Astra

A fast, lightweight WordPress theme with 300+ starter templates and 2M+ active users

Best for: WordPress site builders who want a fast, lightweight theme with a huge library of starter templates and deep page-builder compatibility.
Skip if: You're not building on WordPress, or you need advanced customization that requires the paid Astra Pro add-on.

Astra is a free, GPL-licensed WordPress theme by Brainstorm Force built for speed and flexibility, loading in under 0.5 seconds at under 50KB on the frontend. It integrates deeply with Elementor, Beaver Builder, and Gutenberg, is WooCommerce-ready and accessibility-compliant, and ships 300+ starter templates for fast site launches. A paid Astra Pro tier adds advanced customization.

Pros

Extremely fast and lightweight (under 0.5s load, under 50KB frontend)
One of the most widely used WordPress themes, with 2M+ active installs
300+ starter templates for rapid site launches
Deep integration with Elementor, Beaver Builder, and Gutenberg

Cons

Advanced customization options are gated behind the paid Astra Pro add-on
General-purpose theme rather than a purpose-built SaaS/app starter
As with most popular themes, achieving a unique design requires real customization effort