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Top 10 Open Source Alternatives to ElevenLabs in 2025

Top 10 Open Source Alternatives to ElevenLabs in 2025

As ElevenLabs continues to offer advanced text-to-speech (TTS) solutions, several open-source alternatives have emerged, offering varied features and functionalities. This article explores the top 10 open-source TTS tools in 2025, detailing key aspects such as voice quality, language support, customization options, and performance.
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1. Coqui AI (xtts-v2)

  • Description: An open-source text-to-speech project built on top of TortoiseTTS that offers additional functionality.
  • Voice Quality: Produces natural-sounding speech, including expressive and emotional speech styles.
  • Speed: Can achieve near real-time performance with an Nvidia GPU.
  • Features: Offers features like voice cloning, style cloning, and multi-lingual support.
  • Maintenance: The company behind it shut down in January 2024, meaning it is no longer actively maintained.
  • License: Current license does not permit commercial use. Learn more about Coqui AI

2. TortoiseTTS

  • Description: A popular open-source TTS library known for its natural-sounding speech.
  • Voice Quality: Produces some of the most natural sounding speech among open source options.
  • Voices: Generates multiple distinct voices.
  • Speed: Original Python version is slow, but a faster C++ implementation is available.
  • Text Adherence: May occasionally deviate from the exact input text.
  • Implementation: C++ version available for faster processing. Explore TortoiseTTS
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3. Mozilla TTS

  • Description: An open-source model and toolset for converting text to human-like speech.
  • Open Source: Provides tools and models for free use and modification.
  • Accessibility: Aims to make TTS technology accessible.
  • Community Driven: Benefits from the open-source community.
  • Customization: Allows for customization and flexibility.
  • Language Support: Supports multiple languages (specific language list may vary depending on the version). Learn more about Mozilla TTS

4. Mimic

  • Description: A high-speed, open-source TTS engine, that is lightweight.
  • Speed: Designed for real-time speech generation.
  • Language Support: Supports multiple languages and voices.
  • Application: Suitable for voice assistants and interactive applications.
  • Development: Developed by Mycroft AI.
  • Cost: Free, due to being open-source. Explore Mimic

5. MaryTTS

  • Description: A Java-based open-source TTS engine providing natural-sounding speech synthesis.
  • Multilingual Support: Supports multiple languages including English, German, Russian, Turkish, and more.
  • Input Formats: Can process various input formats, including MARY XML and plain text.
  • Customization: Offers voice customization and text normalization options.
  • Flexibility: Known for its flexibility and ease of use.
  • Technology: Java-based engine. Learn more about MaryTTS
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6. eSpeak

  • Description: A compact, open-source software speech synthesizer.
  • Languages: Supports many languages.
  • Size: Small size, making it suitable for embedded systems and low-resource devices.
  • Speed: Generates speech relatively quickly.
  • Customization: Can be customized.
  • Cost: Free, due to being open-source. Explore eSpeak

7. OpenVoice

  • Description: An instant voice cloning tool from MIT and MyShell, focusing on accurate tone and style.
  • Tone Cloning: Can accurately clone the reference tone color and generate speech in multiple languages and accents.
  • Style Control: Offers flexible control over voice styles, including emotion and accent.
  • Cross-Lingual Voice Cloning: Enables zero-shot cross-lingual voice cloning.
  • License: Free for commercial use under the MIT License.
  • Languages: Supports languages such as English, Spanish, French, Chinese, Japanese, and Korean. Learn more about OpenVoice

8. Ultravox

  • Description: A new, fast open-source TTS directly transforming audio input using Meta's Llama 3 model.
  • Speed: Fast enough for real-time AI conversations.
  • Real-time: Time-to-first-token is approximately 150ms.
  • Technology: Utilizes Llama 3 model.
  • Limitation: Currently does not support voice cloning.
  • Cost: Open Source. Explore Ultravox

9. StyleTTS

  • Description: An open-source TTS that performs well with English.
  • Language: Best for English.
  • Expressiveness: Capable of expressing emotion and style.
  • Speed: Fast when using an Nvidia GPU.
  • Cost: Open Source.
  • Maintenance: May not be actively maintained. Learn more about StyleTTS

10. VITS

  • Description: An open-source TTS that can run on-device.
  • Usage: Suitable for on-device use.
  • Performance: Designed for optimized performance.
  • Flexibility: Can be customized.
  • Cost: Open Source.
  • Technology: Utilizes a variation of transformer model. Discover VITS
Disclaimer: This information is based on the provided search results and is current as of January 19, 2025. The open-source landscape is dynamic, so some details may have evolved since the data was collected. Always check the latest project documentation for the most accurate information.
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FAQ

1. Which open-source TTS alternative has the best voice quality in 2025?
TortoiseTTS is known for producing some of the most natural-sounding speech among open-source alternatives. Learn more about TortoiseTTS
2. What unique features does Coqui AI (xtts-v2) offer?
Coqui AI offers voice cloning, style cloning, and multi-lingual support, although it is no longer actively maintained. Learn more about Coqui AI | Discover Coqui AI features
3. Which TTS engine is suitable for low-resource devices?
eSpeak is a compact, open-source software speech synthesizer suitable for embedded systems and low-resource devices.
4. What is the primary focus of OpenVoice?
OpenVoice focuses on accurate tone and style, providing flexible control over voice styles and enabling cross-lingual voice cloning. Discover more about OpenVoice
5. Which TTS alternative is ideal for real-time applications?
Mimic is designed for real-time speech generation, making it suitable for voice assistants and interactive applications.
6. What language support does MaryTTS provide?
MaryTTS supports multiple languages, including English, German, Russian, and Turkish, among others.
7. Which alternative uses Meta's Llama 3 model for TTS?
Ultravox utilizes Meta's Llama 3 model for fast, real-time text-to-speech conversion.
8. Which TTS tool allows for deep customization and flexibility?
Mozilla TTS allows for deep customization and flexibility, benefiting from the contributions of the open-source community.
9. What are the key features of VITS TTS?
VITS TTS is known for its optimized performance and suitability for on-device use, utilizing a variation of the transformer model.
10. Which TTS alternative offers a combination of speed and expressiveness?
StyleTTS is known for its combination of speed and expressive capabilities, especially when using an Nvidia GPU.

References

About the Author

Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.
Violetta is a true multiple specialist who has built expertise in Linguistics, Education, Business Management, Blockchain, Entrepreneurship, Intellectual Property, Game Design, AI, SEO, Digital Marketing, cyber security and zero code automations. Her extensive educational journey includes a Master of Arts in Linguistics and Education, an Advanced Master in Linguistics from Belgium (2006-2007), an MBA from Blekinge Institute of Technology in Sweden (2006-2008), and an Erasmus Mundus joint program European Master of Higher Education from universities in Norway, Finland, and Portugal (2009).
She is the founder of Fe/male Switch, a startup game that encourages women to enter STEM fields, and also leads CADChain, and multiple other projects like the Directory of 1,000 Startup Cities with a proprietary MeanCEO Index that ranks cities for female entrepreneurs. Violetta created the "gamepreneurship" methodology, which forms the scientific basis of her startup game. She also builds a lot of SEO tools for startups. Her achievements include being named one of the top 100 women in Europe by EU Startups in 2022 and being nominated for Impact Person of the year at the Dutch Blockchain Week. She is an author with Sifted and a speaker at different Universities. Recently she published a book on Startup Idea Validation the right way: from zero to first customers and beyond and launched a Directory of 1,500+ websites for startups to list themselves in order to gain traction and build backlinks.
For the past several years Violetta has been living between the Netherlands and Malta, while also regularly traveling to different destinations around the globe, usually due to her entrepreneurial activities. This has led her to start writing about different locations and amenities from the POV of an entrepreneur. Here’s her recent article about the best hotels in Italy to work from.

About the Publication

Fe/male Switch is an innovative startup platform designed to empower women entrepreneurs through an immersive, game-like experience. Founded in 2020 during the pandemic "without any funding and without any code," this non-profit initiative has evolved into a comprehensive educational tool for aspiring female entrepreneurs.The platform was co-founded by Violetta Shishkina-Bonenkamp, who serves as CEO and one of the lead authors of the Startup News branch.

Mission and Purpose

Fe/male Switch Foundation was created to address the gender gap in the tech and entrepreneurship space. The platform aims to skill-up future female tech leaders and empower them to create resilient and innovative tech startups through what they call "gamepreneurship". By putting players in a virtual startup village where they must survive and thrive, the startup game allows women to test their entrepreneurial abilities without financial risk.

Key Features

The platform offers a unique blend of news, resources,learning, networking, and practical application within a supportive, female-focused environment:
  • Skill Lab: Micro-modules covering essential startup skills
  • Virtual Startup Building: Create or join startups and tackle real-world challenges
  • AI Co-founder (PlayPal): Guides users through the startup process
  • SANDBOX: A testing environment for idea validation before launch
  • Wellness Integration: Virtual activities to balance work and self-care
  • Marketplace: Buy or sell expert sessions and tutorials

Impact and Growth

Since its inception, Fe/male Switch has shown impressive growth:
  • 3,000+ female entrepreneurs in the community
  • 100+ startup tools built
  • 5,000+ pieces of articles and news written

Partnerships

Fe/male Switch has formed strategic partnerships to enhance its offerings. In January 2022, it teamed up with global website builder Tilda to provide free access to website building tools and mentorship services for Fe/male Switch participants.

Recognition

Fe/male Switch has received media attention for its innovative approach to closing the gender gap in tech entrepreneurship. The platform has been featured in various publications highlighting its unique "play to learn and earn" model.
2025-08-15 09:55 Top Alternatives