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YC W24 companies (Winter 2024)

All 248 companies in Y Combinator's Winter 2024 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
123 roles
LegoraW24
  1. 2Astro Mechanica45
  2. 3Retell AI20
See all 33
Fastest growingteam, 6 months
+107%
CentralizeW24
  1. 2PointOne+100%
  2. 3Zep AI+100%
See all 63
Shrinkingteam, 12 months
−50%
Marr LabsW24
  1. 2ego−15%
Raised the mostlast 12 months
$75M
Model MLW24
  1. 2Blacksmith$66M
  2. 3Legora$50M
See all 43
Companies
248
Active
208
Hiring, last 60 days
33
Open roles, 60 days
326
People on these teams
5,632
Showing 50 of 248 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
The agentic operating system for legal work
980+81%+321%123$866MSeries D$50M, Apr 2026
AI employees that take on real work, starting with sales
342+75%+4,786%2$46.1MSeries A$25M, Apr 2025
The AI for Financial Services.
263+49%+217%5$87.5MUndisclosed round$75M, Aug 2026
Marketplace for America's most essential assets
230+46%+150%2$22.8MSeries B$17.8M, Sep 2026
Supercharge Your Contact Center Operations with AI Phone Agents
196+45%+109%20$4.7MSeed$4.6M, Apr 2024
Global neobank for emerging markets
147+27%+34%0$1.5MUndisclosed round$1.5M, Jan 2026
The complete agentic document platform
99+60%+175%14$108MSeries B$75M, Oct 2025
AI Workforce for the Insurance Industry
71+42%+209%5$30MSeries A$25M, Oct 2025
Supersonics for the new Jet Age
71+51%+137%45$27.6MSeries B$27.1M, Jul 2026
AI Applied Research
62−2%+5%0$17.5MSeries A$17M, Jun 2025
AI lipsync tool for video content creators
61+42%+56%0$6.4MGrant$250K, Oct 2024
Earn airline miles on hotels and everyday spend.
58+49%+38%1Undisclosed roundJan 2026
Mo, the AI QA engineer that bug-bashes your app before every release
55 +17%5$19.2MSeries A$15M, Nov 2025
Mobile carrier for businesses in Brazil
53+23%+39%0$3.3MSeed$1.9M, May 2024
The multiplayer AI agent builder. Let anyone build, IT controls access
51+28%+122%8$70.1MSeries B$50M, Mar 2026
Alex is the AI recruiter for hiring great people.
47+4%+31%3$20.5MSeries A$17M, Sep 2025
AI code review agent with complete context of your codebase
45+61%+125%16$80.3MSeries B$50M, Aug 2026
AI Time Platform for Law Firms
42+100%+320%9$19.6MSeries A$16M, Mar 2026
Modern health insurance for dual income families
42+83%+147%YC$14.5MSeries A$14M, Jul 2026
All-in-one AI platform for outbound sales
38−7%+9%1$1.6MYC investment$500K, Apr 2024
AI-native investment bank for small businesses
38+31%+58%YC$16.8MSeries A$12M, Jul 2025
Modern OS for the financial back office.
37+61%+185%9$20MSeries A$15.5M, May 2026
Enterprise AI customer support
35+21%+289%1$9.1MSeed$7M, Jan 2026
AI for risk and compliance
34+21%+70%1$3.5MSeed$3M, Aug 2024
Autonomous offensive and defensive cybersecurity platform
33+27%+38%YC$6.2MSeed$3.6M, Jan 2026
Speaking coach for non-native English professionals
32+14%+14%0$2.5MSeed$2M, Jun 2024
The AI communication layer for healthcare
31+48%+48%1$10.5MSeed$10M, Sep 2026
Frontier coding data for training and evaluating LLMs
31−3%+55%0$18.2MSeries A$15M, Oct 2025
Card issuer processor and banking stack for businesses in Sub-…
30+7%+30%0$500KYC investment$500K, Jan 2024
Control what AI says about you
30 +3%YC$5.5MYC investment$500K, Feb 2024
The relationship intelligence platform for enterprise revenue
29+107%+142%3$19.5MSeries A$15M, Jul 2026
Agentic Marketing Platform
29+32%+93%YC$20.9MSeries A$18.7M, Jun 2026
Open Source AI Chat
28−24%−18%0$10.5MSeed$10M, Mar 2025
AI applied research lab building synthetic sapience; human-like AI
28−12%−15%0$6.7MSeed$6.7M, Oct 2025
Business banking for cross-border SMBs & Startups
28+40%+47%YC$1.9MPre-seed$1.9M, Apr 2024
Authoring documents for life sciences in minutes, not months.
28+40%+211%1$16.5MSeries A$16M, Apr 2026
AI Agents for Hospitality
27+4%+4%YC$3.6MSeed$3.1M, Apr 2025
Validated mental health support in your pocket, anytime.
26+30%+53%YCSeedMar 2024
An all-in-one platform for building internal agents & workflows
26+4%+8%0$500KSeed$500K, Jan 2026
Go from 3D models to CAD drawings using AI
25−4%+108%0$500KYC investment$500K, Feb 2024
AI Creative Strategist
24+14%+50%YC$2.6MYC investment$500K, Mar 2024
A reimagined workspace with AI at its core
23  YC$7MSeries A$5M, Apr 2026
Open-source, extensible AI gateway with observability and evals
22+47%+144%YC$5.5MSeed$5M, Mar 2026
AI agents for healthcare admin
22+16%+100%10$23.5MSeries A$20M, Mar 2026
An AI-powered supply chain compliance engine
22+10%+69%YC$3.8MSeed$3.3M, Jun 2024
AI Inference Platform for Drug Discovery
21+31%+91%YC$13.6MSeries A$13.6M, Feb 2026
Open source alternative to AWS
20+18%+18%YC$16MSeed$16M, Mar 2024
Accelerate Medication Access with AI
20+54%+150%14Undisclosed roundApr 2024
LLM Security and Compliance
20+18%+33%YC$3.2MSeed$3.2M, Apr 2024
Data services for finance and operations at PE-backed companies.
20+25%+54%YC$2.7MSeed$2.2M, Jul 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 W24 companies

How many YC W24 companies are there?

248 companies were in Y Combinator's Winter 2024 batch (W24); 208 are active.

Which YC W24 companies are hiring?

33 companies posted roles in the last 60 days, led by Legora (123 roles), Astro Mechanica (45 roles) and Retell AI (20 roles). 93 mark themselves as hiring on YC's directory.

Which YC W24 companies are growing fastest?

By team growth over 6 months (10+ people): Centralize (+107%), PointOne (+100%) and Zep AI (+100%).

Which YC W24 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Model ML ($75M), Blacksmith ($66M) and Legora ($50M).

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