Picovoice.ai
AssemblyAI
Google Cloud Speech API
Deepgram
Azure Speech Services
Weesper Neon Flow
Speechmatics
Wispr Flow
MT4API.dev
On-device Voice AI Platform, offering everything enterprises need to build voice AI-powered products: Wake Word (Keyword Spotting) Async Speech-to-Text (transcription) Real-time transcription (streaming STT) Async Text-to-Speech (Speech Synthesis) Streaming Text-to-Speech (TTS) Language Understanding (Small Language Models, LLM Quantization, LLM Inference) Noise Suppression and Cancellation Speech-to-Intent Voice Activity Detection Speaker Diarization Speaker Recognition and Identification
All on-device. Runs across mobile, web, desktop, and embedded. Build voice AI agents, voice AI companions, voice assistants, or simply add voice to any software, make conversations clear, and analyze speech data without sacrificing accuracy, performance, and privacy.
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I cannot believe I haven't met Picovoice before. The free plan is decent to get familiar with the tech and the tech is sick. I mean it. I tried Amazon, Microsoft, Google, Deepgram, Assembly and Speechmatics. I thought Deepgram was fast. You get Speaker Recognition, Noise Suppression and Voice Activity Detection and all the other stuff too.
AssemblyAI - Robust and Accurate Multilingual Speech Recognition
Google Cloud Speech API - Cloud Speech offers speech to text conversion powered by machine learning.
Deepgram - Search engine for speech
Azure Speech Services - Learn more about Cognitive Speech Services, a comprehensive new offering that includes text to speech, speech to text and speech translation capabilities. Demo speech services today.
Weesper Neon Flow - Don't type โ just speak! Weesper Neon Flow lets you dictate 3ร faster across all your apps. Enjoy private, offline AI voice transcription with smart punctuation, multiโlanguage support and polished text wherever you work.
Speechmatics - The most accurate and inclusive speech-to-text API ever released.