Open source focus
Open Source Alternatives to Willow
60 open source Voice AI options similar to Willow, 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.
superwhisper17Artificial IntelligenceNew York, United StatesOpen source
Symbl.ai36Voice AISan Francisco, United States$6.4MOpen source
Convo10Voice AISan Francisco, United StatesOpen source
IntervyouAI AgentOpen source
Kyutai69Frontier AI LabParis, France$300.0MOpen source · Self-hostable
Deepgram65NeocloudSan Francisco, United States$177.1MOpen source
Vapi65Voice AISan Francisco, United States$74.3MOpen source
Bland64Voice AISan Francisco, United States$51.0MOpen source
Cartesia64Voice AISan Francisco, United States$191.0MOpen source
Cognigy (NICE)63Voice AgentDüsseldorf, GermanyOpen source
Sendbird61Conversational AISan Mateo, United StatesOpen source
Nomi57AI CopilotSan Francisco, United States$180.0MOpen source
Voca.ai54SpeechTel Aviv, Israel$6.1MOpen source
Vocode50Open SourceSan Francisco, United States$3.8MOpen source · Self-hostable
- COCognigy50Voice AgentDüsseldorf, Germany$156.5M
Open source
Coqui48Voice AIBerlin, Germany$2.0MOpen source · Self-hostable
Lucida AI46Artificial IntelligenceSan Francisco, United States$7.0MOpen source
Saperly43Voice AISan Francisco, United States$2.0MOpen source
Cekura40Agentic AITel Aviv, IsraelOpen source
Jako.ai20EnterpriseTel Aviv, IsraelOpen source
Lionwire17Voice AIOpen source
Metadialogues15Conversational AIOpen source
Mirrorfly11Agentic AIOpen source
IbodycamVoice AIOpen source
LingseeVoice AITel Aviv, IsraelOpen source
- FunbuttonVoice AI
Open source
GetpointVoice AITel Aviv, IsraelOpen source
- CallrichVoice AI
Open source
Cluely58Agentic AISan Francisco, United StatesOpen source
Resemble AI55Voice AINew York, United States$36.5MOpen source
CogMe33HealthcareTel Aviv, IsraelOpen source
Omnivore23Consumer AppOpen source · Self-hostable
Recallguru21AI Search EngineOpen source
SynchumanVoice AITel Aviv, IsraelOpen source
RawcandorConversational AITel Aviv, IsraelOpen source
Google Cloud Text-to-SpeechVoice AIMountain View, United StatesOpen source
Weave70Voice AILehi, United StatesOpen source
Genesys Cloud CX64Contact Center AIDaly City, United States$3.9BOpen source
Rasa Technologies GmbH62Conversational AISan Francisco, United States$73.4MOpen source
Elicit62Artificial IntelligenceOakland, United States$31.0MOpen source
Raycast55ProductivityLondon, United Kingdom$17.7MOpen source
Meaning55Artificial IntelligenceTel Aviv, IsraelOpen source
regard54HealthcareSan Francisco, United StatesOpen source
EyeControl54HealthcareTel Aviv, Israel$20.0MOpen source
- 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
SageOx47Artificial IntelligenceSeattle, USA$15.0MOpen source
- OBoBot.ai45Conversational AITel Aviv, Israel$3.5M
Open source
- BLBlip41Voice AISão Paulo, Brazil$10.0M
Open source
Clara Ai40Conversational AISan Francisco, United StatesOpen source
Tryagentically40Agentic AISan Francisco, United StatesOpen source
FrontSpin38Sales TechnologySan Diego, United StatesOpen source
Mycroft35Voice AIKansas City, United States$121.5MOpen source · Self-hostable
Joulix AI Technologies35AI Tools & AppsSan Francisco, Israel$2.3MOpen source
Callbravo34Voice AITel Aviv, Israel$1.5MOpen source
Plurai34Conversational AITel Aviv, IsraelOpen source
Aquotiq32Conversational AILouth, United KingdomOpen source
Thenvoi AI Ltd31Conversational AILondon, United KingdomOpen source
Readwise Reader25Consumer AppRaleigh, United StatesOpen source
| Company | Sector | License | HQ | Funding | Score |
|---|---|---|---|---|---|
| superwhisper | Artificial Intelligence | Open source | New York, United States | — | 17 |
| Symbl.ai | Voice AI | Open source | San Francisco, United States | $6.4M | 36 |
| Convo | Voice AI | Open source | San Francisco, United States | — | 10 |
| Intervyou | AI Agent | Open source | — | — | — |
| Kyutai | Frontier AI Lab | Open source · Self-hostable | Paris, France | $300.0M | 69 |
| Deepgram | Neocloud | Open source | San Francisco, United States | $177.1M | 65 |
| Vapi | Voice AI | Open source | San Francisco, United States | $74.3M | 65 |
| Bland | Voice AI | Open source | San Francisco, United States | $51.0M | 64 |
| Cartesia | Voice AI | Open source | San Francisco, United States | $191.0M | 64 |
| Cognigy (NICE) | Voice Agent | Open source | Düsseldorf, Germany | — | 63 |
| Sendbird | Conversational AI | Open source | San Mateo, United States | — | 61 |
| Nomi | AI Copilot | Open source | San Francisco, United States | $180.0M | 57 |
| Voca.ai | Speech | Open source | Tel Aviv, Israel | $6.1M | 54 |
| Vocode | Open Source | Open source · Self-hostable | San Francisco, United States | $3.8M | 50 |
| COCognigy | Voice Agent | Open source | Düsseldorf, Germany | $156.5M | 50 |
| Coqui | Voice AI | Open source · Self-hostable | Berlin, Germany | $2.0M | 48 |
| Lucida AI | Artificial Intelligence | Open source | San Francisco, United States | $7.0M | 46 |
| Saperly | Voice AI | Open source | San Francisco, United States | $2.0M | 43 |
| Cekura | Agentic AI | Open source | Tel Aviv, Israel | — | 40 |
| Jako.ai | Enterprise | Open source | Tel Aviv, Israel | — | 20 |
| Lionwire | Voice AI | Open source | — | — | 17 |
| Metadialogues | Conversational AI | Open source | — | — | 15 |
| Mirrorfly | Agentic AI | Open source | — | — | 11 |
| Ibodycam | Voice AI | Open source | — | — | — |
| Lingsee | Voice AI | Open source | Tel Aviv, Israel | — | — |
| Voice AI | Open source | — | — | — | |
| Getpoint | Voice AI | Open source | Tel Aviv, Israel | — | — |
| Voice AI | Open source | — | — | — | |
| Cluely | Agentic AI | Open source | San Francisco, United States | — | 58 |
| Resemble AI | Voice AI | Open source | New York, United States | $36.5M | 55 |
| CogMe | Healthcare | Open source | Tel Aviv, Israel | — | 33 |
| Omnivore | Consumer App | Open source · Self-hostable | — | — | 23 |
| Recallguru | AI Search Engine | Open source | — | — | 21 |
| Synchuman | Voice AI | Open source | Tel Aviv, Israel | — | — |
| Rawcandor | Conversational AI | Open source | Tel Aviv, Israel | — | — |
| Google Cloud Text-to-Speech | Voice AI | Open source | Mountain View, United States | — | — |
| Weave | Voice AI | Open source | Lehi, United States | — | 70 |
| 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 |
| Elicit | Artificial Intelligence | Open source | Oakland, United States | $31.0M | 62 |
| Raycast | Productivity | Open source | London, United Kingdom | $17.7M | 55 |
| Meaning | Artificial Intelligence | Open source | Tel Aviv, Israel | — | 55 |
| regard | Healthcare | Open source | San Francisco, United States | — | 54 |
| EyeControl | Healthcare | Open source | Tel Aviv, Israel | $20.0M | 54 |
| 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 |
| SageOx | Artificial Intelligence | Open source | Seattle, USA | $15.0M | 47 |
| OBoBot.ai | Conversational AI | Open source | Tel Aviv, Israel | $3.5M | 45 |
| BLBlip | Voice AI | Open source | São Paulo, Brazil | $10.0M | 41 |
| 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 |
| Mycroft | Voice AI | Open source · Self-hostable | Kansas City, United States | $121.5M | 35 |
| Joulix AI Technologies | AI Tools & Apps | Open source | San Francisco, Israel | $2.3M | 35 |
| Callbravo | Voice AI | Open source | Tel Aviv, Israel | $1.5M | 34 |
| Plurai | Conversational AI | Open source | Tel Aviv, Israel | — | 34 |
| Aquotiq | Conversational AI | Open source | Louth, United Kingdom | — | 32 |
| Thenvoi AI Ltd | Conversational AI | Open source | London, United Kingdom | — | 31 |
| Readwise Reader | Consumer App | Open source | Raleigh, United States | — | 25 |