--- title: "fastrtc vs obs-localvocal" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/gradio-app-fastrtc-vs-royshil-obs-localvocal" tools: ["gradio-app-fastrtc", "royshil-obs-localvocal"] --- # fastrtc vs obs-localvocal *GraphCanon updated Jul 30, 2026* ## Verdict Pick fastrtc if fastrtc is a Python library offering real-time communication capabilities such as pause detection and text-to-speech; pick obs-localvocal if obs-localvocal is an OBS plugin enabling real-time speech-to-text transcription and translation using AI models that run locally. [fastrtc](https://fastrtc.org/) reports 4.6k GitHub stars, 434 forks, and 79 open issues, last pushed Jan 12, 2026. [obs-localvocal](https://obsproject.com/forum/resources/localvocal-live-stream-ai-assistant.1769/) has 1.6k stars, 120 forks, and 55 open issues, last pushed May 20, 2026. Figures are from public GitHub metadata via [fastrtc's repository](https://github.com/gradio-app/fastrtc) and [obs-localvocal's repository](https://github.com/royshil/obs-localvocal). | | [fastrtc](/tools/gradio-app-fastrtc.md) | [obs-localvocal](/tools/royshil-obs-localvocal.md) | | --- | --- | --- | | Tagline | The python library for real-time communication | An OBS plugin for local speech recognition and captioning | | Stars | 4,619 | 1,561 | | Forks | 434 | 120 | | Open issues | 79 | 55 | | Language | JavaScript | C++ | | Adopt for | fastrtc is a Python library offering real-time communication capabilities such as pause detection and text-to-speech. | Obs-localvocal is an OBS plugin enabling real-time speech-to-text transcription and translation using AI models that run locally. | | Persona | - | - | | Runtime | - | - | | License | MIT | GPL-2.0 | | Categories | Speech & Audio | Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [fastrtc](/tools/gradio-app-fastrtc.md) | [obs-localvocal](/tools/royshil-obs-localvocal.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Steady (60%) | | Days since push | 197d | 71d | | Open issues (now) | 79 | 55 | | Owner type | Organization | User | | Full report | [trust report](/tools/gradio-app-fastrtc/trust.md) | [trust report](/tools/royshil-obs-localvocal/trust.md) | ## Decision facts: fastrtc - **Adopt for:** fastrtc is a Python library offering real-time communication capabilities such as pause detection and text-to-speech. ## Decision facts: obs-localvocal - **Requirements:** The software operates on Windows, Linux (Ubuntu 22.04), and MacOS environments.; Support for translation is included using CTranslate2. - **Adopt for:** Obs-localvocal is an OBS plugin enabling real-time speech-to-text transcription and translation using AI models that run locally. - **License detail:** GPL-2.0 ## Choose when ### Choose fastrtc if… - fastrtc is primarily JavaScript; obs-localvocal is C++. - License: fastrtc is MIT, obs-localvocal is GPL-2.0. - Tags unique to fastrtc: artificial-intelligence, hacktoberfest, hacktoberfest2025, llm. - Use fastrtc for projects that require pause detection in audio streams as it provides the specific ReplyOnPause feature. ### Choose obs-localvocal if… - obs-localvocal is primarily C++; fastrtc is JavaScript. - License: obs-localvocal is GPL-2.0, fastrtc is MIT. - Requirements: The software operates on Windows, Linux (Ubuntu 22.04), and MacOS environments.; Support for translation is included using CTranslate2.. - Tags unique to obs-localvocal: ai, live-streaming, obs-plugin, transcription. - When you require privacy-first solutions where all processing of audio and data occurs on the local machine without any cloud-based services. ## When NOT to use fastrtc - Avoid fastrtc when the project requires real-time communication features not covered by its pause detection or text-to-speech services. - Do not use fastrtc if support for multiple languages beyond what Python and this library's built-in features provide is necessary. ## When NOT to use obs-localvocal - If your workflow demands GPU acceleration for better performance, given obs-localvocal focuses primarily on CPU but offers limited GPU support. - In scenarios where you need to integrate directly with cloud-hosted services or APIs, since this plugin processes everything locally without internet dependency. ## Common questions ### What is the difference between fastrtc and obs-localvocal? fastrtc: The python library for real-time communication. obs-localvocal: An OBS plugin for local speech recognition and captioning. See the comparison table for live GitHub stats and shared categories. ### When should I choose fastrtc over obs-localvocal? Choose fastrtc over obs-localvocal when fastrtc is primarily JavaScript; obs-localvocal is C++; License: fastrtc is MIT, obs-localvocal is GPL-2.0; Tags unique to fastrtc: artificial-intelligence, hacktoberfest, hacktoberfest2025, llm; Use fastrtc for projects that require pause detection in audio streams as it provides the specific ReplyOnPause feature. ### When should I choose obs-localvocal over fastrtc? Choose obs-localvocal over fastrtc when obs-localvocal is primarily C++; fastrtc is JavaScript; License: obs-localvocal is GPL-2.0, fastrtc is MIT; Requirements: The software operates on Windows, Linux (Ubuntu 22.04), and MacOS environments.; Support for translation is included using CTranslate2.; Tags unique to obs-localvocal: ai, live-streaming, obs-plugin, transcription; When you require privacy-first solutions where all processing of audio and data occurs on the local machine without any cloud-based services. ### When should I avoid fastrtc? Avoid fastrtc when the project requires real-time communication features not covered by its pause detection or text-to-speech services. Do not use fastrtc if support for multiple languages beyond what Python and this library's built-in features provide is necessary. ### When should I avoid obs-localvocal? If your workflow demands GPU acceleration for better performance, given obs-localvocal focuses primarily on CPU but offers limited GPU support. In scenarios where you need to integrate directly with cloud-hosted services or APIs, since this plugin processes everything locally without internet dependency. ### Is fastrtc or obs-localvocal more popular on GitHub? fastrtc has more GitHub stars (4,619 vs 1,561). Stars measure visibility, not whether either tool fits your constraints. ### Are fastrtc and obs-localvocal open source? Yes - both are open-source projects on GitHub (fastrtc: MIT, obs-localvocal: GPL-2.0). ### Where can I find alternatives to fastrtc or obs-localvocal? GraphCanon lists graph-backed alternatives at [fastrtc alternatives](/tools/gradio-app-fastrtc/alternatives) and [obs-localvocal alternatives](/tools/royshil-obs-localvocal/alternatives) ([fastrtc markdown twin](/tools/gradio-app-fastrtc/alternatives.md), [obs-localvocal markdown twin](/tools/royshil-obs-localvocal/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/gradio-app-fastrtc-vs-royshil-obs-localvocal.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, fastrtc or obs-localvocal? fastrtc: Slowing. obs-localvocal: 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 fastrtc and obs-localvocal? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [fastrtc trust report](/tools/gradio-app-fastrtc/trust); [obs-localvocal trust report](/tools/royshil-obs-localvocal/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=gradio-app-fastrtc`](/api/graphcanon/graph?tool=gradio-app-fastrtc) - 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/_