Voice AI infrastructure for builders — 2026
Deep control and
flexibility for all builders
Ship voice agents with the precision of code and the speed of no-code. Multilingual, testable, and fully yours.
No credit card required · Free tier available · vapi.click
Everything you need to ship
A complete platform for voice AI — from prototype to production.
Multilingual
Talk to agents in English, Spanish, Mandarin, or one of 100+ other supported languages.
Automated testing
Design test suites to identify hallucination risk before going to production.
Tool calling
Intelligently access data and perform actions across your applications.
Reporting & Analytics
Dashboards and exports to track performance, usage, and conversation quality.
Bring your own models
Bring your own API keys for transcription, LLM, or TTS — or plug in your own self-hosted models.
A/B experiments
Test different variations of prompts, voices, and flows to continuously optimize performance.
Built for developers who demand control
VAPI gives you granular control over every layer of the voice stack — transcription, reasoning, synthesis, and orchestration. Wire up custom tools, swap models on the fly, and ship with confidence.
- Real-time WebSocket & telephony APIs
- Custom function calling & webhooks
- Enterprise-grade security & compliance
- Self-hosted deployment options
100+
Languages supported
99.9%
Platform uptime
<50ms
Average latency
10k+
Builders onboard
Ready to build the future of voice?
Join thousands of builders shipping voice agents on vapi.click. Start free, scale when you're ready.