Vapi is a developer platform for building, testing, and deploying voice AI agents, offering an API-first design, sub-500ms latency, and enterprise-grade compliance.
About
Vapi is a voice AI platform for developers who need to build, test, and deploy conversational voice agents. Instead of assembling transcription, language models, text-to-speech, and telephony infrastructure separately, teams can configure an entire agent in one place and move from prompt to production quickly. The company states that its platform has supported over one billion calls and that more than one million developers have launched agents with it.
The platform is API-native: developers control the voice, conversation flow, models, and integrations through configuration and code, and Vapi handles the underlying infrastructure. It supports bring-your-own models for transcription, LLMs, and text-to-speech, along with tool calling so agents can fetch data or trigger actions in external systems. Real-time monitoring, testing suites, and A/B testing tools help teams refine agents after deployment. Vapi, Inc. also offers enterprise capabilities including SSO, RBAC, SOC 2, HIPAA, and PCI compliance.
Key Features
Pricing & Fees
- Pricing: A free tier includes $5 in credits, 2 organizations, 1 Vapi phone number, 4 concurrent calls, and 14 days of raw data retention with usage-based per-minute charges. Paid success packages are Core at $29/month, Pro at $999/month minimum (or 10% of the hosting fee), and Premier by contacting sales. Per-minute provider costs apply, such as Deepgram transcription at $0.0095–$0.0099/min.
- Free tier available: Users can start for free and pay only for the minutes consumed; no minimum minutes are required.
- HIPAA add-on: HIPAA-eligible data handling with a standard DPA and Business Associate Agreement costs $2,000/month.
- Uptime guarantees: Pro includes a 99% uptime SLA, while Premier includes 99.9%; the company reports 99.9% uptime for enterprise clients.
Who It's For
Vapi is aimed primarily at developers and engineering teams building voice agents for products or internal operations. Typical use cases include customer support automation, lead qualification, appointment scheduling, and outbound calling. Startup teams can use the free tier and Core plan to prototype, while production teams at larger companies can rely on Pro and Premier packages with SLAs, RBAC, and compliance options. Published case studies span healthcare (over one million calls per month), automotive marketplaces, staffing, and customer support organizations.
FAQ
What is Vapi?Vapi is a developer platform for building, testing, and deploying voice AI agents, combining orchestration, telephony, monitoring, and model configuration in one API-native product.
Is Vapi free to start?Yes, Vapi offers a free tier with $5 in credits, full platform access, and pay-as-you-go per-minute billing, with no minimum minutes required.
What integrations and platforms does Vapi support?Vapi provides a REST API, SDKs for multiple languages, a CLI, webhooks, and tool calling, plus telephony options including Vapi SIP, Twilio, Vonage, and Telnyx.
Is Vapi suitable for regulated industries?Yes, Vapi is SOC 2, HIPAA, and PCI compliant, with HIPAA-eligible data handling available as a paid add-on including a Business Associate Agreement.
What are Vapi's latency and scale figures?Vapi reports sub-500ms average latency, over one billion calls supported, 2.5 million+ agents launched, and 99.9% uptime for enterprise clients.
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