Sidenote went through Y Combinator in the Summer 2023 batch, describing itself as Meeting follow-up, automated. 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 2023
- What they did
- Meeting follow-up, automated
- Industry
- B2B
- Team size
- 3
- Based
- San Francisco, CA, USA; Stanford, CA, USA
- Status
- Inactive, as listed by Y Combinator
Its batch
Summer 2023 had 220 companies in YC's listing: 180 Active, 18 Acquired, 0 Public and 22 Inactive, so Sidenote is one of 22 companies from that batch listed as Inactive (10%). 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: Sidenote in the Y Combinator directory. Measured 2026-09-26 from Y Combinator's company directory.
YC Summer 2023All shut-down YC companiesYC outcomes
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