ELSA (English Language Speech Assistant) Corp. is a San Francisco-based funded startup with engineering offices in Lisbon. Our vision is to enable everyone to speak foreign languages with full confidence, reaching better life and career opportunities. Our flagship product, ELSA speak, is a personal mobile coach who improves our users' English pronunciation and intonation using phonetic and suprasegmental analysis of the user's speech. Our backend servers implement state-of-the-art speech assessment technology to pinpoint the user’s most outstanding errors and give accurate and consistent feedback on how to solve them.