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YC W11 companies (Winter 2011)

All 45 companies in Y Combinator's Winter 2011 batch, with team size, growth, open roles and funding.

Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.

Hiring the mostlast 60 days
25 roles
GOAT GroupW11
  1. 2SingleStore14
  2. 3Zerocater5
See all 5
Fastest growingteam, 6 months
+10%
TremendousW11
  1. 2SingleStore+3%
  2. 3Close+1%
See all 3
Shrinkingteam, 12 months
−27%
TalkableW11
  1. 2GOAT Group−6%
  2. 3Zerocater−5%
See all 3
Companies
45
Active
12
Hiring, last 60 days
5
Open roles, 60 days
48
People on these teams
2,779
Showing 45 of 45 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Platform for the greatest products from the past, present and future.
926−5%−6%25$493MUndisclosed round$195M, Apr 2022
The cloud-native, operational database built for speed and scale.
565+3%+2%14$464MSeries F$30M, Oct 2022
How businesses send money to people at scale. Fast, free, global.
221+10%+33%2SeedMar 2011
CRM and sales automation suite
216+1%+6%2SeedJan 2013
Email API service.
188−2%−3%0$51.1MPrivate equity$50M, Feb 2017
Zerocater is revolutionizing how companies feed their employees
161−1%−5%5$37.9MSeries C$15M, Feb 2023
Customer loyalty and payments platform for small businesses.
126 −1%0$144MSeries D$52.2M, Oct 2020
The essential platform for modern medical practices and patients.
122−6%−10%0$60.7MUndisclosed round$12M, Jun 2021
Turning PhDs & engineers into data scientists & data engineers
79−6%−5%0$11MSeries B$11M, Feb 2018
Pay what you want for awesome games and other content while giving to…
63+3%+5%0$4.5MUndisclosed round$4.5M, Apr 2011
Online store referrals.
44−14%−27%0$4.2MUndisclosed round$3M, Jun 2017
eSignature software for small and mid-market businesses.
140%0%0$16MSeries B$16M, Jun 2017
The future of hardware design. A marketplace for hardware engineering…
11−8%−8%0$2.4MSeed$2.4M, Jul 2013
Record your family stories and print them in beautiful keepsake books.
100%+11%0$150KSeed$150K, Sep 2014
Watch that helps you get shit done and limit the mayhem of…
7−12%−12%0
All-in-one apartment Marketing Platform for brokerages and landlords.
50%0%0$150KYC investment$150K, Mar 2011
Ebook publisher.
4  0$1.2MSeed$1.2M, Oct 2011
Tumult is building the next generation of apps for web design. Our…
3  0SeedMar 2011
Order ahead for pickup
3  0$10.5MSeries A$8M, Dec 2013
Google AdWords for music. Allowing bands and labels to bid for…
2  0$1.7MAngel$1.7M, Jan 2012
Custom-made artwork from artists e-commerce marketplace.
2  0SeedMar 2011
Custora is a predictive analytics platform for e-commerce marketing…
2  0$21.2MSeries B$13.8M, Sep 2018
IMDB of conferences.
2  0$1.4MSeed$1.4M, Sep 2011
Facebook stores.
1  0SeedApr 2011
iOS porting
1  0$11.4MSeed$2.5M, Dec 2014
Mobile games company
1  YC
User retention as a service. Drip email
  0$700KAngel$700K, Feb 2013
Fashion shopping email list.
  
Google Voice for business.
  
Pivoted to TenXList, a professional network of top college engineers.
  
New projects
  0$400KYC investment$400K, Jan 2011
.NET Cloud Platform as a Service
  0SeedMar 2011
  
High speed peer to peer data transport technology for consumers…
  
Real-time analytics (acq by TWTR, 2012)
  
SaaS to increase speed and quality of clinical trials.
  0
Hosted IRC and so much more.
  
Third generation of web apps.
  0
Payments for Marketplaces
  
Online tutoring marketplace.
  
Trust funds.
  0$1.1MSeed$1M, Dec 2013
Siasto is a collaboration tool designed for SMBs who use Google Apps,…
  
Consumer to business messaging.
  
Venue marketplace.
  
Sell your stuff.
  

How this works

1. The roster

Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.

2. The numbers

Each company is matched to Crustdata by its website. Crustdata adds team size and its change over 6 and 12 months, open roles from job postings, reported funding, and founders' past employers.

3. The lists

Hiring the most counts distinct roles posted in the last 60 days. Growth needs 10+ people today, shrinking 20+ a year ago, so tiny teams do not top the lists. Rebuilt every week.

Built with Crustdata. Get your own API key and build your own.

The numbers on this page come from three Crustdata API calls. Crustdata tags 5,000+ companies with Y Combinator as an investor; swap the filter for any investor, industry or headcount range and track your own list, with founders' work emails one call away.

  • Company search for team size, growth and funding
  • Job search with a count by company, for who is hiring and for what
  • A watch that re-runs the search weekly and sends only what changed
# 1. every company with Y Combinator as an investor
curl https://api.crustdata.com/company/search \
  -H "authorization: Bearer $CRUSTDATA_API_KEY" \
  -H "x-api-version: 2025-11-01" \
  -d '{
    "filters": { "field": "funding.investors",
                 "type": "in", "value": ["Y Combinator"] },
    "fields": ["basic_info.name",
      "headcount.total", "headcount.growth_percent",
      "funding.total_investment_usd"],
    "limit": 100
  }'

# 2. open listings per company, last 60 days (limit 0 = counts only)
curl https://api.crustdata.com/job/search \
  -H "authorization: Bearer $CRUSTDATA_API_KEY" \
  -H "x-api-version: 2025-11-01" \
  -d '{
  "filters": { "op": "and", "conditions": [
    { "field": "company.basic_info.company_id",
      "type": "in", "value": [...] },
    { "field": "metadata.date_added",
      "type": "=>", "value": "2026-08-24" } ]},
  "limit": 0,
  "aggregations": [{ "type": "group_by",
    "field": "company.basic_info.company_id", "agg": "count" }]
}'

# 3. the same company filter as a weekly watch: POST /watch/company/search

Questions about YC W11 companies

How many YC W11 companies are there?

45 companies were in Y Combinator's Winter 2011 batch (W11); 12 are active.

Which YC W11 companies are hiring?

5 companies posted roles in the last 60 days, led by GOAT Group (25 roles), SingleStore (14 roles) and Zerocater (5 roles). 2 mark themselves as hiring on YC's directory.

Which YC W11 companies are growing fastest?

By team growth over 6 months (10+ people): Tremendous (+10%), SingleStore (+3%) and Close (+1%).

Which YC W11 companies raised the most?

No reported rounds after their YC batch in the last 12 months.

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