Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

Forum

Active · The first exchange to trade on attention.

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 7
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5

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

Same space

OtherSwayShared: digital ageNeoStartup →OtherLiquidShared: tradeNeoStartup →OtherkitchShared: digital ageSeedcamp 2019Startup →OtherYellowBirdShared: demand riskPlug and PlayUnited StatesStartup →OtherInactiveInokyoShared: digital ageYC S18San FranciscoStartup →
Companies next to Forum
Company
SwayShared: digital ageNeo Not statedOther
LiquidShared: tradeNeo Not statedOther
kitchShared: digital ageSeedcamp 2019Not statedOther
YellowBirdShared: demand riskPlug and Play Not statedOther
InokyoShared: digital ageYC S18InactiveOther

Also from W26

All of W26
AI/dev/fast/dev/fast is the AI-native code forgeYC W26San FranciscoStartup →AI10x ScienceThe AI-native platform for next-generation protein characterization.YC W26San FranciscoStartup →AI21stUI building blocks for the agentic internetYC W26San FranciscoStartup →AIAemonThe Forward-Deployed AI Research EngineerYC W26San FranciscoStartup →AIAgentic FabriqThe control plane for AI agents.YC W26San FranciscoStartup →AIAlt-XBuilding the best venue for private markets exposure.YC W26Los AngelesStartup →
Company
/dev/fast/dev/fast is the AI-native code forgeteam of 4ActiveAI, Devtools
10x ScienceThe AI-native platform for next-generation protein characterization.team of 5hiringActiveAI
21stUI building blocks for the agentic internetteam of 3ActiveAI, Devtools
AemonThe Forward-Deployed AI Research Engineerteam of 3hiringActiveAI, Devtools
Agentic FabriqThe control plane for AI agents.team of 2ActiveAI
Alt-XBuilding the best venue for private markets exposure.team of 2ActiveAI, Data

About Forum

Forum is building the first exchange to trade on cultural attention. We create indices from search, social, and streaming data to measure what the world cares about, enabling users to go long or short on changes in relevance. Attention is the primary driver of business success in the digital age, but it has never been directly tradable. Forum introduces attention as a new asset class for managing cultural and demand risk.

YC batch
W26 · Winter 2026
Status, per YC
Active
Category
Other
Team size
2
Location
New York City, NY, USA
Checked
7h ago

Forum in W26: 199 companies, 81% AI

Forum: questions

Which YC batch was Forum in?

Forum was in Y Combinator's Winter 2026 batch (W26).

Is Forum still active?

Y Combinator lists Forum as active.

Where is Forum based?

Forum lists New York City, NY, USA as its location on YC's directory.