Open source focus
Open Source Alternatives to VoiceOS
60 open source Voice Agent options similar to VoiceOS, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Each profile notes license and self-hosting where we have it.
ElevenLabs79AILondon, United Kingdom$1.6BOpen source
Vapi65Voice AISan Francisco, United States$74.3MOpen source
Deepgram65NeocloudSan Francisco, United States$177.1MOpen source
Bland64Voice AISan Francisco, United States$51.0MOpen source
Cognigy (NICE)63Voice AgentDüsseldorf, GermanyOpen source
Ultravox.ai52Agentic AISan Francisco, United States$10.0MOpen source
- COCognigy50Voice AgentDüsseldorf, Germany$156.5M
Open source
Coqui48Voice AIBerlin, Germany$2.0MOpen source · Self-hostable
Chaty.ai45AI AgentsGold Coast, Australia$1.0MOpen source
CiaoDott43HealthcareMilan, Italy$1.6MOpen source
Saperly43Voice AISan Francisco, United States$2.0MOpen source
- BLBlip41Voice AISão Paulo, Brazil$10.0M
Open source
Cekura40Agentic AITel Aviv, IsraelOpen source
Mycroft AI38Voice AssistantKansas City, United States$4.0MOpen source · Self-hostable
Magick AI28Agentic AIOpen source
Hume AI25Voice AIUnited StatesOpen source
Lionwire17Voice AIOpen source
Mirrorfly11Agentic AIChennai, IndiaOpen source
CallrichVoice AIOpen source
IbodycamVoice AIOpen source
LetustalkVoice AIOpen source
DhvanixVoice AIBengaluru, IndiaOpen source
GetpointVoice AITel Aviv, IsraelOpen source
Google Cloud Text-to-SpeechVoice AIMountain View, United StatesOpen source
ENERZAiVoice AgentSeoul, South KoreaOpen source
SpaceXAI76Frontier AI LabPalo Alto, United States$90.0BOpen source
Weave70Voice AILehi, United StatesOpen source
Kyutai69Frontier AI LabParis, France$300.0MOpen source · Self-hostable
HeyGen68VideoSan Francisco, United States$42.5MOpen source
Cartesia64Voice AISan Francisco, United States$191.0MOpen source
Genesys Cloud CX64Contact Center AIDaly City, United States$3.9BOpen source
Rasa Technologies GmbH62Conversational AISan Francisco, United States$73.4MOpen source
Sendbird61Conversational AISan Mateo, United StatesOpen source
Cluely58Agentic AISan Francisco, United StatesOpen source
Meaning55Artificial IntelligenceTel Aviv, IsraelOpen source
Nomi55AI CopilotSan Francisco, United States$180.0MOpen source
Resemble AI55Voice AINew York, United States$36.5MOpen source
regard54HealthcareSan Francisco, United StatesOpen source
EyeControl54HealthcareTel Aviv, Israel$20.0MOpen source
Vocode50Open SourceSan Francisco, United States$3.8MOpen source · Self-hostable
- OBOBOt AI49Conversational AITel Aviv, Israel$5.0M
Open source
Rasa49Conversational AIBerlin, Germany$13.0MOpen source · Self-hostable
- SASales Interaction Agent47Agentic AISan Francisco, United States$5.0M
Open source
Lucida AI46Artificial IntelligenceSan Francisco, United States$13.1MOpen source
- OBoBot.ai45Conversational AITel Aviv, Israel$3.5M
Open source
Dante45Artificial Intelligence$1.5MOpen source
Clara Ai40Conversational AISan Francisco, United StatesOpen source
Tryagentically40Agentic AISan Francisco, United StatesOpen source
FrontSpin38Sales TechnologySan Diego, United StatesOpen source
Symbl.ai36Voice AISan Francisco, United States$6.4MOpen source
Mycroft35Voice AIKansas City, United States$121.5MOpen source · Self-hostable
Callbravo34Voice AITel Aviv, Israel$1.5MOpen source
Plurai34Conversational AITel Aviv, IsraelOpen source
Deep AI Technologies34AccelerationOpen source
CogMe33HealthcareTel Aviv, IsraelOpen source
Aquotiq32Conversational AILouth, United KingdomOpen source
Thenvoi AI Ltd31Conversational AILondon, United KingdomOpen source
SweetDream AI25AI GirlfriendIstanbul, TurkeyOpen source
Recallguru21AI Search EngineOpen source
- Anyvoice20Voice AI
Open source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| ElevenLabs | AI | Open source | London, United Kingdom | $1.6B | 79 | |
| Vapi | Voice AI | Open source | San Francisco, United States | $74.3M | 65 | |
| Deepgram | Neocloud | Open source | San Francisco, United States | $177.1M | 65 | |
| Bland | Voice AI | Open source | San Francisco, United States | $51.0M | 64 | |
| Cognigy (NICE) | Voice Agent | Open source | Düsseldorf, Germany | — | 63 | |
| Ultravox.ai | Agentic AI | Open source | San Francisco, United States | $10.0M | 52 | |
| COCognigy | Voice Agent | Open source | Düsseldorf, Germany | $156.5M | 50 | |
| Coqui | Voice AI | Open source · Self-hostable | Berlin, Germany | $2.0M | 48 | |
| Chaty.ai | AI Agents | Open source | Gold Coast, Australia | $1.0M | 45 | |
| CiaoDott | Healthcare | Open source | Milan, Italy | $1.6M | 43 | |
| Saperly | Voice AI | Open source | San Francisco, United States | $2.0M | 43 | |
| BLBlip | Voice AI | Open source | São Paulo, Brazil | $10.0M | 41 | |
| Cekura | Agentic AI | Open source | Tel Aviv, Israel | — | 40 | |
| Mycroft AI | Voice Assistant | Open source · Self-hostable | Kansas City, United States | $4.0M | 38 | |
| Magick AI | Agentic AI | Open source | — | — | 28 | |
| Hume AI | Voice AI | Open source | United States | — | 25 | |
| Lionwire | Voice AI | Open source | — | — | 17 | |
| Mirrorfly | Agentic AI | Open source | Chennai, India | — | 11 | |
| Callrich | Voice AI | Open source | — | — | — | |
| Ibodycam | Voice AI | Open source | — | — | — | |
| Letustalk | Voice AI | Open source | — | — | — | |
| Dhvanix | Voice AI | Open source | Bengaluru, India | — | — | |
| Getpoint | Voice AI | Open source | Tel Aviv, Israel | — | — | |
| Google Cloud Text-to-Speech | Voice AI | Open source | Mountain View, United States | — | — | |
| ENERZAi | Voice Agent | Open source | Seoul, South Korea | — | — | |
| SpaceXAI | Frontier AI Lab | Open source | Palo Alto, United States | $90.0B | 76 | |
| Weave | Voice AI | Open source | Lehi, United States | — | 70 | |
| Kyutai | Frontier AI Lab | Open source · Self-hostable | Paris, France | $300.0M | 69 | |
| HeyGen | Video | Open source | San Francisco, United States | $42.5M | 68 | |
| Cartesia | Voice AI | Open source | San Francisco, United States | $191.0M | 64 | |
| Genesys Cloud CX | Contact Center AI | Open source | Daly City, United States | $3.9B | 64 | |
| Rasa Technologies GmbH | Conversational AI | Open source | San Francisco, United States | $73.4M | 62 | |
| Sendbird | Conversational AI | Open source | San Mateo, United States | — | 61 | |
| Cluely | Agentic AI | Open source | San Francisco, United States | — | 58 | |
| Meaning | Artificial Intelligence | Open source | Tel Aviv, Israel | — | 55 | |
| Nomi | AI Copilot | Open source | San Francisco, United States | $180.0M | 55 | |
| Resemble AI | Voice AI | Open source | New York, United States | $36.5M | 55 | |
| regard | Healthcare | Open source | San Francisco, United States | — | 54 | |
| EyeControl | Healthcare | Open source | Tel Aviv, Israel | $20.0M | 54 | |
| Vocode | Open Source | Open source · Self-hostable | San Francisco, United States | $3.8M | 50 | |
| OBOBOt AI | Conversational AI | Open source | Tel Aviv, Israel | $5.0M | 49 | |
| Rasa | Conversational AI | Open source · Self-hostable | Berlin, Germany | $13.0M | 49 | |
| SASales Interaction Agent | Agentic AI | Open source | San Francisco, United States | $5.0M | 47 | |
| Lucida AI | Artificial Intelligence | Open source | San Francisco, United States | $13.1M | 46 | |
| OBoBot.ai | Conversational AI | Open source | Tel Aviv, Israel | $3.5M | 45 | |
| Dante | Artificial Intelligence | Open source | — | $1.5M | 45 | |
| Clara Ai | Conversational AI | Open source | San Francisco, United States | — | 40 | |
| Tryagentically | Agentic AI | Open source | San Francisco, United States | — | 40 | |
| FrontSpin | Sales Technology | Open source | San Diego, United States | — | 38 | |
| Symbl.ai | Voice AI | Open source | San Francisco, United States | $6.4M | 36 | |
| Mycroft | Voice AI | Open source · Self-hostable | Kansas City, United States | $121.5M | 35 | |
| Callbravo | Voice AI | Open source | Tel Aviv, Israel | $1.5M | 34 | |
| Plurai | Conversational AI | Open source | Tel Aviv, Israel | — | 34 | |
| Deep AI Technologies | Acceleration | Open source | — | — | 34 | |
| CogMe | Healthcare | Open source | Tel Aviv, Israel | — | 33 | |
| Aquotiq | Conversational AI | Open source | Louth, United Kingdom | — | 32 | |
| Thenvoi AI Ltd | Conversational AI | Open source | London, United Kingdom | — | 31 | |
| SweetDream AI | AI Girlfriend | Open source | Istanbul, Turkey | — | 25 | |
| Recallguru | AI Search Engine | Open source | — | — | 21 | |
| Voice AI | Open source | — | — | 20 |