CrustdataGet an API key

W18 companies hiring the most right now

The 24 YC W18 companies with the most distinct open roles posted in the last 60 days.

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

Showing 24 of 24 companies on this list
#CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
1
Collaborative in-browser IDE
738  10$873MCorporate round$400M, May 2026
2
Swayable predicts consumer opinion and the impact of content
64+3%+25%9SeedMay 2019
3
'Figma/Canva for scientists’
266+11%+20%9$17MSeries A$15.3M, Apr 2023
4
Vanta, the proven leader in automated compliance helping startups…
1,993+6%+34%9$503MSeries D$150M, Jul 2025
5
No code enterprise SaaS for financial control automation.
339−17%−23%7$85MSeries B$30M, Jun 2025
6
Making financial services simple, transparent and delightful.
3,191+3%+13%6$1.3BPost-IPO secondary$183M, Sep 2026
7
All-in-one Finance OS for businesses
1,183+7%+10%6$300MSeries C$100M, Feb 2023
8
ZBiotics makes genetically engineered probiotics.
71+16%+25%6$17.2MSecondary$12M, Mar 2025
9
Veriff is a global AI-native identity platform building trust online
514−6%−1%5$192MSeries C$100M, Jan 2022
10
A mental health benefits platform for employers.
920+2%−1%5$167MSeries D$74M, Feb 2021
11
A place for independent writing.
4,388  3$200MSecondary$100M, Jan 2026
12
Robotics for wind turbine maintenance.
442−2%−5%3$116MSeries B$62.3M, Jun 2025
13
Contact center AI platform.
358+6%−15%3$214MSeries C$125M, Apr 2022
14
24/7 pediatric clinic in every family's living room
83+4%+9%3$7.7MSeed$4M, Jan 2022
15
Jasper is a leader in creating content using Artificial Intelligence
1,019−2%+1%2$131MUndisclosed round$400K, Jan 2026
16
Agile commission software to design, deploy & adapt commission plans.
284+6%+12%2$165MSeries C$100M, Jan 2022
17
PROVEN is using AI, data and personalization to disrupt CPG
29−9%−15%2$18.2MSeries A$12.2M, Sep 2023
18
Better payment systems for governments and the communities they serve.
252+2%+8%1$48.1MSeries B$25M, Feb 2022
19
The world's first digital clinic for substance use management
176+3%+5%1$152MSeries C$58M, Mar 2024
20
96+9%+20%1$18.1MSeries A$15M, Nov 2018
21
We grow cells for biotech companies.
63−19%−18%1$102MSeries C$80M, Dec 2025
22
Embedded banking software platform and marketplace
56+2%+2%1$71.5MSeries C$40M, Sep 2022
23
Create remarkable client experiences
44+5%+13%1$10MSeries A$10M, Jan 2023
24
Making Anime Real
33+6%+18%1$120KSeed$120K, Aug 2018

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 W18 companies

How many YC W18 companies are there?

146 companies were in Y Combinator's Winter 2018 batch (W18); 77 are active.

Which YC W18 companies are hiring?

24 companies posted roles in the last 60 days, led by Replit (10 roles), Swayable (9 roles) and BioRender (9 roles). 25 mark themselves as hiring on YC's directory.

Which YC W18 companies are growing fastest?

By team growth over 6 months (10+ people): Vena Medical (+30%), ZBiotics (+16%) and Runa (+12%).

Which YC W18 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Replit ($400M), Culture Biosciences ($80M) and Jasper.ai ($400K).

Browse YC companies

By batch

Show fewer

By industry

Show fewer

By location

Show fewer

By founders' past employer

Show fewer