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YC W12 companies (Winter 2012)

All 66 companies in Y Combinator's Winter 2012 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
89 roles
GustoW12
  1. 2Amplitude35
  2. 3Matterport14
See all 7
Fastest growingteam, 6 months
+14%
CircuitHubW12
  1. 2Wave+9%
  2. 3HireArt+8%
See all 6
Shrinkingteam, 12 months
−8%
RidecellW12
Raised the mostlast 12 months
$28M
CircuitHubW12
Companies
66
Active
12
Hiring, last 60 days
7
Open roles, 60 days
159
People on these teams
14,105
Showing 50 of 66 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Mobile money app for Africa
5,813+9%+21%4$439MDebt$137M, Jun 2025
Turn physical objects and environments into 3D models in seconds.
527+2%0%14$418MPost-IPO equity$295M, Jul 2021
Mobile crowdfunding: The easiest way to collect, fundraise, and sell…
335+4%+20%0$67.1MSeries B$30M, Jul 2015
Gives businesses everything needed to hire & manage W2 contractors.
308+8%+22%8$33.5MSeries B$26.3M, Jul 2022
High Performance Computing Built for the Cloud
249+5%+7%1$273MGrant$115M, Jul 2026
The Muse is values-based job search & hiring for 7M+ monthly
2390%+3%0$39.7MUndisclosed round$8M, Sep 2022
On-demand smartphone repair in 3 countries and launching smart home…
183−1%−1%0SeedApr 2012
World's Leading Fleet Intelligence Platform
162−3%−8%YC$135MUndisclosed round$45M, Jun 2021
Instant, no fee international remittances.
123−2%−4%0
Rewards and recognition SaaS for HR leaders
76+6%+19%0$25.9MSeries A$11.5M, Sep 2016
On-Demand Electronics Manufacturing
66+14%+32%8$46.4MSeries A$28M, May 2026
A tool for pharmacists to find funding for patients who are unable to…
31+3%+7%0$150KSeed$150K, Oct 2016
LendUp is a socially responsible company on a mission to redefine…
22+22%+22%0$362MUndisclosed round$100M, Jun 2017
We are making a HIPAA-compliant, Groupme app for doctors to…
19−5%+6%0SeedMar 2012
Building Mission Critical Software Defined Radio products.
14−7%−12%0Non-equity supportJun 2020
Flutter combined computer vision technology with the built-in webcams…
10−29%−23%0$1.4MSeed$1.4M, Jun 2012
Make School is redesigning college for the 21st century. Students…
80%0%0$27.1MSeries B$2M, Jun 2020
Car Repairs, Reinvented:a. Mechanic comes to your home or work to fix…
7+17%+40%0$38.2MSeries B$10.2M, Oct 2018
Ark organizes the world's social information.
6−14%−14%0$4.5MSeed$4.2M, Apr 2012
We make it easy to search for office space.
4  0$17.4MSeries B$12M, Jan 2013
The open platform for the vacation rental industry.
4  0$7.5MSeries A$6.1M, Dec 2017
Smart search for the modern team.
4  0$22.2MSeries B$13M, Mar 2015
4  0SeedMar 2012
Simple Business SMS. SMBs to Large Enterprise.
3  0$10MUndisclosed round$5M, Jan 2015
Authy is a Two-Factor Authentication platform for developers
3  0$3.1MSeed$2.3M, Sep 2014
The BI bridge for unstructured data. We automatically bridge the gap…
2  0$2MSeed$2M, Mar 2013
We're creating every women's fantasy by combining the unwanted…
2  0$106KUndisclosed round$106K, Jul 2012
Deals, Coupons & Cash Back for your favorite stores.
2  0$13.6MUndisclosed round$7.2M, Feb 2016
A realtime wiki for getting things done.
1  0SeedJul 2013
Games For Education
1  0
Discover the photos and videos people are taking of your brand or…
1  0
One-click screen sharing with installation-free viewing on all devices
1  0SeedMar 2012
Palantir for sales people
1  0$1.5MSeed$1.5M, Jun 2013
We help companies turn their data into great stories.
1  0$1.7MSeed$1.5M, May 2012
Provides growing businesses with everything to take care of their team
4,797  89$746MSecondary$55M, Jul 2025
Digital Analytics Platform
1,076  35$341MSecondary$4.6M, Aug 2021
Mobile applications for the construction industry.
  
Really secure file sending for big files.
  
Customer communication for iOS and Android developers - an in-app…
  0SeedMar 2012
App that connects two phones and creates a private timeline to share…
  
Banking and Payment Platform APIs. Exited October 2014.
  
Fb ad optimization platform
  
BookSolid is the opentable for tour operators.
  
Help families stay in touch
  
Marft creates embeddable machine learning models for application…
  
Simple multiplayer game servers.
  
Deal search service
  
Shoptiques.com lets you shop the world's best local boutiques online.
  
Collaborate with an artist to commission original artwork you'll live…
  
Github for designers. We automatically keep track of revisions of…
  0SeedJan 2012

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 W12 companies

How many YC W12 companies are there?

66 companies were in Y Combinator's Winter 2012 batch (W12); 12 are active.

Which YC W12 companies are hiring?

7 companies posted roles in the last 60 days, led by Gusto (89 roles), Amplitude (35 roles) and Matterport (14 roles). 5 mark themselves as hiring on YC's directory.

Which YC W12 companies are growing fastest?

By team growth over 6 months (10+ people): CircuitHub (+14%), Wave (+9%) and HireArt (+8%).

Which YC W12 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: CircuitHub ($28M).

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