Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Index

Inactive · Mapping the world's professional relationships.

YC profile

Why it ranks

How the rank works
2signal of 100 · rising 0
  • team of 5Team size · YC's directory+4
  • went through YCProgram · this site+4

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

Same space

AIIntrodex.ioShared: warm introductionAntler 2023SingaporeStartup →AICedarShared: professional relationshipspeedrun SR006San FranciscoStartup →AISkinseoul LabShared: public information500 Global 2024South KoreaStartup →OtherAcquiredPartneredShared: introduction, salesYC W21New York CityStartup →AICentralizeShared: relationship, know, salesYC W24San FranciscoStartup →
Companies next to Index
Company
Introdex.ioShared: warm introductionAntler 2023Not statedAI
CedarShared: professional relationshipspeedrun SR006Not statedAI
Skinseoul LabShared: public information500 Global 2024Not statedAI
PartneredShared: introduction, salesYC W21AcquiredOther
CentralizeShared: relationship, know, salesYC W24ActiveAI

Also from W16

All of W16
AIInactiveAlgorizAlgoriz is an AI based algorithmic trading platform that enables you…YC W16New York CityStartup →AIAcquiredCaperPlug-and-play cashier-less retail powered by computer vision and AIYC W16Startup →Developer toolsCastleBlock bots & bad behaviorYC W16San FranciscoStartup →Developer toolsChatfuelPlatform to easily create chatbots to engage with audiences on…YC W16San FranciscoStartup →AIDailyConversational Voice and Multimodal AI built with Open SourceYC W16San FranciscoStartup →AIDeepgramBuilding foundational AI for speech transcription and understanding.YC W16San FranciscoStartup →
Company
AlgorizAlgoriz is an AI based algorithmic trading platform that enables you…team of 4InactiveAI
CaperPlug-and-play cashier-less retail powered by computer vision and AIteam of 15YC top companyAcquiredAI
CastleBlock bots & bad behaviorteam of 20hiringActiveDevtools
ChatfuelPlatform to easily create chatbots to engage with audiences on…team of 532 programsActiveDevtools
DailyConversational Voice and Multimodal AI built with Open Sourceteam of 126ActiveAI, Devtools
DeepgramBuilding foundational AI for speech transcription and understanding.team of 115released Improved modelsActiveAI, Devtools

About Index

Get warm introductions from your colleagues Index combines public information on people with private information on relationships to tell you who knows who and how well.

YC batch
W16 · Winter 2016
Status, per YC
Inactive
Category
Other
Team size
5
Location
San Francisco, CA, USA
Checked
6h ago

YC tags: Networks

Changes seen

WebsiteNov 2, 2026

Moved its website from index.io to none.

Source ↗
Website linkNov 2, 2026

Website link changed from http://www.index.io to none.

Source ↗

Index in W16: 122 companies, 18% AI

Index: questions

Which YC batch was Index in?

Index was in Y Combinator's Winter 2016 batch (W16).

Is Index still active?

Y Combinator lists Index as inactive.

Where is Index based?

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