CrustdataGet an API key

YC S14 companies (Summer 2014)

All 78 companies in Y Combinator's Summer 2014 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
49 roles
Helion EnergyS14
  1. 2ShipBob35
  2. 3Checkr28
See all 8
Fastest growingteam, 6 months
+28%
OkloS14
  1. 2Helion Energy+11%
  2. 3Backpack+7%
See all 11
Shrinkingteam, 12 months
−24%
Ginkgo BioworksS14
  1. 2Protocol Labs−15%
  2. 3PicnicAI−13%
See all 5
Raised the mostlast 12 months
$500M
Helion EnergyS14
Companies
78
Active
21
Hiring, last 60 days
8
Open roles, 60 days
122
People on these teams
7,330
Showing 50 of 78 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
People infrastructure for the future of work
1,846+3%+14%28$740MUndisclosed round$61.1M, May 2025
Providing Amazon level logistics to e-commerce businesses.
1,730+6%+14%35$331MSeries E$200M, Jun 2021
Building the world's first fusion power plant
594+11%+34%49$1.5BSeries G$500M, Jun 2026
Customer communications hub for building strong relationships
579+6%+13%4$204MSeries D$65M, Jun 2022
Our mission is to make biology easier to engineer.
487−7%−24%1$1.6BGrant$775M, Apr 2024
Emission free, always on power from advanced fission power plants.
418+28%+75%3$1.4BPost-IPO equity$1B, Sep 2026
Intelligence to accelerate human health.
306−15%−13%YC$97MSeries C$60M, Jun 2022
Quantum coherent supercomputing.
204+6%+19%0$883MGrant$100M, May 2026
Modern, on-demand lawn care service. Get a quote in two minutes.
152+2%+3%0$1.9MSeed$1.9M, Apr 2017
Rebuilding data in advertising to protect privacy
108−3% 1$105MSeries C$75M, Nov 2021
The AI Command Center for outbound and ABM
108+5%+2%1$22.4MSeries A$20M, Oct 2021
Protocol Labs makes internet protocols: IPFS, Filecoin, and more.
99−9%−15%0$13.4MUndisclosed round$2.5M, Mar 2024
Crypto-currency trading platform.
95+3%+3%0$23.1MSeries B$23M, Mar 2025
The best new products in tech
85+5%+12%0$7.5MYC investment$440K, Oct 2014
Try-at-home service for fine spirits
78−1%−2%0$13.9MUndisclosed round$5M, Aug 2019
Marketing automation for event promoters (email, sms, ads, CRM)
78+3%+11%YC$27.1MSecondary$27M, Oct 2026
Get measured by your phone in under 30 seconds for perfect fitting…
53−2%−5%0$7.2MSeries A$5.2M, Jun 2018
Mobile marketing analytics and infrastructure
37+3%+3%0$2.5MSeed$2.5M, Jun 2016
Security Guard Company Marketplace
340%−3%0Undisclosed roundOct 2015
Nanotechnology-enabled coatings for automotive and defence sectors
33+6%+32%0$7.9MGrant$4.3M, Jan 2026
Marketplace to get stuff from overseas
31+7%+3%0$120KSeed$120K, Nov 2019
Clara is a human-in-the-loop assistant that helps automate repetitive…
27+4%−4%0$11.6MSeries A$7.2M, Jul 2017
The No Infrastructure Platform as a Service
24 −14%0$12.1MSeries A$12M, Jun 2019
PersistIQ is a free email automation platform to send a small batch…
18−14%−14%0$1.7MSeed$1.7M, Jul 2015
Tech nonprofit building the future of public services.
16−16%+23%0$125KGrant$25K, Mar 2025
Better coffee for less money
11+57%+57%0$320KSeed$120K, May 2015
Data platform for metagenomics and the microbiome.
90%0%0$120KUndisclosed round$120K, Jan 2017
We make bitcoin simple.
8−38%−47%0$1.2MYC investment$120K, Aug 2014
Waze for parking
8−11%−11%0$4.4MSeed$2.3M, Mar 2020
Mobile surveys for researchers
70%0%0$144KPre-seed$120K, Mar 2015
Frictionless, modern identity verification that starts with just a…
6−14% 0$2.1MYC investment$120K, Aug 2014
Create, Share, Play Mobile Games on the iPad.
5−29%−29%0$141KGrant$1K, Jan 2019
"Name Your Price" for products
50%0%0$1.2MSeed$1M, Oct 2014
Real time B2B hotel room marketplace for various industries…
5  0
Nano-diamonds for cancer detection
4  0$1.7MSeed$1.7M, Aug 2014
Autopilot for Accounts Receivable
4  0$2.9MSeed$1.4M, Oct 2015
Software to track, manage, and procure HVAC for commercial real…
3  0Undisclosed roundJan 2019
Subscription billing, rate plan management and analytics as a…
2  0Undisclosed roundNov 2015
Used car marketplace
2  0$1.3MYC investment$120K, Aug 2014
Keurig machine for smoothies.
2  0$6.9MUndisclosed round$6.9M, Feb 2017
Homejoy for massage
2  0SeedAug 2014
Doblet solves the phone battery problem. We're building the first…
1  0$1.4MSeed$1.3M, Sep 2014
Ride sharing for small planes
1  0$145KYC investment$120K, Aug 2014
Replaces paper patient lists for doctors.
1  0$500KUndisclosed round$500K, Jan 2017
Naytev automates paid and organic social media management in one place
1  0$1.3MUndisclosed round$1.3M, Jan 2018
Real-Time Classifieds
1  0SeedJul 2014
Simple payments and tax compliance for your contract workforce.
1  0$2.2MUndisclosed round$2.1M, Dec 2015
AI-assisted professional networking.
1  0$630KSeries B$630K, Jan 2016
Whatsapp for voice
  
Communities for expecting and new parents.
  0

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 S14 companies

How many YC S14 companies are there?

78 companies were in Y Combinator's Summer 2014 batch (S14); 21 are active.

Which YC S14 companies are hiring?

8 companies posted roles in the last 60 days, led by Helion Energy (49 roles), ShipBob (35 roles) and Checkr (28 roles). 5 mark themselves as hiring on YC's directory.

Which YC S14 companies are growing fastest?

By team growth over 6 months (10+ people): Oklo (+28%), Helion Energy (+11%) and Backpack (+7%).

Which YC S14 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Helion Energy ($500M).

Browse YC companies

By batch

Show fewer

By industry

Show fewer

By location

Show fewer

By founders' past employer

Show fewer