Octave

Pricing model
Freemium
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Hume AI's Octave is a sophisticated text-to-speech platform capable of producing realistic, emotionally rich speech with contextual comprehension. Users can design custom AI voices, modify tone and rhythm, and express intricate emotions such as sarcasm. This system is beneficial for content creators, game developers, and businesses aiming to generate captivating audio content, enhance voice production efficiency, or develop empathetic voice engagements in various languages, providing better performance and adaptability than conventional TTS technologies.

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Open Source
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KittenTTS is an ultra-lightweight open-source text-to-speech model that converts written text into natural-sounding speech with impressive quality, all while requiring minimal computational resources. Unlike most speech conversion AI models that demand powerful hardware, KittenTTS operates efficiently on almost any device, including older computers, Raspberry Pi, and even browsers, thanks to its tiny size of 25 MB and design with 15 million parameters. This AI model provides several realistic voices in real-time without needing an internet connection or GPUs, making it ideal for developers creating privacy-focused applications, edge computing projects, accessibility tools, or any scenarios where resource efficiency is vital. Combining high output quality, incredible speed on CPU-only systems, and an open-source Apache 2.0 license, KittenTTS represents a breakthrough in AI-powered voice conversion where larger models simply cannot function.
Freemium
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Acoust is a web-based Text-to-Speech (TTS) application that leverages cutting-edge AI technology to create realistic speech. It can be employed to make voice-overs, listen to documents and articles, and create audio content. The tool is compatible with over 30 languages and offers more than 100 natural voices for TTS. Additionally, it includes features like an AI assistant, a video creator, and a TTS and AI prompt enhancer.
Freemium
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Uberduck is a community-driven open-source voice AI platform that enables users to quickly develop AI-generated audio applications utilizing their APIs. It offers the ability to produce AI voiceovers with over 5,000 expressive voices and to develop personalized voice clones through their AI-generated rap feature. Additionally, it supplies API documentation and a blog to assist users in getting started. Moreover, they are in the process of creating a platform for interactive voice and chat bots.