Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Vapi

Active · Voice AI for developers.

WebsiteYC profile

Why it ranks

How the rank works
18signal of 100 · rising 4
  • team of 50Team size · YC's directory+8.9
  • went through YCProgram · this site+4
  • 2 programsMore than one program · this site+3
  • hiringHiring · Titles (titles.fru.dev), YC+2

A sum of public facts, not a judgement and not investment advice.

Competitors

OtherSelaShared: voiceStartup →OtherOmiliaShared: voiceStartup →OtherFish AudioShared: voiceStartup →
Companies closest to Vapi
Company
Selanot in a program hereShared: voiceElsewhereOther
Omilianot in a program hereShared: voiceElsewhereOther
Fish Audionot in a program hereShared: voiceElsewhereOther

Adjacent

AIFreyaShared: voiceYC S25IstanbulStartup →AIFeatherShared: voiceYC S22SeattleStartup →AIAcquiredVocodeShared: voiceYC W23San FranciscoStartup →AIRevoxShared: voiceSeedcamp 2025Startup →AIHey TeloShared: voiceYC W25BYStartup →
Companies next to Vapi
Company
FreyaShared: voiceYC S25ActiveAI
FeatherShared: voiceYC S22ActiveAI
VocodeShared: voiceYC W23AcquiredAI, Devtools
RevoxShared: voiceSeedcamp 2025Not statedAI
Hey TeloShared: voiceYC W25ActiveAI

Also from W21 in AI

All of W21
AIAbacumThe AI-native FP&A platform that helps Finance teams drive business…YC W21New York CityStartup →AIAlineaAutomated investing for the next generation 💸YC W21New York CityStartup →AIAnimaThe next generation care enablement platformYC W21LondonStartup →AIarnataAI workers for the logistics industry.YC W21San FranciscoStartup →AIAtomic IndustriesSoftware orchestrated mass production of plasticsYC W21ClevelandStartup →AIauthzedAuthorization Infrastructure securing AI at OpenAI, Zoom, & moreYC W21New York CityStartup →
Company
AbacumThe AI-native FP&A platform that helps Finance teams drive business…team of 125hiringActiveAI
AlineaAutomated investing for the next generation 💸team of 12hiringActiveAI
AnimaThe next generation care enablement platformteam of 20hiringActiveAI
arnataAI workers for the logistics industry.team of 15hiringActiveAI
Atomic IndustriesSoftware orchestrated mass production of plasticsteam of 60hiringActiveAI
authzedAuthorization Infrastructure securing AI at OpenAI, Zoom, & moreteam of 31hiringActiveAI, Data, Devtools

Programs

Programs Vapi went through
ProgramCohortSource
Y CombinatorW21YC Page
AI GrantBatch 4AI Grant Page

About Vapi

YC batch
W21 · Winter 2021
Status, per YC
Active
Category
AI, Developer tools
Team size
50
Location
San Francisco, CA, USA
Checked
6h ago

YC tags: AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

Vapi in W21: 336 companies, 30% AI

Company profileawards

Vapi: questions

Which YC batch was Vapi in?

Vapi was in Y Combinator's Winter 2021 batch (W21).

Which accelerators did Vapi go through?

Vapi is listed by Y Combinator (W21), AI Grant (Grant Batch 4).

Is Vapi still active?

Y Combinator lists Vapi as active.

Where is Vapi based?

Vapi lists San Francisco, CA, USA as its location on YC's directory.