Y Combinator Summer 2009 batch: all 26 companies.
YC's public directory lists 26 companies in the Y Combinator Summer 2009 batch: 7 active, 7 acquired, 12 inactive and 0 public, by YC's own labels. The most common industries are Consumer (12), B2B (9) and Fintech (2).
Companies in the YC Summer 2009 batch
26 companies in this view
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- Industry
- B2B · Marketing
- Location, as listed
- Not listed
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USATeam size 30
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Transportation Services
- Location, as listed
- San Francisco, CA, USA; Burlingame, CA, USATeam size 11
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Home and Personal
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Active
- Industry
- B2B · Marketing
- Location, as listed
- Minneapolis, MN, USATeam size 11
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Travel, Leisure and Tourism
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Content
- Location, as listed
- San Francisco, CA, USA; Palo Alto, CA, USATeam size 2
- Status, as YC lists it
- Acquired
- Industry
- Consumer · Content
- Location, as listed
- San Francisco, CA, USA; Mountain View, CA, USATeam size 11
- Status, as YC lists it
- Inactive
- Industry
- B2B · Retail
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Job and Career Services
- Location, as listed
- San Francisco, CA, USATeam size 11
- Status, as YC lists it
- Inactive
- Industry
- Education
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Active
- Industry
- Consumer · Home and Personal
- Location, as listed
- San Francisco, CA, USA; Campbell, CA, USA; RemoteTeam size 6
- Status, as YC lists it
- Active
- Industry
- Consumer · Consumer Electronics
- Location, as listed
- San Francisco, CA, USA; Palo Alto, CA, USATeam size 11
- Status, as YC lists it
- Acquired
- Industry
- B2B · Analytics
- Location, as listed
- San Francisco, CA, USATeam size 410
- Status, as YC lists it
- ActiveYC top company
- Industry
- B2B · Engineering, Product and Design
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- B2B · Retail
- Location, as listed
- San Francisco, CA, USA; RemoteTeam size 15
- Status, as YC lists it
- Active
- Industry
- Consumer · Social
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Real Estate and Construction · Housing and Real Estate
- Location, as listed
- New York City, NY, USA; New York, NY, USATeam size 9
- Status, as YC lists it
- Active
- Industry
- B2B · Infrastructure
- Location, as listed
- San Francisco, CA, USATeam size 11
- Status, as YC lists it
- Acquired
- Industry
- B2B · Human Resources
- Location, as listed
- San Francisco, CA, USA
- Status, as YC lists it
- Inactive
- Industry
- B2B · Engineering, Product and Design
- Location, as listed
- Not listed
- Status, as YC lists it
- Inactive
- Industry
- Fintech
- Location, as listed
- San Francisco, CA, USATeam size 7,000
- Status, as YC lists it
- ActiveYC top company
- Industry
- Real Estate and Construction
- Location, as listed
- London, England, United Kingdom; RemoteTeam size 3
- Status, as YC lists it
- Inactive
- Industry
- Consumer · Consumer Electronics
- Location, as listed
- San Francisco, CA, USATeam size 2
- Status, as YC lists it
- Inactive
- Industry
- Fintech · Payments
- Location, as listed
- San Francisco, CA, USA; Redwood City, CA, USATeam size 400
- Status, as YC lists it
- AcquiredYC top company
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 Summer 2009 batch
The directory lists 26 Summer 2009 companies, most often first listed in San Francisco (21), London (1) and Minneapolis (1). YC flags 3 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, Summer 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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