Open source focus
Open Source Alternatives to Callfelix
60 open source Voice AI options similar to Callfelix, 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.
Bland64Voice AISan Francisco, United States$51.0MOpen source
Saperly43Voice AISan Francisco, United States$2.0MOpen source
Mirrorfly11Agentic AIOpen source
Vapi65Voice AISan Francisco, United States$74.3MOpen 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
Cekura40Agentic AITel Aviv, IsraelOpen source
Symbl.ai36Voice AISan Francisco, United States$6.4MOpen source
Lionwire17Voice AIOpen source
Metadialogues15Conversational AIOpen source
DhvanixVoice AIBengaluru, IndiaOpen source
LetustalkVoice AIOpen source
GetpointVoice AITel Aviv, IsraelOpen source
IbodycamVoice AIOpen source
- CallrichVoice AI
Open source
Bluebutler42Customer Service AutomationTel Aviv, Israel$12.0MOpen source
Clara Ai40Conversational AISan Francisco, United StatesOpen source
Callbravo34Voice AITel Aviv, Israel$1.5MOpen source
Aquotiq32Conversational AILouth, United KingdomOpen source
Thenvoi AI Ltd31Conversational AILondon, United KingdomOpen source
Jako.ai20EnterpriseTel Aviv, IsraelOpen source
Convo10Voice AISan Francisco, United StatesOpen source
Appquest2Conversational AITel Aviv, IsraelOpen source
Mister WolfAgentic AITel Aviv, IsraelOpen source
LingseeVoice AITel Aviv, IsraelOpen source
CallanoConversational AITel Aviv, IsraelOpen source
IntervyouAI AgentOpen source
- Chisp TechnologiesConversational AITel Aviv, Israel
Open source
TelenowVoice AISan Francisco, United StatesOpen source
RevochatConversational AIOpen source
Kyutai69Frontier AI LabParis, France$300.0MOpen source · Self-hostable
Cartesia64Voice AISan Francisco, United States$191.0MOpen source
Genesys Cloud CX64Contact Center AIDaly City, United States$3.9BOpen source
Resemble AI55Voice AINew York, United States$36.5MOpen source
- OBOBOt AI49Conversational AITel Aviv, Israel$5.0M
Open source
Rasa49Conversational AIBerlin, Germany$13.0MOpen source · Self-hostable
Coqui48Voice AIBerlin, Germany$2.0MOpen source · Self-hostable
- SASales Interaction Agent47Agentic AISan Francisco, United States$5.0M
Open source
Lucida AI46Artificial IntelligenceSan Francisco, United States$7.0MOpen source
- OBoBot.ai45Conversational AITel Aviv, Israel$3.5M
Open source
Hyper44Conversational AISan Francisco, United States$12.3MOpen source
- BLBlip41Voice AISão Paulo, Brazil$10.0M
Open source
FrontSpin38Sales TechnologySan Diego, United StatesOpen source
Akacia35Conversational AITel Aviv, Israel$1.5MOpen source
Tavvo34Conversational AITel Aviv, Israel$4.0MOpen source
Plurai34Conversational AITel Aviv, IsraelOpen source
Regai24Customer ServiceLondon, United KingdomOpen source
Corereflex22Customer Service AutomationTel Aviv, IsraelOpen source
Zenthic15Conversational AISan Francisco, United StatesOpen source
Etherwaves AI14Conversational AIOpen source
evo.ninja12Agentic AIOpen source
Axscore7Customer Service AutomationTel Aviv, IsraelOpen source
Afcor4Customer Service AutomationTel Aviv, IsraelOpen source
RenteragentProptechTel Aviv, IsraelOpen source
- LounehCustomer Service AutomationTel Aviv, Israel
Open source
JottableCustomer Service AutomationSan Francisco, United StatesOpen source
| Company | Sector | License | HQ | Funding | Score |
|---|---|---|---|---|---|
| Bland | Voice AI | Open source | San Francisco, United States | $51.0M | 64 |
| Saperly | Voice AI | Open source | San Francisco, United States | $2.0M | 43 |
| Mirrorfly | Agentic AI | Open source | — | — | 11 |
| Vapi | Voice AI | Open source | San Francisco, United States | $74.3M | 65 |
| 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 |
| Cekura | Agentic AI | Open source | Tel Aviv, Israel | — | 40 |
| Symbl.ai | Voice AI | Open source | San Francisco, United States | $6.4M | 36 |
| Lionwire | Voice AI | Open source | — | — | 17 |
| Metadialogues | Conversational AI | Open source | — | — | 15 |
| Dhvanix | Voice AI | Open source | Bengaluru, India | — | — |
| Letustalk | Voice AI | Open source | — | — | — |
| Getpoint | Voice AI | Open source | Tel Aviv, Israel | — | — |
| Ibodycam | Voice AI | Open source | — | — | — |
| Voice AI | Open source | — | — | — | |
| Bluebutler | Customer Service Automation | Open source | Tel Aviv, Israel | $12.0M | 42 |
| Clara Ai | Conversational AI | Open source | San Francisco, United States | — | 40 |
| Callbravo | Voice AI | Open source | Tel Aviv, Israel | $1.5M | 34 |
| Aquotiq | Conversational AI | Open source | Louth, United Kingdom | — | 32 |
| Thenvoi AI Ltd | Conversational AI | Open source | London, United Kingdom | — | 31 |
| Jako.ai | Enterprise | Open source | Tel Aviv, Israel | — | 20 |
| Convo | Voice AI | Open source | San Francisco, United States | — | 10 |
| Appquest | Conversational AI | Open source | Tel Aviv, Israel | — | 2 |
| Mister Wolf | Agentic AI | Open source | Tel Aviv, Israel | — | — |
| Lingsee | Voice AI | Open source | Tel Aviv, Israel | — | — |
| Callano | Conversational AI | Open source | Tel Aviv, Israel | — | — |
| Intervyou | AI Agent | Open source | — | — | — |
| Conversational AI | Open source | Tel Aviv, Israel | — | — | |
| Telenow | Voice AI | Open source | San Francisco, United States | — | — |
| Revochat | Conversational AI | Open source | — | — | — |
| Kyutai | Frontier AI Lab | Open source · Self-hostable | Paris, France | $300.0M | 69 |
| 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 |
| Resemble AI | Voice AI | Open source | New York, United States | $36.5M | 55 |
| OBOBOt AI | Conversational AI | Open source | Tel Aviv, Israel | $5.0M | 49 |
| Rasa | Conversational AI | Open source · Self-hostable | Berlin, Germany | $13.0M | 49 |
| Coqui | Voice AI | Open source · Self-hostable | Berlin, Germany | $2.0M | 48 |
| SASales Interaction Agent | Agentic AI | Open source | San Francisco, United States | $5.0M | 47 |
| Lucida AI | Artificial Intelligence | Open source | San Francisco, United States | $7.0M | 46 |
| OBoBot.ai | Conversational AI | Open source | Tel Aviv, Israel | $3.5M | 45 |
| Hyper | Conversational AI | Open source | San Francisco, United States | $12.3M | 44 |
| BLBlip | Voice AI | Open source | São Paulo, Brazil | $10.0M | 41 |
| FrontSpin | Sales Technology | Open source | San Diego, United States | — | 38 |
| Akacia | Conversational AI | Open source | Tel Aviv, Israel | $1.5M | 35 |
| Tavvo | Conversational AI | Open source | Tel Aviv, Israel | $4.0M | 34 |
| Plurai | Conversational AI | Open source | Tel Aviv, Israel | — | 34 |
| Regai | Customer Service | Open source | London, United Kingdom | — | 24 |
| Corereflex | Customer Service Automation | Open source | Tel Aviv, Israel | — | 22 |
| Zenthic | Conversational AI | Open source | San Francisco, United States | — | 15 |
| Etherwaves AI | Conversational AI | Open source | — | — | 14 |
| evo.ninja | Agentic AI | Open source | — | — | 12 |
| Axscore | Customer Service Automation | Open source | Tel Aviv, Israel | — | 7 |
| Afcor | Customer Service Automation | Open source | Tel Aviv, Israel | — | 4 |
| Renteragent | Proptech | Open source | Tel Aviv, Israel | — | — |
| Customer Service Automation | Open source | Tel Aviv, Israel | — | — | |
| Jottable | Customer Service Automation | Open source | San Francisco, United States | — | — |