Currently, we rely on a mix of both Google and Bing libraries to provide you with answers to your searches. Starting in 2025, our new index will be added into the database pool to serve results in both the French and German language. We are starting small and in the home countries of both Qwant and Ecosia respectively. 
blog.ecosia.org, in "We’re teaming up with Qwant to build a European search index"

Good timing. I recently switched the default search provider on my iPhone to them.