project.

Key Purecss features:

Lightweight Responsive Modular Easy Integration

Open Source

Metro UI CSS a set of styles to create a site with an interface similar to Windows 8.

Key Metro UI features:

Modern Aesthetic Responsive Design Ease of Use Customizable

Open Source

A modern responsive front-end framework based on Material Design.

Key Materialize CSS features:

Responsive Design Material Design Component Variety Customization

Open Source

The CSS Library that Loves to Be Extended.

An enterprise-class UI design language and React implementation with a set of high-quality React components, one of best React UI library for enterprises.

Key Ant Design features:

Comprehensive Component Library Design System Responsive and Adaptive Internationalization Support

Open Source

Open Designs is an open source web design gallery with over 2000 free website templates that help to make the global internet a prettier place.

Key Open Designs features:

Accessibility Variety Community Support Ease of Use