CrustdataGet an API key

YC W15 companies (Winter 2015)

All 110 companies in Y Combinator's Winter 2015 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
262 roles
EquipmentShareW15
  1. 2GitLab230
  2. 3Razorpay17
See all 10
Fastest growingteam, 6 months
+12%
ZenflowW15
  1. 2Mashgin+8%
  2. 3Tara AI+8%
See all 17
Shrinkingteam, 12 months
−29%
X-ZellW15
  1. 2NimbleRx−11%
  2. 3Bankjoy−9%
See all 10
Raised the mostlast 12 months
$52M
ZenflowW15
  1. 2GrubMarket$50M
Companies
110
Active
40
Hiring, last 60 days
10
Open roles, 60 days
546
People on these teams
18,048
Showing 50 of 110 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Cloud solutions for the construction industry.
4,390+6%+13%262$6.3BDebt$2.8B, Dec 2025
India's only full-stack financial solutions company for businesses.
4,038−1%−2%17$817MSecondary$75M, May 2022
A complete DevOps platform delivered as a single application.
3,477+1%+7%230$414MPost-IPO equity$268M, Feb 2022
Extremely talented assistants for busy people
1,877+1%+3%YC$12.3MUndisclosed round$139K, Jun 2024
Inspection software for renewable energy & sustainable infrastructure
706+2%+1%1$174MUndisclosed round$60M, Mar 2025
Turning company knowledge into expert teams
517+1%+3%11$78.4MSeries B$62M, Dec 2021
Tech in Asia (YC W15) is the largest English-language technology…
304+2%+1%0$17MUndisclosed round$6.6M, Nov 2017
We automate operations for hospitals and health systems
271+7%+19%13$203MSeries D$85M, Jan 2025
Live home fitness training powered by computer vision.
218+3%+3%YC$299MSeries C$220M, Apr 2021
We’re building a platform to empower cities to plan the best possible…
187+4%+8%0$27MGrant$15M, Jul 2020
Rebuilding healthcare with AI at the core
185−4%+43%3$85.1MSeries B$60M, May 2025
Sunrun for the developing world
158−1%−2%0$78.8MDebt$15M, Oct 2025
On-demand prescription delivery.
158−7%−11%0$74.9MUndisclosed round$14.7M, Jun 2022
Self-Checkout using Computer Vision.
130+8%+13%YC$73.7MSeries B$62.5M, May 2022
AI-powered technology enabler and digital transformer of American…
129+7%+11%0$599MSeries H$50M, Feb 2026
Marketplace for employers to recruit college students and recent grads
96+7%+9%0$37.3MPrivate equity$10M, Oct 2018
Bringing wider access to financial derivatives.
95+10%+30%0$1.5MUndisclosed round$750K, Jun 2015
The world's first private mass transit service providing a commuting…
85 +1%0$6MUndisclosed round$3M, Sep 2016
Beautiful, personalized, interactive developer hubs
77−7%−5%2$10.1MSeries A$9M, Aug 2019
An end-to-end digital banking solution for banks and credit unions
72+4%−9%6$14.3MUndisclosed round$12.5M, Mar 2023
Mobile banking for small business.
720%0%0$5.9MSeed$120K, Aug 2018
Revolutionising the way travellers discover, plan and book a trip
63−3%−5%YC$120KYC investment$120K, Mar 2015
Bluesmart makes smart luggage powered by an app to empower people to…
62+5%+13%0$26MCrowdfunding$2M, Jul 2017
Observability platform to control all of your log data
61+2%−8%0$108MSeries D$50M, Dec 2021
SIRUM is a “match.com” for unused medicine. We connect institutional…
53+6% 0$120KYC investment$120K, Mar 2015
Medical device that provides a more effective, less invasive…
48+12%+41%1$134MSeries D$52M, Oct 2026
Laundry & Dry Cleaning delivered.
47+2%+2%0$13.8MSeries B$6.5M, Mar 2018
Packaging for online brands.
44−4%−4%0$9.4MSeries A$9M, Feb 2018
Personalized drug discovery for blood cancer.
29+4%+4%YC$57.2MSeries B$189K, Jul 2022
Meet Tara AI, your new engineering efficiency co-pilot.
27+8%+17%0$13MNon-equity support$10M, Mar 2024
Targeting Cancer with Click Chemistry
26−10%−7%0$65.4MGrant$1.9M, Dec 2021
Our vision is to build the next generation of iOS or Android, to…
24−4%−4%0$30.1MSeries A$9M, May 2016
Booktrope provides a software platform that makes it easy for…
230%0%0$2.3MAngel$1.2M, Apr 2015
Software for collaborating with content creators and influencers
23−8%−12%0$12.2MSeries B$1.1M, Dec 2018
The affordable way to search, find & communicate with an incarcerated…
200%+5%0$6.7MUndisclosed round$1.5M, Dec 2019
Real-time Nielsen ratings for Brands.Accelerate marketing and product…
19−5%−5%0SeedMar 2015
Helping restaurant employers find & hire better employees faster
17−6%−15%0$2MPrivate equity$400K, Jan 2021
Mobile Productivity(Slack for mobile workforces)
17+6%+6%0$161KNon-equity support$41K, Jul 2019
Fundraising, Volunteer and Donor Management SaaS for nonprofits.
17−6%−6%YC$500KYC investment$500K, Mar 2015
Early, pain-free cancer detection.
17−15%−29%0$5.6MSeed$4M, May 2018
Artificial intelligence for drug discovery.
15−12%−6%0
Paperspace is a cloud platform for building and scaling AI…
150%0%0
Scale new user acquisition with YouTube Creators
140%0%0SeedApr 2015
Point of Sale and Compliance SaaS for Cannabis Dispensaries
14−7%−7%0$2.1MUndisclosed round$2.1M, Jan 2020
Labdoor is building the trusted online drugstore.
9+13%+13%0$10.8MSeries A$3.4M, Nov 2016
End-to-end data science lifecycle management platform.
90%+13%0
NexTravel is a centralized travel booking platform that helps…
70%+40%0$4.5MSeries A$2.4M, Jan 2020
Data Versioning, Data Pipelines, and Data Lineage
6 +20%0$28.1MSeries B$16M, Aug 2020
Upgrading Your Wine Experience
60%0%0$13.5MSeed$12.5M, Mar 2022
Intelligent data security for teams
60%0%0SeedAug 2016

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 W15 companies

How many YC W15 companies are there?

110 companies were in Y Combinator's Winter 2015 batch (W15); 40 are active.

Which YC W15 companies are hiring?

10 companies posted roles in the last 60 days, led by EquipmentShare (262 roles), GitLab (230 roles) and Razorpay (17 roles). 9 mark themselves as hiring on YC's directory.

Which YC W15 companies are growing fastest?

By team growth over 6 months (10+ people): Zenflow (+12%), Mashgin (+8%) and Tara AI (+8%).

Which YC W15 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Zenflow ($52M) and GrubMarket ($50M).

Browse YC companies

By batch

Show fewer

By industry

Show fewer

By location

Show fewer

By founders' past employer

Show fewer