Paper Instruments
LLM & Generative AI
Overview
Paper Instruments (formerly The LLM Data Company) trains frontier models and builds post-training infrastructure and agent-first software for knowledge work.
Funding and backers
Backers
2
Y Combinator, NextGen Venture Partners
Momentum
30/100
in the news, rising traction
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Oct 15
On the Hacker News front page Ultramarine 1 Flash · 382 points
Sep 2026
Website went live first capture in the Wayback Machine
Apr 2025
Went through Y Combinator
Tractionpublic signals, read monthly
Web presence
top 7%
of 133.2M domains by links, Common Crawl
Hacker News stories
5
best: 382 points
Backed byfrom the funds' portfolios and accelerator catalogs
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Connections
List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors
NextGen Venture PartnersVia a fund
Y CombinatorVia a fund
6310 portfolio companies
Click a company to open it. Dashed lines are likely connections. The second step of the network is part of the Pro plan.
Owner
Same company
Same group
Likely
News
Ultramarine 1 Flash: Scaling Non-Verifiable RL
Ultramarine 1 Flash: Scaling Non-Verifiable RL across Finance, Law, Consulting, and Operations
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Report
Ultramarine 1 Flash
Ultramarine 1 Flash is an open model for professional work. It makes the decks, models, and memos that people in finance, law, consulting, and operations put in front of clients, at a fraction of the cost of frontier models.
Read more
Report
Introducing Paper Office
Agent-first Python packages for editing Word documents, PowerPoint presentations, and Excel workbooks.
Read more
Report
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
San Francisco
United States
HQ