Speech-To-Text API Tools

AssemblyAI offers state-of-the-art speech-to-text and speech understanding AI models designed for developers to build, ship, and scale voice AI applications with high accuracy, multilingual support, and advanced features like speaker diarization and contextual prompting.

Speechmatics offers advanced AI speech technology delivering high-accuracy, low-latency speech-to-text and text-to-speech services across 55+ languages. Designed for enterprises with global reach, it supports real-time transcription, multilingual conversations, and speaker diarization, enabling powerful voice AI agents and live captioning. The platform ensures enterprise-grade security with flexible deployment options including cloud, on-premises, and on-device.

Gladia is a developer-focused speech-to-text API that delivers real-time transcription with sub-300ms latency, supporting over 100 languages including rare and multilingual conversations. It offers highly accurate transcription with advanced features like speaker sentiment analysis, entity extraction, custom vocabulary, and seamless integration with telephony protocols and communication platforms. Designed for scalability and enterprise use, Gladia ensures stable, predictable performance without infrastructure burdens, making it ideal for customer experience, sales enablement, meeting assistants, and media workflows.