Open Source Alternatives to Carlum
6 open source Voice AI options similar to Carlum, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.
Vocode50Open SourceSan Francisco, United States$3.8MOpen-source library for building hyper-realistic voice agents and conversational AI applications.
Open source · Self-hostable
Coqui48Voice AIBerlin, Germany$2.0MOpen-source AI models for voice synthesis, translation, and TTS.
Open source · Self-hostable
Rasa49Conversational AIBerlin, Germany$13.0MOpen-source conversational AI platform for building custom chatbots and virtual assistants.
Open source · Self-hostable
Talkcan7Open SourceAn open-source programmable walkie-talkie for routing voice through configurable channels.
Open source
Kyutai68Frontier AI LabParis, France$300.0MA non-profit AI research lab focused on open science and developing advanced multimodal and voice AI models.
Open source · Self-hostable
cal.com41Scheduling SoftwareBerlin, GermanyOpen-source scheduling infrastructure for individuals, businesses, and developers.
Open source · Self-hostable
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| VocodeOpen-source library for building hyper-realistic voice agents and conversational AI applications. | Open Source | Open source · Self-hostable | San Francisco, United States | $3.8M | 50 | |
| CoquiOpen-source AI models for voice synthesis, translation, and TTS. | Voice AI | Open source · Self-hostable | Berlin, Germany | $2.0M | 48 | |
| RasaOpen-source conversational AI platform for building custom chatbots and virtual assistants. | Conversational AI | Open source · Self-hostable | Berlin, Germany | $13.0M | 49 | |
| TalkcanAn open-source programmable walkie-talkie for routing voice through configurable channels. | Open Source | Open source | — | — | 7 | |
| KyutaiA non-profit AI research lab focused on open science and developing advanced multimodal and voice AI models. | Frontier AI Lab | Open source · Self-hostable | Paris, France | $300.0M | 68 | |
| cal.comOpen-source scheduling infrastructure for individuals, businesses, and developers. | Scheduling Software | Open source · Self-hostable | Berlin, Germany | — | 41 |