Apps similar to azure pronunciation assessment include Artikulate, which is free and open source. Other options are ELSA Speak and Pronauns. In total there are three Language Learning Tools like azure pronunciation assessment for Linux, the web, Android and iPhone.
Artikulate is a pronunciation trainer that helps improving and perfecting a learner's pronunciation skills for a foreign language. It provides courses with native speaker recordings for several training languages.
Germany
EU
ELSA is a virtual pronunciation coach, a mobile application to help everyone speak English like a native speaker. ELSA is an artificial intelligence teacher who will help you have perfect English pronunciation, practice frequently-used English words, phrases and communications.
United States
Pronauns is a website to practice English pronunciation and speak more like a native speaker. Pronauns will help you to learn International Phonetic Alphabet and practice the pronunciation of words with wordlists categorized according to language levels or word frequencies.
