Free Voice & Speech AI Tools

Relyable is a simulation and monitoring platform for AI voice agents that generates realistic test conversations, evaluates every call against customizable rubrics, and monitors live production calls with real-time alerts to help teams ship high-performing voice agents faster.

Spokenly is an AI-powered, privacy-first dictation app that converts speech to text system-wide on Mac, Windows, Linux and iPhone, offering offline local models (Whisper & Parakeet), cloud model support via user-provided API keys, multilingual recognition, and real-time AI text processing.

Vogent Voicelab is a public-beta, high-quality text-to-speech platform and API that hosts state-of-the-art voice models (e.g., Sesame CSM-1B, Dia, Chatterbox, Orpheus), offering ultra-fast real-time inference, zero-shot voice cloning, hosted fine-tuning, and scalable deployment (including on-prem/VPC) for developers and enterprises.

Deepgram provides enterprise Voice AI APIs — real-time and batch speech-to-text (STT), text-to-speech (TTS), audio intelligence, and unified Voice Agent capabilities (including LLM orchestration) for developers, platforms, and enterprises.

AI speaker is a free online text-to-speech tool that converts text into human-like, emotionally expressive audio in many languages, with web and client apps for exporting MP3, subtitles and video assets.

Murf AI is an end-to-end AI voice platform providing production-grade text-to-speech APIs (Murf Falcon), a Studio for fast voiceover creation, and AI dubbing and agent solutions to build scalable conversational voice agents and localized audio content.

Speechify is a cross-platform Voice AI productivity assistant that provides text-to-speech, AI voice generation, voice typing (dictation), voice cloning, dubbing, and developer APIs to read, write, summarize, and create audio content across web, desktop, and mobile devices.

ELSA Speak is an AI-powered English speaking coach (mobile app and B2B/Schools offerings) that provides personalized lessons, real-time pronunciation feedback, role-play conversations, and progress tracking to help learners improve fluency and confidence.