All 46 companies in Y Combinator's Winter 2013 batch, with team size, growth, open roles and funding.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
| Company | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|
The leader in automated data movement | 1,934 | +5% | +13% | 44 | $853M | Debt$125M, May 2023 |
The easiest way to create a beautiful, mobile optimized website. | 468 | 0% | −1% | 1 | $17.5M | Series A$10M, Aug 2018 |
RADAR is building technology to completely transform the in-store… | 241 | +10% | +23% | 4 | $310M | Series B$170M, May 2026 |
HR for small businesses: onboarding, payroll and benefits. | 214 | −5% | −9% | 0 | $584M | Undisclosed round$500M, Oct 2021 |
The platform for building and operating time series applications. | 169 | −8% | 9 | $201M | Debt$30M, Feb 2023 | |
We're Robinhood for pre-IPO startups. Everyone can invest $100. | 139 | +4% | +13% | YC | $25.3M | Undisclosed round$3.5M, Nov 2024 |
Empowering restaurants and small food makers to ship nationwide. | 115 | +1% | −3% | YC | $133M | Series C$100M, May 2021 |
Captures user interactions with no code to generate analytics. | 98 | −5% | −15% | 0 | $218M | Series D$110M, Dec 2021 |
Papyrus → Parchment → Paper → Padlet | 81 | +1% | +8% | 2 | $12.7M | Series A$11M, Apr 2019 |
Kalibrr connects SEAsian talent to your local & global jobs. | 72 | +3% | 0 | $9.4M | Convertible note$5.5M, Mar 2019 | |
BuildZoom is a better way to remodel. We connect homeowners to the… | 61 | +2% | −21% | 0 | $23.7M | Series B$9M, Dec 2021 |
We sell health insurance to small businesses 100% online. | 45 | −2% | −4% | 2 | $8.4M | Private equity$5.9M, Jan 2023 |
Airware provides end-to-end solutions that enable enterprises to… | 43 | +2% | 0 | $120M | Undisclosed round$8.5M, Apr 2018 | |
Watsi is the first global crowdfunding platform for medical… | 35 | +6% | +6% | 0 | $1.2M | Grant$1.2M, Mar 2013 |
Analytics for impatient people. | 28 | +12% | +22% | 0 | $46.3M | Series C$18M, Dec 2017 |
Etleap is an ETL solution for creating perfect data pipelines. | 24 | +20% | YC | $1.6M | Seed$1.5M, Apr 2018 | |
CrowdMed harnesses the wisdom of crowds to solve difficult medical… | 8 | 0% | 0% | 0 | $3.5M | Equity crowdfunding$403K, Apr 2017 |
Changing divorce for good by making it a way less horrible experience… | 7 | 0% | 0% | 0 | $6.5M | Undisclosed round$3.1M, Jul 2016 |
Online circuit simulator and electronic schematic editor. | 5 | 0 | SeedMar 2013 | |||
Medisas builds workflow & collaboration software for hospitals. | 5 | 0% | 0% | 0 | $12.6M | Series A$10.6M, Dec 2016 |
Lawdingo provides virtual paralegal services to law firms. | 4 | 0 | $810K | Seed$690K, Sep 2014 | ||
Online Auctions for Authentic (Women's) Designer Goods | 3 | 0 | $120K | YC investment$120K, Mar 2013 | ||
crowdfunding platform for science | 3 | 0 | $1.2M | Undisclosed round$1.2M, Dec 2014 | ||
Simple invoicing | 1 | 0 | $700K | Seed$700K, Jan 2013 | ||
VaycayHero is a marketplace of professionally managed vacation… | 1 | 0 | $4.3M | Seed$837K, May 2016 | ||
Data and AI platform for Ecommerce & Cross-Border Logistics | 1 | 0 | $2.1M | Undisclosed round$1.6M, Nov 2015 | ||
Ultra-short feedback surveys on tablets mounted in businesses. Higher… | 1 | 0 | $120K | YC investment$120K, Mar 2013 | ||
StyleUp brings effortless joy to getting dressed with daily,… | ||||||
Collaborative Screen Sharing, you each get your own mouse, and… | 0 | |||||
The easiest way to prototype web applications. | ||||||
Wearable computing hardware: biosignal gesture recognition | ||||||
Kickstarter for physical products. Shop exclusive product launches. | ||||||
Educational assessments made easy. Eliminating paper-based exams in… | ||||||
Big Data Analytics | ||||||
The App Store for Server Software | ||||||
Fastest, easiest, and most affordable way for small business owners… | ||||||
A universal urban transit app. Given all transportation options… | ||||||
Simple password & identity management for teams. Acquired by LogMeIn… | ||||||
Music, Metrics... Meritocracy.
(Upload Music, Connect your Social… | 0 | $97K | YC investment$97K, Jan 2013 | |||
Stop missing deliveries. Ship to Swapbox and pick up at our kiosks. | ||||||
Radiology in the cloud. X-rays, CAT scans, MRI's, and… | 0 | $120K | Seed$120K, Oct 2014 | |||
FlightCar is the Airbnb of Car Rentals at Airports.
We allow people… | ||||||
A mobile wallet that allows you to pay everywhere credit cards are… | ||||||
Logiblock engineers electronics and development tools to dramatically… | ||||||
IMPORTANT: The original YC founders are no longer involved with this… | ||||||
Predicting workplace performance through neuroscience | 0 | $120K | Seed$120K, Apr 2014 |
Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.
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.
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.
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.
# 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
46 companies were in Y Combinator's Winter 2013 batch (W13); 17 are active.
6 companies posted roles in the last 60 days, led by Fivetran (44 roles), InfluxData (9 roles) and RADAR (4 roles). 7 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): RADAR (+10%), Watsi (+6%) and Fivetran (+5%).
Largest latest rounds in the last 12 months, after their YC batch: RADAR ($170M).