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YC W23 companies (Winter 2023)

All 274 companies in Y Combinator's Winter 2023 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
83 roles
Finni HealthW23
  1. 2Latent24
  2. 3Tennr19
See all 33
Fastest growingteam, 6 months
+100%
LiteLLMW23
  1. 2Haven+83%
  2. 3Warp+61%
See all 73
Shrinkingteam, 12 months
−62%
Stralis AircraftW23
  1. 2Credal.ai−35%
  2. 3Hona−33%
See all 17
Raised the mostlast 12 months
$125M
AvocaW23
  1. 2Numeral$100M
  2. 3Latent$80M
See all 25
Companies
274
Active
199
Hiring, last 60 days
33
Open roles, 60 days
252
People on these teams
7,076
Showing 50 of 274 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Ai-native finance platform for the Middle East
367+25%+79%3$55MSeries A$48M, Aug 2025
Fast, Transparent Patient Experiences
342+16%+56%19$161MSeries C$101M, Jun 2025
AI-powered Sales Agent for Service-Based Industries
270+38%+108%6$126MSeries B$125M, Apr 2026
the AI social facilitator for offline human to human interactions
203+12%+38%YC$16.2MSeries A$10.1M, Dec 2025
The Agentic Support Platform purpose-built for B2B.
183+15%+81%3$51.3MSeries B$31M, Aug 2025
Infrastructure for indirect revenue channels
180+22%+58%14$18.5MSeries A$15M, Feb 2025
The AI-native sales tax solution.
173+25%+63%2$158MSeries C$100M, Sep 2026
Medical language models to automate healthcare operations
137+47%+198%24$93.5MSeries A$80M, Mar 2026
Empowering Autism Care Providers to Go Independent
131+2%+6%83$3.3MSeries A$3.2M, Mar 2024
Metal is an AI-driven operating system for fundraising
127+43%+189%0$4.5MSeed$4.5M, Jun 2026
AI for corporate tax
106+49%+74%1$43.5MSeries B$31M, Feb 2026
Advertising for the new internet
93+3%+19%YC$10MSeries A$10M, May 2026
AI-native Employee Management Platform for High-Growth Companies
87+61%+200%11$85MSeries B$60M, Jun 2026
The Enterprise AI Transformation Platform
85+10%+23%0$19MSeries A$16M, May 2026
Train AI on distributed data
83+2%+1%0$23.6MSeries A$20M, Feb 2024
Automating Securities Compliance
82+8%+49%1$24.5MSeries A$22M, Jul 2026
Email for developers
79+7%+46%5$21.5MSeries A$18M, Dec 2024
Offensive security for the teams that are 100x outnumbered
77+28%+64%YC$23.8MSeries A$17.9M, Mar 2026
Transforming how health systems optimize labor
74+19%+85%12$31MSeries A$31M, Oct 2026
Crypto On and Off Ramp for Latam
69−4%−7%0$7.7MSeed$5M, Aug 2024
Dollar banking for people in Latin America
69+15%+50%0$4.5MYC investment$500K, Apr 2023
AI Servicing for Auto Lenders
67+16%+86%9$60.5MSeries A$60M, Jul 2025
Instantly offer SDKs and API Docs
62+3%−2%0$22.3MSeries A$9M, Apr 2025
The leading AI workforce for the trades.
61+17%+56%1$500KYC investment$500K, Apr 2023
Software delivery built for machine scale.
61 +17%0$15.9MSeries A$10M, Mar 2026
Build the software you wish existed.
60+9%+25%1$5.5MSeed$5M, Aug 2023
Cloud warehousing & supply chain platform in MENA
60+13%+20%YC$10.4MSeries A$9.9M, Sep 2026
Managed marketplace for solar in Latam
59+5%+31%0$500KYC investment$500K, Apr 2023
Hire the best AI Sales employees | AI SDR | AI RevOps | AI EA
57+12%+159%1$1.4MSeed$800K, Jul 2023
Personal Injury Legal Work - Automated
54−5%−33%0$11.6MSeries A$9.5M, Apr 2024
Security infrastructure for developers and agents
49+58%+133%11$18.9MSeries A$16M, Jun 2025
AI Platform for Architects and Engineers
47+4%+47%2$17.1MSeries A$15M, Dec 2025
AI-based full stack observability platform
46−10%−2%YC$7MSeed$6.5M, Aug 2023
Automation platform for logistics
44+29%+38%YC$18.3MSeries A$14.2M, Dec 2024
The Finance Control Centre for African Businesses
43+2%+16%0$2.5MSeed$2M, Dec 2023
Create beautiful videos & docs for any product or process in minutes
41+24%+95%3$11.9MSeries A$10M, Oct 2026
Fully Agentic SWE
40+8%+33%8$3.5MUndisclosed round$534K, Jan 2026
Neobank for global remote workers
38+19%+31%0$1.6MGrant$60K, Jun 2024
Restaurant software that actually works
37+42%+118%YC$500KYC investment$500K, Sep 2024
Production-ready document processing
37+42%+131%0$17.5MSeries A$17M, Jun 2025
Models that keep learning
36−10%−16%0$8MSeed$8M, May 2024
AI-powered care for seniors with chronic disease
35+3%+40%6$500KYC investment$500K, Mar 2023
Enterprise-Grade OpenTelemetry
35 +21%0$13.5MSeries A$13M, Sep 2024
Developing long-lasting drug formulations 50% faster
35−5%−5%0$16.5MSeries A$12M, Mar 2025
AI Wealth Manager
34+3%+26%YC$2.7MSeed$2.6M, May 2023
Open source LLM engineering platform
33+74%+94%0$4MSeed$4M, Nov 2023
Our mission is to make Voice AI accessible and useful to all.
33−3%−15%0$23.6MSeed$21M, Nov 2024
AI-Powered Accounting
32−3%+3%YC$16.5MSeries A$13M, Dec 2024
32−3%−20%0$25.5MSeries A$20M, Jul 2025
Automate data-driven slide decks and documents with AI
31+11%+3%YC$12.9MSeries A$11M, Oct 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 W23 companies

How many YC W23 companies are there?

274 companies were in Y Combinator's Winter 2023 batch (W23); 199 are active.

Which YC W23 companies are hiring?

33 companies posted roles in the last 60 days, led by Finni Health (83 roles), Latent (24 roles) and Tennr (19 roles). 79 mark themselves as hiring on YC's directory.

Which YC W23 companies are growing fastest?

By team growth over 6 months (10+ people): LiteLLM (+100%), Haven (+83%) and Warp (+61%).

Which YC W23 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Avoca ($125M), Numeral ($100M) and Latent ($80M).

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