Ossus (YC W26) — Intelligence for cultural institutions
We build intelligence for cultural institutions. Our first commercial product is for the literature industry with a focus on school and public libraries.
Ossus is a Y Combinator company in the Winter 2026 batch. Its directory entry describes it as: Intelligence for cultural institutions. The founders listed are Jonathan Görtz (Founder/CEO), Carl-Hugo Jacobsson (Founder), Kaan Sirin (Founder/CTO) (Y Combinator directory entry, January 25, 2026).
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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.
Checked away from the directory entry. What is below does not come from the company's Y Combinator page.
Ossus is the intelligence layer for libraries. One system to catalog, circulate, and understand a whole collection.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Jonathan Görtz
Founder/CEO
A universe is the only challenge worthy of mankind.
Carl-Hugo Jacobsson
Founder
I love growth
Kaan Sirin
Founder/CTO
chief librarian
Founders, titles and bios as the company published them. Photographs are our own copies of the ones on that record, so they do not break when the original link expires.
One of 338 companies held here in B2B › Infrastructure.
No investor is drawn from a Form D — the form states how many invested and never who. The one investor on this graph is named because a batch has exactly one.
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Example from a real report (our sample on Target): “In March 2026, Target announced a planned incremental $1 billion operating investment” Source: Target Corporation (press release)
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Warning Bells
Sources
8 cited sources found
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