These days, the number one requirement of any website is to run correctly on all kinds of devices (especially mobiles). For that end, Bootstrap has been one of the most popular front-end frameworks and has been featured in the top list of many developers for designing mobile-friendly websites.
While Bootstrap is undoubtedly amazing at what it does, there are some other frameworks that are equally good and may fit your requirements better.
Tailwind CSS is a highly-customizable, low-level CSS framework built entirely around the concept of utility classes, which Bootstrap also provides out-of-the-box. With utility classes, you can mix and match CSS properties anywhere without necessarily resorting to inline styles.
Bulma came to market around 3 years ago and became instantly popular. It was one of the first CSS frameworks to have implemented a full-fledged flexbox grid. Except this, it has a huge selection of components needed to code any kind of website. Bulma comes with a beautiful range of colors out-of-the-box and it won’t be wrong if we call it the most beautiful framework out there in the market. It can be used directly to get really nice looking websites with very least effort.
"A Framework for any device, medium, and accessibility." is what they call themselves and they certainly are true. With all the perks of an advanced framework, Foundation is definitely the strongest alternative to Bootstrap. It is being used by some of the biggest organizations in the world for e.g. Adobe, Amazon, HP, eBay etc to quote a few. It included all the necessary components of an application like a responsive grid, buttons, basic typography, and many other UI elements.
Not only this, but they also have ‘Foundation for Emails’ which is a framework to code responsive HTML emails. Hence, whenever you are looking for an alternative to Bootstrap, do give Foundation a try.
Pure is a CSS framework developed by YAHOO. It helps you develop faster, beautiful and responsive websites with a minimal footprint (the entire set of module clocks is around 4KB). It uses Normalize.css and provides layout and styling for common UI components. It's like a better and slightly fancier Normalize. It uses the SMACSS architecture to modularize the CSS code, which makes it a modular framework by nature.
It allows the developers to create responsive layouts by using grids, menus, menus, forms, buttons and much more. This small yet useful framework outperforms Bootstrap when it comes to mobile devices.
Materialize is a modern responsive front-end framework based on Material Design principles of Google. Material design is a design language created by Google, which combines traditional methods of designs along with innovations and technology. This framework is perfect for the developers who wish to incorporate a touch of Material Design on their website without any complicated code. It offers card design, Sass mixins, drag-out mobile menu, ripple effect animation and much more. The developers of the framework have also provided code examples and detailed documentation to help users new users get started with the framework.
Do you know any others plz let me know :)