Nuntius went through Y Combinator in the Summer 2025 batch and describes itself as: Making Models Follow Rules. As of November 10, 2026, Y Combinator's directory lists it as Inactive (Y Combinator directory entry, August 8, 2025).
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Key facts
- · Batch: Summer 2025 · Nuntius in the Y Combinator directory
- · Industry: B2B · Nuntius in the Y Combinator directory
- · Team size: 2 · Nuntius in the Y Combinator directory
- · Based: San Francisco, CA, USA · Nuntius in the Y Combinator directory
- · Status: Inactive, as listed by Y Combinator · Nuntius in the Y Combinator directory
Nuntius went through Y Combinator in the Summer 2025 batch, describing itself as Making Models Follow Rules. 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
- Summer 2025
- What they did
- Making Models Follow Rules.
- Industry
- B2B
- Team size
- 2
- Based
- San Francisco, CA, USA
- Status
- Inactive, as listed by Y Combinator
Its batch
Summer 2025 had 167 companies in YC's listing: 160 Active, 3 Acquired, 0 Public and 4 Inactive, so Nuntius is one of 4 companies from that batch listed as Inactive (2%). 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: Nuntius in the Y Combinator directory. Measured 2026-11-10 from Y Combinator's company directory.
YC Summer 2025All shut-down YC companiesYC outcomes
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The Short Answer
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Warning Bells
Sources
1 cited source found
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