Y Combinator Winter 2009 batch: all 16 companies.
YC's public directory lists 16 companies in the Y Combinator Winter 2009 batch: 1 active, 5 acquired, 9 inactive and 1 public, by YC's own labels. The most common industries are Consumer (9), B2B (5) and Real Estate and Construction (2).
Companies in the YC Winter 2009 batch
16 companies in this view
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- Industry
- Consumer · Travel, Leisure and Tourism
- Location, as listed
- San Francisco, CA, USATeam size 6,132
- Status, as YC lists it
- PublicYC top company
- Industry
- B2B · Infrastructure
- Location, as listed
- San Francisco, CA, USATeam size 11
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Content
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Food and Beverage
- Location, as listed
- San Francisco, CA, USATeam size 11
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Gaming
- Location, as listed
- San Francisco, CA, USATeam size 11
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USA
- Status, as YC lists it
- Inactive
- Industry
- B2B · Marketing
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USA; Mountain View, CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USA; Mountain View, CA, USA
- Status, as YC lists it
- Inactive
- Industry
- B2B · Productivity
- Location, as listed
- CA, USATeam size 1
- Status, as YC lists it
- Acquired
- Industry
- B2B · Productivity
- Location, as listed
- Not listedTeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Real Estate and Construction · Housing and Real Estate
- Location, as listed
- Not listed
- Status, as YC lists it
- Inactive
- Industry
- B2B · Marketing
- Location, as listed
- Atlanta, GA, USATeam size 19
- Status, as YC lists it
- Active
- Industry
- Consumer · Gaming
- Location, as listed
- CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Real Estate and Construction · Housing and Real Estate
- Location, as listed
- Princeton, NJ, USA; Remote
- Status, as YC lists it
- Inactive
How to use this list
- Filter by industry, listed location or status, or search for a company, a city or one of YC's tags.
- Each name opens the company's YC profile. The website link goes to the company's own site; we show it only for companies YC lists as active or public, because the domains of closed and acquired companies often lapse or change hands.
- Status is YC's label, not our assessment. Active does not mean funded, growing or looking for suppliers.
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About the Winter 2009 batch
The directory lists 16 Winter 2009 companies, most often first listed in San Francisco (10), CA (2) and Princeton (1). YC flags 1 of them as top companies.
About this data
Each record comes from YC's public startup directory, through the open-source yc-oss mirror of it, pulled on September 13, 2026. We show YC's own industry, location and status labels and none of YC's company descriptions. The directory lists launched companies YC shows publicly, so a company that has left it will not appear here.
If a record is wrong, use Suggest a correction on its row and include a source. We check corrections against YC's directory and the company's own site.
Sources
Checked September 13, 2026. YC updates its directory, so counts and labels change. Mining Wells is not affiliated with Y Combinator.
- Y Combinator: Startup directory, Winter 2009 batch: the companies, their status, industry and listed locations
- yc-oss: open-source mirror of YC's directory (pulled September 13, 2026): the snapshot these records come from
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