Post.fm went through Y Combinator in the Summer 2010 batch and describes itself as: New email inbox. As of November 10, 2026, Y Combinator's directory lists it as Inactive (Y Combinator directory entry, January 17, 2012).
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Key facts
- · Batch: Summer 2010 · Post.fm in the Y Combinator directory
- · Industry: B2B · Post.fm in the Y Combinator directory
- · Based: London, England, United Kingdom; Remote · Post.fm in the Y Combinator directory
- · Status: Inactive, as listed by Y Combinator · Post.fm in the Y Combinator directory
Post.fm went through Y Combinator in the Summer 2010 batch, describing itself as New email inbox. 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 2010
- What they did
- New email inbox.
- Industry
- B2B
- Based
- London, England, United Kingdom; Remote
- Status
- Inactive, as listed by Y Combinator
Its batch
Summer 2010 had 36 companies in YC's listing: 6 Active, 16 Acquired, 2 Public and 12 Inactive, so Post.fm is one of 12 companies from that batch listed as Inactive (33%). 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: Post.fm in the Y Combinator directory. Measured 2026-11-10 from Y Combinator's company directory.
YC Summer 2010All 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
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What the Full Report on Post.fm covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
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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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