Atrium went through Y Combinator in the Winter 2018 batch and describes itself as: Modern law firm for startups powered by proprietary technology. As of November 10, 2026, Y Combinator's directory lists it as Inactive (Y Combinator directory entry, November 10, 2017).
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Key facts
- · Batch: Winter 2018 · Atrium in the Y Combinator directory
- · Industry: B2B · Atrium in the Y Combinator directory
- · Team size: 180 · Atrium in the Y Combinator directory
- · Based: San Francisco, CA, USA · Atrium in the Y Combinator directory
- · Status: Inactive, as listed by Y Combinator · Atrium in the Y Combinator directory
Atrium went through Y Combinator in the Winter 2018 batch, describing itself as Modern law firm for startups powered by proprietary technology. Y Combinator's company directory lists it as Inactive. The directory does not say why a company stopped, and this page does not guess.
- Batch
- Winter 2018
- What they did
- Modern law firm for startups powered by proprietary technology
- Industry
- B2B
- Team size
- 180
- Based
- San Francisco, CA, USA
- Status
- Inactive, as listed by Y Combinator
Its batch
Winter 2018 had 146 companies in YC's listing: 77 Active, 29 Acquired, 1 Public and 39 Inactive, so Atrium is one of 39 companies from that batch listed as Inactive (27%). Across YC batches at least two years old, 23% of companies are listed Inactive.
Statuses are Y Combinator's own listing in its public company directory, read on the date shown. YC's directory can drop companies altogether, so the Inactive counts here are a floor, not a full count of companies that stopped. Acquired and Public are as YC lists them; neither says anything about the price or the outcome for founders.
The record: Atrium in the Y Combinator directory. Measured 2026-11-10 from Y Combinator's company directory.
YC Winter 2018All shut-down YC companiesYC outcomes
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Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
A Full Report on Atrium: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on Atrium covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
1 cited source found
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