--- title: "vosk-api vs Chatterbox-TTS-Server" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/alphacep-vosk-api-vs-devnen-chatterbox-tts-server" tools: ["alphacep-vosk-api", "devnen-chatterbox-tts-server"] --- # vosk-api vs Chatterbox-TTS-Server *GraphCanon updated Jul 30, 2026* ## Verdict Pick vosk-api if vosk-api is an offline speech recognition toolkit enabling continuous large-vocabulary transcription for over 20 languages, fitting onto small devices while offering speaker identification; pick Chatterbox-TTS-Server if chatterbox-TTS-Server: Self-hostable TTS solution with Web UI, APIs, voice cloning, and large-scale text support across CUDA, ROCm, CPU. [vosk-api](https://github.com/alphacep/vosk-api) reports 15k GitHub stars, 1.7k forks, and 600 open issues, last pushed Jul 2, 2026. [Chatterbox-TTS-Server](https://colab.research.google.com/github/devnen/Chatterbox-TTS-Server/blob/main/Chatterbox_TTS_Colab_Demo.ipynb) has 1.4k stars, 333 forks, and 45 open issues, last pushed May 26, 2026. Figures are from public GitHub metadata via [vosk-api's repository](https://github.com/alphacep/vosk-api) and [Chatterbox-TTS-Server's repository](https://github.com/devnen/Chatterbox-TTS-Server). | | [vosk-api](/tools/alphacep-vosk-api.md) | [Chatterbox-TTS-Server](/tools/devnen-chatterbox-tts-server.md) | | --- | --- | --- | | Tagline | Offline speech recognition API | Self-host the Chatterbox TTS model with a user-friendly Web UI and flexible API endpoints | | Stars | 15,013 | 1,379 | | Forks | 1,740 | 333 | | Open issues | 600 | 45 | | Language | Jupyter Notebook | Python | | Adopt for | Vosk-api is an offline speech recognition toolkit enabling continuous large-vocabulary transcription for over 20 languages, fitting onto small devices while offering speaker identification. | Chatterbox-TTS-Server: Self-hostable TTS solution with Web UI, APIs, voice cloning, and large-scale text support across CUDA, ROCm, CPU. | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | MIT License, open-source with permissive terms for modification and distribution. | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [vosk-api](/tools/alphacep-vosk-api.md) | [Chatterbox-TTS-Server](/tools/devnen-chatterbox-tts-server.md) | | --- | --- | --- | | Maintenance | Active (82%) | Steady (60%) | | Days since push | 27d | 64d | | Open issues (now) | 600 | 45 | | Owner type | Organization | User | | Full report | [trust report](/tools/alphacep-vosk-api/trust.md) | [trust report](/tools/devnen-chatterbox-tts-server/trust.md) | ## Shared compatibility - **Python**: [vosk-api](/tools/alphacep-vosk-api.md) - Python runtime; [Chatterbox-TTS-Server](/tools/devnen-chatterbox-tts-server.md) - Python runtime ## Decision facts: vosk-api - **Adopt for:** Vosk-api is an offline speech recognition toolkit enabling continuous large-vocabulary transcription for over 20 languages, fitting onto small devices while offering speaker identification. ## Decision facts: Chatterbox-TTS-Server - **Requirements:** Python 3.10 needed for pre-built wheels; avoid Python >=3.11 due to lack of support.; Ensure hardware and driver meets the Hardware Compatibility Matrix requirements. - **Adopt for:** Chatterbox-TTS-Server: Self-hostable TTS solution with Web UI, APIs, voice cloning, and large-scale text support across CUDA, ROCm, CPU. - **License detail:** MIT License, open-source with permissive terms for modification and distribution. ## Choose when ### Choose vosk-api if… - vosk-api is primarily Jupyter Notebook; Chatterbox-TTS-Server is Python. - License: vosk-api is Apache-2.0, Chatterbox-TTS-Server is MIT. - Tags unique to vosk-api: android, asr, deep-learning, deeplearning. - When offline operation is required as Vosk operates without internet connection ### Choose Chatterbox-TTS-Server if… - Chatterbox-TTS-Server is primarily Python; vosk-api is Jupyter Notebook. - License: Chatterbox-TTS-Server is MIT, vosk-api is Apache-2.0. - Requirements: Python 3.10 needed for pre-built wheels; avoid Python >=3.11 due to lack of support.; Ensure hardware and driver meets the Hardware Compatibility Matrix requirements.. - Tags unique to Chatterbox-TTS-Server: ai, api-server, audio-generation, chatterbox. - Chatterbox-TTS-Server ships Docker support for self-hosted deployment. - You need a self-hosted Text-to-Speech service that supports advanced features like voice cloning. ## When NOT to use vosk-api - When the project requires real-time transcription with high accuracy, possibly surpassing Vosk's performance limitations - For projects limited to languages not currently supported by Vosk's model lineup - If the application necessitates a cloud solution or benefits from regular over-the-air updates and improvements ## When NOT to use Chatterbox-TTS-Server - When only pre-built wheels and no flexibility with Python versions is required (strictly follows Python 3.10). - If your hardware or OS lacks support detailed in the compatibility matrix, like unsupported GPUs/CPU setups. - For projects requiring minimal dependencies without manual handling of installation intricacies. ## Common questions ### What is the difference between vosk-api and Chatterbox-TTS-Server? vosk-api: Offline speech recognition API. Chatterbox-TTS-Server: Self-host the Chatterbox TTS model with a user-friendly Web UI and flexible API endpoints. See the comparison table for live GitHub stats and shared categories. ### When should I choose vosk-api over Chatterbox-TTS-Server? Choose vosk-api over Chatterbox-TTS-Server when vosk-api is primarily Jupyter Notebook; Chatterbox-TTS-Server is Python; License: vosk-api is Apache-2.0, Chatterbox-TTS-Server is MIT; Tags unique to vosk-api: android, asr, deep-learning, deeplearning; When offline operation is required as Vosk operates without internet connection. ### When should I choose Chatterbox-TTS-Server over vosk-api? Choose Chatterbox-TTS-Server over vosk-api when Chatterbox-TTS-Server is primarily Python; vosk-api is Jupyter Notebook; License: Chatterbox-TTS-Server is MIT, vosk-api is Apache-2.0; Requirements: Python 3.10 needed for pre-built wheels; avoid Python >=3.11 due to lack of support.; Ensure hardware and driver meets the Hardware Compatibility Matrix requirements.; Tags unique to Chatterbox-TTS-Server: ai, api-server, audio-generation, chatterbox; Chatterbox-TTS-Server ships Docker support for self-hosted deployment; You need a self-hosted Text-to-Speech service that supports advanced features like voice cloning. ### When should I avoid vosk-api? When the project requires real-time transcription with high accuracy, possibly surpassing Vosk's performance limitations For projects limited to languages not currently supported by Vosk's model lineup If the application necessitates a cloud solution or benefits from regular over-the-air updates and improvements ### When should I avoid Chatterbox-TTS-Server? When only pre-built wheels and no flexibility with Python versions is required (strictly follows Python 3.10). If your hardware or OS lacks support detailed in the compatibility matrix, like unsupported GPUs/CPU setups. For projects requiring minimal dependencies without manual handling of installation intricacies. ### Is vosk-api or Chatterbox-TTS-Server more popular on GitHub? vosk-api has more GitHub stars (15,013 vs 1,379). Stars measure visibility, not whether either tool fits your constraints. ### Are vosk-api and Chatterbox-TTS-Server open source? Yes - both are open-source projects on GitHub (vosk-api: Apache-2.0, Chatterbox-TTS-Server: MIT). ### Where can I find alternatives to vosk-api or Chatterbox-TTS-Server? GraphCanon lists graph-backed alternatives at [vosk-api alternatives](/tools/alphacep-vosk-api/alternatives) and [Chatterbox-TTS-Server alternatives](/tools/devnen-chatterbox-tts-server/alternatives) ([vosk-api markdown twin](/tools/alphacep-vosk-api/alternatives.md), [Chatterbox-TTS-Server markdown twin](/tools/devnen-chatterbox-tts-server/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/alphacep-vosk-api-vs-devnen-chatterbox-tts-server.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, vosk-api or Chatterbox-TTS-Server? vosk-api: Active. Chatterbox-TTS-Server: Steady. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for vosk-api and Chatterbox-TTS-Server? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [vosk-api trust report](/tools/alphacep-vosk-api/trust); [Chatterbox-TTS-Server trust report](/tools/devnen-chatterbox-tts-server/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=alphacep-vosk-api`](/api/graphcanon/graph?tool=alphacep-vosk-api) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_