Both ReactJS and AngularJS can be made SEO-friendly with the right techniques. ReactJS initially faced challenges with SEO due to its client-side rendering approach, but it now supports Server-Side Rendering (SSR) and Static Site Generators (SSG) for better SEO performance. AngularJS, on the other hand, has built-in support for SEO through Angular Universal, which renders HTML on the server-side. Ultimately, the SEO performance of your application depends on how you implement and configure the framework.