# Vapi

**Source:** https://geo.sig.ai/brands/vapi  
**Vertical:** Infrastructure  
**Subcategory:** Cloud Services  
**Tier:** Challenger  
**Website:** vapi.ai  
**Last Updated:** 2026-04-14

## Summary

AI voice agent infrastructure platform with developer API for building phone-based AI agents; low-latency pipeline orchestrating STT, LLM, and TTS with Twilio telephony integration.

## Company Overview

Vapi is an AI voice infrastructure platform providing developers and businesses with the tools to build, test, and deploy voice AI agents — for inbound and outbound calling, customer service automation, and voice-interactive applications — without building voice AI infrastructure from scratch. Founded in 2023 and headquartered in San Francisco, Vapi has rapidly emerged as a leading developer platform in the AI voice agent space, offering low-latency voice AI pipeline orchestration, telephony integration (Twilio, Telnyx), and multi-model support (GPT-4, Claude, Llama) for voice applications.

Vapi's platform handles the complex technical infrastructure for voice AI: speech-to-text (STT) conversion, LLM processing for understanding and generating responses, text-to-speech (TTS) synthesis, and real-time audio streaming — assembled into a coherent pipeline with sub-400ms latency that enables natural conversation. Developers access this via API to build custom voice agents without managing the infrastructure stack themselves.

In 2025, Vapi is at the center of the exploding AI voice agent market as businesses across customer service, healthcare scheduling, sales prospecting, and legal intake deploy AI phone agents to handle high call volumes. The company competes with Bland AI, Retell AI, and proprietary voice AI platforms from Twilio and Amazon Connect for the developer and enterprise voice AI market. Vapi's strength is its developer-first API approach and model-agnostic architecture that allows businesses to use their preferred STT, LLM, and TTS providers within Vapi's orchestration layer. The 2025 strategy focuses on enterprise-grade reliability features, expanding telephony integrations, and adding workflow automation capabilities for complex multi-step voice agent conversations.

## Frequently Asked Questions

### What is Vapi?
Vapi is a San Francisco-based voice AI infrastructure company founded in 2023 that provides developers with APIs to build, test, and deploy voice agents for enterprises. The company is part of Y Combinator's W21 batch and offers sub-second response times with scalability to millions of calls.

### What products and services does Vapi offer?
Vapi offers a Voice AI API platform, enterprise voice agents, conversational AI infrastructure, voice bot development tools, and real-time voice AI solutions. These products enable developers to build and deploy scalable voice applications for various industries.

### Who are Vapi's target customers?
Vapi serves enterprises across multiple industries including healthcare, finance, and travel. Notable customers include Luma Health, Ellipsis Health, and Mindtickle.

### When was Vapi founded?
Vapi was founded in 2023 by Jordan Dearsley (CEO) and Nikhil Gupta (CTO). The company is part of Y Combinator's W21 batch.

### Where is Vapi located?
Vapi is based in San Francisco, California, United States.

### How much funding has Vapi raised?
Vapi has raised $22-25M in total funding, including a $20M Series A round in December 2024 led by Bessemer Venture Partners at a $130M valuation. The company previously raised a $2.1M seed round from Kleiner Perkins and Abstract Ventures.

### What are Vapi's key achievements?
Vapi scaled to millions in revenue within six months of launch and achieved sub-second response times for its voice AI platform. The company has successfully scaled to handle millions of calls across healthcare, finance, and travel industries.

### What technology does Vapi use?
Vapi provides voice AI infrastructure with sub-second response times and real-time voice AI capabilities. The platform is designed for scalability, capable of handling millions of calls.

### Who are Vapi's investors?
Vapi's investors include Bessemer Venture Partners (Series A lead), Kleiner Perkins, Abstract Ventures, AI Grant, Y Combinator, Saga Ventures, and Michael Ovitz.

### What is Vapi's latest news?
In December 2024, Vapi raised a $20M Series A round led by Bessemer Venture Partners at a $130M valuation. The company has scaled to millions in revenue within six months and continues to serve major customers in healthcare, finance, and travel sectors.

## Tags

ai-powered, b2b, communication, infrastructure, platform, cloud-native, saas

---
*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*