Vapi
Vapi is a developer-centric platform for building, testing, and deploying voice AI agents.
Free + paidcliwebdesktopLLM-basedMultimodal
Visit websitevapi.ai
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Vapi is a developer-centric platform for building, testing, and deploying voice AI agents. It provides a configurable API that supports over 100 languages and allows users to bring their own LLM, transcription, or text-to-speech models. Key capabilities include simulation test suites to identify hallucination risks before production, function calling for API tool integration, and A/B testing for optimizing prompts and flows. The platform scales to millions of calls with enterprise-grade security, catering to startups and large enterprises automating phone operations.
Key features
- Multilingual support for 100+ languages
- Bring Your Own Key (BYOK) for custom LLM, TTS, and transcription models
- Simulation test suites to identify hallucination risks
- Function calling to integrate external APIs as tools
- A/B testing for prompts, voices, and flows
Pricing
Use cases
- Automating high-volume phone operations
- Inbound call handling and routing
- Real-time customer data retrieval via API
Who it is for
Developerssoftware teams
Integrations
TwilioVonagePlivoOpenAIElevenLabsDeepgramAssemblyAIGroqClaudeGoogle Gemini
Tags
API
How we verified this
Company, pricing, and feature details come from the primary sources below and our latest verification pass. When sources disagree, the official source and the most recent check win.
Last verified 09/02/2026Verified sources: 2
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