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14,448 startups · 29 programs

Ossus

Active · Intelligence for cultural institutions

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 7
  • went through YCProgram · this site+4
  • team of 3Team size · YC's directory+3.1

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

Same space

AINeurofinShared: institutionAntler 2025IndiaStartup →AIMinervaShared: institution, nativeYC X25San FranciscoStartup →OtherAcquiredZenterShared: public libraryYC W07San FranciscoStartup →OtherAcquiredRoutableShared: tedious taskYC S17San FranciscoStartup →AIAcquiredTruvaShared: tedious task, focusYC S22San FranciscoStartup →
Companies next to Ossus
Company
NeurofinShared: institutionAntler 2025Not statedAI
MinervaShared: institution, nativeYC X25ActiveAI
ZenterShared: public libraryYC W07AcquiredOther
RoutableShared: tedious taskYC S17AcquiredOther
TruvaShared: tedious task, focusYC S22AcquiredAI

Also from W26 in AI

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

Founders

  • Jonathan GörtzFounder/CEO
  • Carl-Hugo JacobssonFounder
  • Kaan SirinFounder/CTO

About Ossus

We build intelligence for cultural institutions. Our first commercial product is for the literature industry with a focus on school and public libraries. It is a AI-native OS for libraries, that helps librarians save time on tedious tasks and lets them focus on their patrons.

YC batch
W26 · Winter 2026
Status, per YC
Active
Category
AI, Developer tools
Team size
3
Location
San Francisco, CA, USA
Founded
2026
Checked
7h ago

YC tags: Culture, AI

Ossus in W26: 199 companies, 81% AI

LinkedIn

Ossus: questions

Which YC batch was Ossus in?

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

Is Ossus still active?

Y Combinator lists Ossus as active.

Who founded Ossus?

Ossus's founders, as listed on its YC page: Jonathan Görtz (Founder/CEO), Carl-Hugo Jacobsson (Founder), Kaan Sirin (Founder/CTO).

Where is Ossus based?

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