Open source focus
Open Source Alternatives to Nuntius (YC S25)
60 open source AI Communications Platform options similar to Nuntius (YC S25), 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.
Mirrorfly11Agentic AIChennai, IndiaOpen source
XallarapConversational AIOpen source
Bland64Voice AISan Francisco, United States$51.0MOpen source
Cognigy (NICE)63Voice AgentDüsseldorf, GermanyOpen source
Saperly43Voice AISan Francisco, United States$2.0MOpen source
Aquotiq28Conversational AILouth, United KingdomOpen source
Darim17Conversational AIOpen source
TelenowVoice AIOpen source
LetustalkVoice AIOpen source
DhvanixVoice AIOpen source
MoriwaConversational AIOpen source
Mister WolfAgentic AIOpen source
RevochatConversational AIOpen source
- Chisp TechnologiesConversational AITel Aviv, Israel
Open source
Genesys Cloud CX64Contact Center AIDaly City, United States$3.9BOpen source
Sendbird61Conversational AISan Mateo, United StatesOpen source
- COCognigy49Voice AgentDüsseldorf, Germany$156.5M
Open source
- OBoBot.ai45Conversational AITel Aviv, Israel$3.5M
Open source
- BLBlip42Voice AISão Paulo, Brazil$10.0M
Open source
Clara Ai35Conversational AIOpen source
Callbravo35Voice AI$1.5MOpen source
Thenvoi AI Ltd21Conversational AILondon, United KingdomOpen source
Lionwire17Voice AIOpen source
Zenthic15Conversational AISan Francisco, United StatesOpen source
Etherwaves AI14Conversational AIOpen source
Appquest2Conversational AIOpen source
GetpointVoice AIOpen source
PipclawAI AgentOpen source
DomulisConversational AIOpen source
Vapi65Voice AISan Francisco, United States$74.3MOpen source
- SASales Interaction Agent49Agentic AISan Francisco, United States$5.0M
Open source
- OBOBOt AI49Conversational AITel Aviv, Israel$5.0M
Open source
Dante45Artificial Intelligence$1.5MOpen source
Bluebutler42Customer Service Automation$12.0MOpen source
Hyper41Conversational AISan Francisco, United States$12.3MOpen source
Cekura40Agentic AITel Aviv, IsraelOpen source
Tavvo36Conversational AI$4.0MOpen source
Akacia35Conversational AI$1.5MOpen source
Plurai34Conversational AITel Aviv, IsraelOpen source
Corereflex17Customer Service AutomationOpen source
Metadialogues17Conversational AIOpen source
Onenexa17Conversational AIOpen source
Axscore7Customer Service AutomationOpen source
Afcor4Customer Service AutomationOpen source
RitonaAI AgentOpen source
QmogConversational AIOpen source
IbodycamVoice AIOpen source
OceanyxConversational AIOpen source
KaaiaConversational AIOpen source
LetscConversational AIOpen source
Coworker.aiHR TechOpen source
ZentokConversational AIOpen source
- LounehCustomer Service Automation
Open source
VyceraConversational AIOpen source
EastlawnConversational AIOpen source
KedmahConversational AIOpen source
CallrichVoice AIOpen source
ConkoreConversational AIOpen source
CallanoConversational AIOpen source
KaaderConversational AIOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Mirrorfly | Agentic AI | Open source | Chennai, India | — | 11 | |
| Xallarap | Conversational AI | Open source | — | — | — | |
| Bland | Voice AI | Open source | San Francisco, United States | $51.0M | 64 | |
| Cognigy (NICE) | Voice Agent | Open source | Düsseldorf, Germany | — | 63 | |
| Saperly | Voice AI | Open source | San Francisco, United States | $2.0M | 43 | |
| Aquotiq | Conversational AI | Open source | Louth, United Kingdom | — | 28 | |
| Darim | Conversational AI | Open source | — | — | 17 | |
| Telenow | Voice AI | Open source | — | — | — | |
| Letustalk | Voice AI | Open source | — | — | — | |
| Dhvanix | Voice AI | Open source | — | — | — | |
| Moriwa | Conversational AI | Open source | — | — | — | |
| Mister Wolf | Agentic AI | Open source | — | — | — | |
| Revochat | Conversational AI | Open source | — | — | — | |
| Conversational AI | Open source | Tel Aviv, Israel | — | — | ||
| Genesys Cloud CX | Contact Center AI | Open source | Daly City, United States | $3.9B | 64 | |
| Sendbird | Conversational AI | Open source | San Mateo, United States | — | 61 | |
| COCognigy | Voice Agent | Open source | Düsseldorf, Germany | $156.5M | 49 | |
| OBoBot.ai | Conversational AI | Open source | Tel Aviv, Israel | $3.5M | 45 | |
| BLBlip | Voice AI | Open source | São Paulo, Brazil | $10.0M | 42 | |
| Clara Ai | Conversational AI | Open source | — | — | 35 | |
| Callbravo | Voice AI | Open source | — | $1.5M | 35 | |
| Thenvoi AI Ltd | Conversational AI | Open source | London, United Kingdom | — | 21 | |
| Lionwire | Voice AI | Open source | — | — | 17 | |
| Zenthic | Conversational AI | Open source | San Francisco, United States | — | 15 | |
| Etherwaves AI | Conversational AI | Open source | — | — | 14 | |
| Appquest | Conversational AI | Open source | — | — | 2 | |
| Getpoint | Voice AI | Open source | — | — | — | |
| Pipclaw | AI Agent | Open source | — | — | — | |
| Domulis | Conversational AI | Open source | — | — | — | |
| Vapi | Voice AI | Open source | San Francisco, United States | $74.3M | 65 | |
| SASales Interaction Agent | Agentic AI | Open source | San Francisco, United States | $5.0M | 49 | |
| OBOBOt AI | Conversational AI | Open source | Tel Aviv, Israel | $5.0M | 49 | |
| Dante | Artificial Intelligence | Open source | — | $1.5M | 45 | |
| Bluebutler | Customer Service Automation | Open source | — | $12.0M | 42 | |
| Hyper | Conversational AI | Open source | San Francisco, United States | $12.3M | 41 | |
| Cekura | Agentic AI | Open source | Tel Aviv, Israel | — | 40 | |
| Tavvo | Conversational AI | Open source | — | $4.0M | 36 | |
| Akacia | Conversational AI | Open source | — | $1.5M | 35 | |
| Plurai | Conversational AI | Open source | Tel Aviv, Israel | — | 34 | |
| Corereflex | Customer Service Automation | Open source | — | — | 17 | |
| Metadialogues | Conversational AI | Open source | — | — | 17 | |
| Onenexa | Conversational AI | Open source | — | — | 17 | |
| Axscore | Customer Service Automation | Open source | — | — | 7 | |
| Afcor | Customer Service Automation | Open source | — | — | 4 | |
| Ritona | AI Agent | Open source | — | — | — | |
| Qmog | Conversational AI | Open source | — | — | — | |
| Ibodycam | Voice AI | Open source | — | — | — | |
| Oceanyx | Conversational AI | Open source | — | — | — | |
| Kaaia | Conversational AI | Open source | — | — | — | |
| Letsc | Conversational AI | Open source | — | — | — | |
| Coworker.ai | HR Tech | Open source | — | — | — | |
| Zentok | Conversational AI | Open source | — | — | — | |
| Customer Service Automation | Open source | — | — | — | ||
| Vycera | Conversational AI | Open source | — | — | — | |
| Eastlawn | Conversational AI | Open source | — | — | — | |
| Kedmah | Conversational AI | Open source | — | — | — | |
| Callrich | Voice AI | Open source | — | — | — | |
| Conkore | Conversational AI | Open source | — | — | — | |
| Callano | Conversational AI | Open source | — | — | — | |
| Kaader | Conversational AI | Open source | — | — | — |