Best 32 AI speech synthesis Tools of 2025

FineVoice is a multifunctional AI voiceover platform that utilizes advanced artificial intelligence technology to provide users with realistic and personalized voice services. This platform not only converts text into natural-sounding voices but also offers speech-to-text and voice-changing capabilities, greatly enriching the possibilities for content creation. FineVoice's primary advantages include high efficiency, low cost, multilingual support, and user-friendliness, making it especially suitable for individuals and businesses that need to generate large volumes of voice content quickly.

seed-vc is a voice conversion model based on the SEED-TTS architecture, capable of zero-shot voice conversion, meaning it can convert voices without requiring specific voice samples from individuals. This technology excels in audio quality and tonal similarity, holding substantial research and application value.

OptiSpeech is an efficient, lightweight, and fast text-to-speech model specifically designed for device-side text-to-speech conversion. Leveraging advanced deep learning techniques, it converts text into naturally sounding speech, making it suitable for applications that require speech synthesis on mobile devices or embedded systems. The development of OptiSpeech was significantly accelerated by GPU resources provided by Pneuma Solutions.

speech-to-speech is an open-source modular GPT4-o project that achieves speech-to-speech conversion through sequential components such as voice activity detection, speech-to-text, language modeling, and text-to-speech synthesis. It leverages the Transformers library and models available on the Hugging Face hub, providing a high degree of modularity and flexibility.

Pandrator is a tool based on open-source software that converts text, PDF, EPUB, and SRT files into voice audio in multiple languages. It includes features for voice cloning, LLM-based text preprocessing, and directly saving generated audio subtitles into video files, blending them with original audio tracks. It is designed for ease of use and installation, featuring a one-click installer and a graphical user interface.

FunAudioLLM is a framework aimed at enhancing natural voice interaction between humans and Large Language Models (LLMs). It comprises two innovative models: SenseVoice, responsible for high-precision multi-lingual speech recognition, emotion recognition, and audio event detection; and CosyVoice, responsible for natural voice generation, supporting multi-lingual, timbre, and emotion control. SenseVoice supports over 50 languages with extremely low latency; CosyVoice excels in multi-lingual voice generation, zero-shot context generation, cross-lingual voice cloning, and instruction following capabilities. Relevant models are open-sourced on Modelscope and Huggingface, and corresponding training, inference, and fine-tuning codes are released on GitHub.

ChatTTS-Forge is a project built around the ChatTTS text-to-speech generation model. It provides a comprehensive API service and a Gradio-based WebUI, enabling the generation of long texts exceeding 1000 words while maintaining consistency. The platform boasts built-in style management with 32 distinct styles.

ChatTTS-ui is a web interface and API interface for the ChatTTS project. It allows users to perform text-to-speech operations through a webpage and remotely call the service through an API interface. It supports multiple voice options, and users can customize the text-to-speech parameters, such as adding laughter or pauses. This project provides an easy-to-use interface for text-to-speech technology, lowering the technical barrier and making text-to-speech more convenient.

ChatTTS is an open-source text-to-speech (TTS) model that allows users to convert text into speech. This model is primarily aimed at academic research and educational purposes and is not suitable for commercial or legal applications. It utilizes deep learning techniques to generate natural and fluent speech output, making it suitable for individuals involved in speech synthesis research and development.

ElevenLabs Audio Native is an automated, embedded voice playback tool that can automatically generate human-like voiceovers for any article, blog post, or news brief. It is customizable, easy to set up, and helps increase reader engagement while making content more accessible to global readers and listeners.

OpenVoice V2 is a text-to-speech (TTS) model released in April 2024, which includes all the features of V1 and has been improved. It employs a distinct training strategy to deliver superior sound quality, supporting English, Spanish, French, Chinese, Japanese, and Korean, among other languages. Additionally, it provides free usage for commercial purposes. OpenVoice V2 can precisely clone reference pitch coloration and generate speech in various languages and accents. It also supports zero-shot cross-language cloning, meaning the language of the generated speech and the reference speech do not need to be present in a large-scale multilingual training dataset.

Parler-TTS is a lightweight text-to-speech (TTS) model developed by Hugging Face that can generate high-quality, natural-sounding speech in a given speaker style (gender, tone, speaking style, etc.). It is an open-source implementation of the paper "Natural language guidance of high-fidelity text-to-speech with synthetic annotations" by Dan Lyth and Simon King from Stability AI and the University of Edinburgh, respectively. Unlike other TTS models, Parler-TTS is fully open-source, including the dataset, preprocessing, training code, and weights. Features include: * Generation of high-quality, natural-sounding speech output * Flexible usage and deployment * Provision of a rich annotated speech dataset. Pricing: Free.

Voice Engine is an advanced speech synthesis model that requires only 15 seconds of voice samples to generate natural speech that is extremely similar to the original speaker. This model is widely used in the fields of education, entertainment, healthcare, and more, offering reading assistance for non-reading audiences, translating speech for video and podcast content, and providing unique voice characteristics for non-verbal individuals. Its significant advantages include the minimal number of voice samples required, high-quality generated speech, and multi-language support. Voice Engine is currently in a limited preview stage, with OpenAI discussing its potential applications and ethical challenges with individuals from various sectors.

NaturalSpeech 3 aims to enhance speech synthesis quality, similarity, and rhythm by decomposing the various attributes of speech (e.g., content, prosody, timbre, and acoustic details) and generating each attribute separately. The system designs a neural encoder-decoder with decomposed vector quantization (FVQ) to decouple the speech waveform and proposes a decomposed diffusion model to generate each sub-space attribute based on corresponding prompts.

MeloTTS is a multi-language text-to-speech library developed by MyShell.ai, which supports English, Spanish, French, Chinese, Japanese, and Korean. It is capable of real-time CPU inference, suitable for a variety of scenarios, and open to contributions from the open-source community.

SpeechGPT is a multimodal language model with inherent cross-modal dialogue capabilities. It can perceive and generate multimodal content and follow multimodal human instructions. SpeechGPT-Gen is an extended information chain speech generation model. SpeechAgents is a multimodal multi-agent system for human communication simulation. SpeechTokenizer is a unified speech tokenizer suitable for speech language models. The release dates and related information of these models and datasets can be found on the official website.

StreamVoice is a language model-based zero-lip speech conversion model that enables real-time conversion without requiring the complete source speech. It utilizes a full causal context-aware language model combined with a time-independent acoustic predictor, allowing it to alternately process semantic and acoustic features at each time step, thereby eliminating the dependency on complete source speech. To enhance the performance degradation that may arise in streaming due to incomplete context, StreamVoice employs two strategies to augment the language model's context-awareness: 1) Teacher-guided Context Prediction, where a teacher model summarizes the current and future semantic context during training, guiding the model to predict missing contexts; 2) Semantic Masking Strategy, which promotes acoustic prediction from previously damaged semantic and acoustic inputs, enhancing the contextual learning capability. Notably, StreamVoice is the first language model-based streaming zero-lip speech conversion model that does not require any future prediction. Experimental results demonstrate that StreamVoice exhibits streaming conversion capabilities while maintaining comparable zero-lip performance to non-streaming speech conversion systems.

Voice Replica is a high-efficiency, lightweight audio customization solution. Users can quickly obtain an exclusive AI-customized voice by recording a few seconds of audio in an open environment. Core product advantages include ultra-low cost, ultra-fast replication, high fidelity, and technological leadership. Applicable scenarios include video dubbing, voice assistants, in-car assistants, online education, and audiobooks.

Deepgram Aura is an innovative text-to-speech model that delivers voice quality, speed, and cost-efficiency surpassing other voice AI solutions. It's perfect for building real-time AI assistants and agents capable of natural human interaction. Aura can be used independently or in conjunction with Deepgram's Nova-2 speech-to-text API, providing developers with a comprehensive voice AI platform to build the next generation of high-throughput, real-time AI assistants.

Narrativ partners with publishers across multiple industries to transform written content into audio using cloned voices. With our app, you can stream the latest news, dive into compelling stories, and stay informed about local, state, national, and international events.

Voice Changer lets you transform your voice into another character, controlling its emotions and delivery. Easily create custom voices for games, videos, podcasts, and more with a single click. Choose from an existing library of voices or create your own in minutes. Fine-tune your voice output with advanced settings, precisely controlling audio clarity, stability, and quality enhancements. ElevenLabs' Voice Changer is used and praised by developers, creators, and businesses worldwide.

RealtimeTTS is an easy-to-use, low-latency text-to-speech library for real-time applications. It converts text streams into immediate audio output. Key features include real-time streaming synthesis and playback, advanced sentence boundary detection, and a modular engine design. This library supports multiple text-to-speech engines and is suitable for voice assistants and applications requiring real-time audio feedback. For detailed pricing and positioning information, please refer to the official website.

Narrator is a Python application that utilizes the APIs of OpenAI and ElevenLabs to enable David Attenborough to narrate your life. Users need to set up the relevant API keys and voice ID, and run the webcam capture and narrator Python scripts.

StyleTTS 2 is a text-to-speech (TTS) model that utilizes large speech language models (SLMs) for style diffusion and adversarial training, achieving human-level TTS synthesis. It employs a diffusion model to model style as a latent stochastic variable, generating the most appropriate style for the given text without relying on voice references. Furthermore, we utilize large pre-trained SLMs (such as WavLM) as discriminators and incorporate our innovative differentiable duration modeling for end-to-end training, enhancing the naturalness of the synthesized speech. StyleTTS 2 surpasses human recordings on the single-speaker LJSpeech dataset and matches them on the multi-speaker VCTK dataset, garnering recognition from native English-speaking evaluators. Additionally, when trained on the LibriTTS dataset, our model outperforms prior publicly available zero-shot extension models. By demonstrating the potential of style diffusion and adversarial training with large SLMs, this work achieves human-level TTS synthesis on both single and multi-speaker datasets.

Voices AI is an iOS-designed voice conversion app that can generate voices, clone custom voices, and enhance audio quality through AI. It offers a wide range of voice libraries, from iconic political figures to Hollywood celebrities, to make your text more vivid. For content creators, it can provide industry-standard voiceovers for videos, TV clips, commercials, and more. It can also be used to create special birthday wishes for your friends or to enjoy the experience of hearing famous voices echoing your emotions. It features high-quality audio, an intuitive interface, and privacy protection. You can use it to clone your own voice and utilize its AI audio enhancement capabilities to improve audio quality.

Voice Remaker is a completely free AI voice generation tool that uses the best synthesis voices to produce text-to-speech (TTS) audio that sounds incredibly close to real human voices. Instantly convert text into natural-sounding speech and download it as an MP3 audio file.

Voice Remaker is a completely free, embedded AI voice generation tool that uses cutting-edge synthesis technology to create audio that's as close to natural speech as possible. It supports AI text-to-speech, history tracking, audio file download, and deletion features. With Voice Remaker, you can instantly convert text into natural-sounding voices and save them as MP3 files.

Podcastle AI can instantly convert your written news and articles, blog posts into podcasts and further edit your podcasts within our all-encompassing web-based collaborative podcast creation platform. Price: Free to use, paid plans offer additional features. Positioning: Helping users convert text content into audio, making it convenient for them to access information audibly.

PlayHT AI voice generator is a tool that uses artificial intelligence to transform text into natural, realistic human voice performances. No matter what language or accent, our voice AI can instantly convert text into natural, fluid speech.

Altered Studio is a unique technology that transforms your voice into one of our expertly designed AI voices to create captivating, professional voice-driven performances. It offers professional voice editing tools and flexible AI voice customization, making it suitable for various media projects like voice acting, film production, and advertising. With Altered Studio, you can transform your voice into any style, gender, age, or language, adding a unique flair to your creations.