Top 10 AI Voice and Speech Technologies Dominating 2025 (TTS, STT, Voice Cloning)
Google Cloud Speech AI provides Text-to-Speech with 380+ voices across 50+ languages using WaveNet/Neural2, Speech-to-Text in 125+ languages, and Custom Voice generally available in 2024. Azure Speech Service offers Neural Text-to-Speech with 446 voices in 144 languages (as of mid-2024), Speech-to-Text in 75+ languages, and Custom Neural Voice with cloud or on-prem deployment. Amazon Polly delivers 100+ voices in 40+ languages, includes Neural Generative TTS with 13 ultra-expressive voices by late 2024, and Amazon Transcribe supports 100+ languages. IBM Watson Speech Services provide Text-to-Speech in 13+ languages and Speech-to-Text in 8–10 languages, with 2024 Large Speech Models and on-prem deployment