Yes, Bulma can be considered an alternative to Bootstrap in the realm of CSS frameworks. Both Bulma and Bootstrap are popular front-end frameworks used for building responsive and attractive web interfaces, but they have some differences in their approaches and features.

Here's a comparison :

Bulma :

* Flexbox-Centric : Bulma heavily relies on Flexbox for layout, offering a more modern approach to creating flexible and responsive designs.

* Modularity : It follows a more modular structure, providing separate components and utility classes that developers can use independently, reducing file size and offering more customization options.

* Minimalistic Design : Bulma has a more minimalistic default design compared to Bootstrap. It provides a clean slate for customization without imposing a distinct visual style.
Bootstrap :

* Grid System : Bootstrap uses a grid system based on Flexbox (in Bootstrap 4) or Flexbox with some legacy support for older browsers (in Bootstrap 3). It's well-established and widely used.

* Predefined Components : Bootstrap comes with an extensive set of pre-styled components, including buttons, forms, navigation bars, and more, giving a consistent look and feel out-of-the-box.

* JavaScript Components : Bootstrap includes a range of JavaScript-powered components like modals, carousels, and tooltips that come bundled with the framework.