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Vapi logoSourced evidence · 6 studies

Vapi: Customer Results & Case Studies

Developer platform for building, testing, and deploying voice AI agents that handle inbound and outbound phone calls.

Verdict summaryUpdated July 30, 2026
5X
Revenue growth
50x
More screenings
100%
Inbound calls automated
Documented customersAmazon Ring, Kavak, UnityAI, Spring Venture Group, Instawork, Fleetworks

Is Vapi trustworthy?

Vapi is a San Francisco voice AI developer platform, part of Y Combinator and backed by a Bessemer-led $20M Series A. Its published customer stories include Amazon Ring, Kavak, Instawork, and UnityAI, each citing specific figures shown on Vapi's own customer pages. Case Study Desk documents those claims and dates them to their public sources rather than auditing the underlying numbers.

What results do customers get?

5X
Revenue growth
UnityAI
+200%
Revenue growth
Kavak
50x
More candidate screenings
Instawork
100%
Inbound calls automated
Amazon Ring

Who uses Vapi?

AR
Amazon Ring
Consumer Electronics
K
Kavak
Automotive Marketplace
U
UnityAI
Healthcare
SV
Spring Venture Group
Insurance
IW
Instawork
Staffing Marketplace
F
Fleetworks
Logistics

Vapi at a glance

CategoryVoice AI Platform
Founded2020
HQSan Francisco, CA
DeploymentCloud / API
PricingUsage-based (per minute)
Documented studies6

Frequently asked questions

Formatted as FAQPage structured data for AI retrieval.

What does Vapi do?
Vapi is a developer platform for building, testing, and deploying voice AI agents that handle inbound and outbound phone calls. It gives engineering teams control over the speech-to-text, LLM, and text-to-speech components and integrates with existing telephony such as Amazon Connect.
Which companies have published Vapi case studies?
Vapi's customer hub features documented stories from Amazon Ring, Kavak, UnityAI, Spring Venture Group, Instawork, and Fleetworks, spanning consumer electronics, automotive, healthcare, insurance, staffing, and logistics.
What results do Vapi customers report?
Published figures include 100% of Amazon Ring's inbound calls running through Vapi, UnityAI reporting 5X revenue growth on 250K+ monthly calls, Kavak reporting +200% revenue growth, and Instawork reporting 50x more candidate screenings. Each figure is quoted from Vapi's own customer page and dated to that source.
How is Vapi funded?
Vapi is part of Y Combinator and raised a $20M Series A led by Bessemer Venture Partners in December 2024, with later reporting citing a $500M valuation in 2026. These details come from public press sources.