# Vapi

> AI voice agents for developers and businesses

Vapi is a developer platform for building, testing, and deploying AI voice agents at scale. Features ultra-low latency (<500ms), 100+ voice options, function calling, background noise cancellation, and call analytics. Used for customer support automation, appointment scheduling, and intake flows.

## Quick facts

- Categories: AI Agents, Developer Tools, Voice
- Pricing: Freemium (free plan + paid tiers)
- Free plan: Yes
- Official site: https://vapi.ai
- Last checked: 2026-10-22

## Key features

- Voice AI infrastructure platform
- Phone AI agent building
- Low-latency voice synthesis
- Call routing and management
- Custom voice personas
- Developer API

## Use cases

- Building AI phone call agents
- Customer service voice automation
- Appointment booking via phone AI
- Voice AI application development

## Links

- Nextool.ai page: https://nextool.ai/tools/vapi/
- Alternatives: https://nextool.ai/alternatives/vapi/

Source: Nextool.ai (https://nextool.ai/tools/vapi/). Pricing and features change; confirm on the provider's site before relying on them.