SID
Funding and backers
Team
11-50
employees, estimated range
Backers
1
Y Combinator
Momentum
0/100
no fresh signals
Last sign of life
1 mo ago
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Jun 2023
Went through Y Combinator
Tractionpublic signals, read monthly
Web presence
top 2%
of 133.2M domains by links, Common Crawl
Hacker News stories
1
best: 4 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
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
SID-1 Technical Report: Test-Time Compute for Retrieval
SID-1 is the first model trained end-to-end with RL solely for agentic retrieval. It reaches 0.84 recall on a diverse benchmark, compared to 0.78 for GPT-5.1 and 0.45 for traditional reranking pipelines. This report covers our infrastructure, reward desig
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
10-50 est. staff