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YC S23 companies (Summer 2023)

All 220 companies in Y Combinator's Summer 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
36 roles
HappyRobotS23
  1. 2Outset25
  2. 3Langdock12
See all 37
Fastest growingteam, 6 months
+110%
ShadeformS23
  1. 2Prosper+100%
  2. 3Readily+100%
See all 66
Shrinkingteam, 12 months
−35%
HockeyStackS23
  1. 2Tempo−12%
  2. 3AgentCollect−9%
See all 7
Raised the mostlast 12 months
$150M
HappyRobotS23
  1. 2Singularity$80M
  2. 3Bretton AI$75M
See all 31
Companies
220
Active
178
Hiring, last 60 days
37
Open roles, 60 days
163
People on these teams
4,858
Showing 50 of 220 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Intelligence that runs your operations.
260+83%+192%36$211MSeries C$150M, Aug 2026
The AI Native ERP for the fastest growing companies.
199+45%+165%11$108MSeries B$65M, Oct 2025
All-in-one POS for liquor stores
198+26%+37%YC$22.6MSeries A$15M, Oct 2026
The World's First Multi-Agent System for Procurement
149+22%+192%6$30MSeries A$30M, Mar 2026
AI Support Agent for Enterprises.
128+24%+156%3$64.6MSeries A$61M, Aug 2025
The enterprise platform for AI phone calls
123+4%+38%5$106MSeries C$50M, Jun 2026
AI-powered user interviews
113+43%+232%25$51.3MSeries B$30M, Dec 2025
AI-native operations for the banks
107+16%+47%1$95.3MSeries B$75M, Feb 2026
Helping businesses in emerging markets make pay their international…
102+13%+67%YC$18MSeries A$18M, Feb 2025
AI-Native CPQ & Billing for Modern Pricing Models
83+9%+20%YC$4.5MSeed$4M, Sep 2025
Plaid for Telematics Data in Commercial Trucking
74+28%+90%1$23.1MSeries A$20M, Jul 2026
The all-in-one AI platform for companies.
74+51%+155%12$3.5MSeed$3M, Apr 2024
AI patent drafting, prosecution, litigation and more for legal teams.
72+33%+125%3$55MSeries B$40M, Dec 2025
Claims infrastructure for African health insurance
71+6%+8%0$785KDebt$285K, Jun 2026
AI Phone Agents for Healthcare Operations
70+100%+400%4$35MSeries A$30M, Jun 2026
Revenue Activation Platform
69+30%+103%6$18.3MSeries A$15M, Sep 2025
End-to-end content, learning, & deal intelligence for B2B sales teams
68+45%+183%YC$55MSeries B$40M, Feb 2026
iMessage for Sales
65+18%+30%1
The operating system for inbound B2B revenue
63−41%−35%YC$29.2MUndisclosed round$26M, Apr 2026
Virtual Care for Type 2 Diabetes Reversal
62+11%+24%2$500KYC investment$500K, Sep 2023
Automating Compliance for Construction
62+51%+148%YC$21.8MSeries A$15M, Jul 2026
Building and Protecting an Exciting Future
62  0$80MSeries A$80M, Jul 2026
Make Banking Magical
60+18%+40%3$32.9MSeries A$29M, Aug 2025
The fastest way to build AI assistants on technical content
51+11%+50%YC$3.7MSeed$3.2M, Oct 2024
Stripe for HSA/FSA payments
51+13%+31%YC$18.2MSeries A$15M, Sep 2025
AI that finds the right buyers and books sales meetings
50−2%−2%0$3MSeed$3M, Apr 2026
Navigating patients to the right place, first time.
46+10%+28%5$3.9MSeed$3.4M, Jul 2024
Visual Editor for React, powered by AI
43−14%−12%YC$5MSeed$5M, Oct 2025
AI Customer Service Agents for trades and field services
39+50%+117%1$16.4MSeries A$12.9M, Jan 2026
The freshest data APIs for AI sales, recruiting, & growth products
380%+3%0$4.3MSeed$4.3M, Jan 2024
A construction payroll and compliance platform built for specialty…
38−7%+100%YC$17MSeries A$10M, Mar 2026
Unmanned airships for inspecting our critical assets
37+37%+42%1$19MSeries A$14.6M, Oct 2026
Personalized learning built for schools
37+19%+76%YC$15.5MSeries ANov 2025
AI Operating System for Private Market Investors
36−3%+29%1$3MSeed$3M, Feb 2024
AI enabled marketplace matching trucks with jobs
33+18%+27%2$15.5MSeries A$15M, Oct 2025
Open Source CRM
31−6%−9%YC$5MSeed$5M, Nov 2024
Digital-native home painting franchise
31+24%+19%1$15MSeed$11M, Sep 2023
Your 24/7 AI Recruiter
28+4%+27%0$2MSeed$1.5M, Jan 2025
AI Scribe for veterinarians. Saving time and improving patient care.
28−24%+22%0$500KYC investment$500K, Sep 2023
Headcount & Compensation Management
28−3%+4%0$18.3MSeed$13.5M, Oct 2026
TurboTax for Medicaid
28+75%+65%1$22.3MSeries A$18.3M, Jul 2025
AI powered HR and Recruitment for people teams
27−25%−4%YC$16.5MSeries A$12M, Oct 2025
The cheapest way to borrow money
26+73%+225%1$500KSeed$500K, Jun 2026
Farm Genetics Made Easy - Using DNA and Software
25+14%+127%0$5.8MSeed$5.3M, Dec 2025
AI Compliance Platform for Healthcare Organizations
24+100%+300%1$11MSeries A$11M, Oct 2026
Software that streams data from databases to warehouses in real-time
23+21%+92%2$18.9MSeries A$15.1M, Jan 2026
Running clinical trials with AI
23+10%+15%0Pre-seed (before YC)Apr 2023
Build and publish web apps in minutes. No coding required.
23+15%+21%0SeedJan 2025
AI Powered All-In-One Payroll, HR + Recruiting
22+22%+57%YC$17.1MSeries A$12M, Apr 2026
AI agents that run insurance operations
22+22%+100%1$4.8MSeed$2.3M, Sep 2025

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 S23 companies

How many YC S23 companies are there?

220 companies were in Y Combinator's Summer 2023 batch (S23); 178 are active.

Which YC S23 companies are hiring?

37 companies posted roles in the last 60 days, led by HappyRobot (36 roles), Outset (25 roles) and Langdock (12 roles). 87 mark themselves as hiring on YC's directory.

Which YC S23 companies are growing fastest?

By team growth over 6 months (10+ people): Shadeform (+110%), Prosper (+100%) and Readily (+100%).

Which YC S23 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: HappyRobot ($150M), Singularity ($80M) and Bretton AI ($75M).

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