Hosted Service
Agents & OrchestrationAutomation & Integration
Vapi
1Developer 2API 3platform 4for 5voice 6agents
the six Ws · specification
W1
Who
Built by Vapi for developers building customer support, sales, and scheduling voice agents.
W2
What
Provides an API-first platform to configure voice, conversation flow, telephony, and third-party integrations for voice agents.
W3
Where
Accessed through Vapi's API and dashboard, connecting to providers like OpenAI, Anthropic, and Twilio.
W4
When
Founded around 2023 and raised a Series B funding round in 2025, active through 2026.
W5
Why
Gives developers infrastructure to move from prompt to production voice agent quickly.
W6
With
Depends on connected LLM, speech, and telephony providers configured through the Vapi platform.
W7
Watch
Commercial hosted service, closed source, voice and conversation data are processed through Vapi's cloud orchestration layer.
voice agentsAPI-firsttelephonydeveloper platformorchestration