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YC W18 companies (Winter 2018)

All 146 companies in Y Combinator's Winter 2018 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
10 roles
ReplitW18
  1. 2Swayable9
  2. 3BioRender9
See all 24
Fastest growingteam, 6 months
+30%
Vena MedicalW18
  1. 2ZBiotics+16%
  2. 3Runa+12%
See all 31
Shrinkingteam, 12 months
−50%
AcelyW18
  1. 2SRTX−40%
  2. 3Quantstamp−32%
See all 20
Raised the mostlast 12 months
$400M
ReplitW18
  1. 2Culture Biosciences$80M
  2. 3Jasper.ai$400K
See all 3
Companies
146
Active
77
Hiring, last 60 days
24
Open roles, 60 days
97
People on these teams
22,321
Showing 50 of 146 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Making financial services simple, transparent and delightful.
3,191+3%+13%6$1.3BPost-IPO secondary$183M, Sep 2026
Vanta, the proven leader in automated compliance helping startups…
1,993+6%+34%9$503MSeries D$150M, Jul 2025
All-in-one Finance OS for businesses
1,183+7%+10%6$300MSeries C$100M, Feb 2023
Jasper is a leader in creating content using Artificial Intelligence
1,019−2%+1%2$131MUndisclosed round$400K, Jan 2026
A mental health benefits platform for employers.
920+2%−1%5$167MSeries D$74M, Feb 2021
This isn't just a marketplace; we're shaping the future of digital…
695−2%−3%0$427MSeries C$300M, Jan 2022
Helloverify is a background screening platform (Checkr for India).
641+9%+12%YC$120KSeries A$120K, Mar 2019
Modern insurance brokerage.
542−11%−18%0$310MSeries D$200M, Apr 2022
Veriff is a global AI-native identity platform building trust online
514−6%−1%5$192MSeries C$100M, Jan 2022
Robotics for wind turbine maintenance.
442−2%−5%3$116MSeries B$62.3M, Jun 2025
Contact center AI platform.
358+6%−15%3$214MSeries C$125M, Apr 2022
No code enterprise SaaS for financial control automation.
339−17%−23%7$85MSeries B$30M, Jun 2025
328−4%−12%0$87.8MSeed$40M, Mar 2024
Agile commission software to design, deploy & adapt commission plans.
284+6%+12%2$165MSeries C$100M, Jan 2022
'Figma/Canva for scientists’
266+11%+20%9$17MSeries A$15.3M, Apr 2023
Better payment systems for governments and the communities they serve.
252+2%+8%1$48.1MSeries B$25M, Feb 2022
Shogun empowers brands to create exceptional ecommerce experience.
241+3%+6%0$115MSeries C$67.5M, Jun 2021
Super is the first and leading Indonesian social commerce platform
223+2%−12%0$105MSeries C$70M, Jun 2022
Automating payroll for Latin America.
210+12%+17%YCSeries ASep 2021
Health insurance for remote teams
184+10%+27%YC$47.1MSeries B$35M, Apr 2022
The world's first digital clinic for substance use management
176+3%+5%1$152MSeries C$58M, Mar 2024
Bookkeeping, tax, & tax credits on autopilot for 2,000+ startups
117+4%+13%YC$10MSeed$7M, Nov 2024
Digital financial services for students in Southeast Asia
102−19%−24%0$20MGrant$15M, Nov 2024
96+9%+20%1$18.1MSeries A$15M, Nov 2018
The gold standard in cryptocurrency portfolio tracking and taxes
92−18%−24%YC$102MSeries A$100M, Jan 2022
AI games and entertainment on TV
91−8%−23%YC$107MSeries C$55M, Jul 2024
Tax filing automation for individuals in Latam.
85+8%+29%0$120KSeed$120K, Apr 2021
Better health insurance for mid-size companies
84+18%+65%0$7.5MUndisclosed round$7.3M, Jun 2021
24/7 pediatric clinic in every family's living room
83+4%+9%3$7.7MSeed$4M, Jan 2022
Every student's AI coach for college readiness
79−15%−50%YC$11.3MSeries A$10.5M, Aug 2020
Order ahead at restaurants and get rewards with friends.
78+3%−8%0$95.6MSeries B$70M, Jun 2021
The online company that gets everyone offline
76−3%−16%0$81.4MSeries B$60M, Jun 2022
ZBiotics makes genetically engineered probiotics.
71+16%+25%6$17.2MSecondary$12M, Mar 2025
We're crowdsourced Gartner so IT executives can learn directly from…
69+13%+21%0$10.6MSeries A$6.5M, Apr 2020
Powering a better future for textiles.
64−4%−40%0$191MUndisclosed round$40M, Mar 2025
Swayable predicts consumer opinion and the impact of content
64+3%+25%9SeedMay 2019
We grow cells for biotech companies.
63−19%−18%1$102MSeries C$80M, Dec 2025
3D printing beautiful, high-quality, and sustainable homes.
62−2%−7%0$154MSeries B$52M, Sep 2023
Your AI partner for North America truckload freight
62−14%−18%0$74.4MSeries B$36.5M, Jun 2023
Embedded banking software platform and marketplace
56+2%+2%1$71.5MSeries C$40M, Sep 2022
Security auditing for Web3
52−5%−32%0$3.2MSeries A$3.1M, Jun 2022
Win money betting on yourself playing AAA video games
47−2% YC$14.9MUndisclosed round$750K, Oct 2023
Personalized Performance Nutrition
47−6% 0$7.6MSeries B$7.5M, Sep 2024
Cannabis infused beverages
45−4%−10%0$2.3MSeed$2.3M, Mar 2018
Orangewood builds amazing robots that people want.
45−4%+2%YC$5.6MUndisclosed round$1.5M, Aug 2023
Create remarkable client experiences
44+5%+13%1$10MSeries A$10M, Jan 2023
The self-maintaining knowledge base
42+5%+11%0$15.4MSeries A$11M, Apr 2020
The people, management, and culture operating system for your startup.
42−12%−9%0$120KSecondary$120K, Mar 2022
Modern law firm for startups powered by proprietary technology
37+6%+9%0$75.5MSeries B$65M, Sep 2018
Anjuna enabled organizations to trust any infrastructure
35+6%+13%0$67.1MSeries B$25M, Aug 2024

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).

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