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W24 companies that raised the most in the last 12 months

The 43 YC W24 companies whose latest reported round, after their YC batch and in the last 12 months, was the largest.

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

Showing 43 of 43 companies on this list
#CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
1
The AI for Financial Services.
263+49%+217%5$87.5MUndisclosed round$75M, Aug 2026
2
The fastest way to run your GitHub Actions
65  9$125MSeries C$66M, Oct 2026
3
The multiplayer AI agent builder. Let anyone build, IT controls access
51+28%+122%8$70.1MSeries B$50M, Mar 2026
4
The agentic operating system for legal work
980+81%+321%123$866MSeries D$50M, Apr 2026
5
AI code review agent with complete context of your codebase
45+61%+125%16$80.3MSeries B$50M, Aug 2026
6
Supersonics for the new Jet Age
71+51%+137%45$27.6MSeries B$27.1M, Jul 2026
7
AI agents for healthcare admin
22+16%+100%10$23.5MSeries A$20M, Mar 2026
8
Agentic Marketing Platform
29+32%+93%YC$20.9MSeries A$18.7M, Jun 2026
9
Marketplace for America's most essential assets
230+46%+150%2$22.8MSeries B$17.8M, Sep 2026
10
AI Time Platform for Law Firms
42+100%+320%9$19.6MSeries A$16M, Mar 2026
11
Authoring documents for life sciences in minutes, not months.
28+40%+211%1$16.5MSeries A$16M, Apr 2026
12
Modern OS for the financial back office.
37+61%+185%9$20MSeries A$15.5M, May 2026
13
Mo, the AI QA engineer that bug-bashes your app before every release
55 +17%5$19.2MSeries A$15M, Nov 2025
14
The relationship intelligence platform for enterprise revenue
29+107%+142%3$19.5MSeries A$15M, Jul 2026
15
Sentry for AI Agents
19+58%+138%2$15MSeries A$15M, Sep 2026
16
Modern health insurance for dual income families
42+83%+147%YC$14.5MSeries A$14M, Jul 2026
17
AI Inference Platform for Drug Discovery
21+31%+91%YC$13.6MSeries A$13.6M, Feb 2026
18
Elevated mRNA for transformative medicines.
70%+17%0$13.5MSeed$13M, May 2026
19
Give your voice agents a face
11+38%+83%0$10.5MSeed$10.5M, Dec 2025
20
The AI communication layer for healthcare
31+48%+48%1$10.5MSeed$10M, Sep 2026
21
Risotto auto-solves IT support requests using AI
19+6%+111%0$10.5MSeed$10M, Jan 2026
22
Frontier models and agents you can learn from, audit, and steer.
13−13%−13%0$9.8MSeed$9.3M, Dec 2025
23
Enterprise AI customer support
35+21%+289%1$9.1MSeed$7M, Jan 2026
24
Agent-Driven Engineering
11 +22%YC$5.6MSeed$5.6M, Dec 2025
25
A reimagined workspace with AI at its core
23  YC$7MSeries A$5M, Apr 2026
26
The developer platform for fast and reliable browser agents
7  YC$5.5MSeed$5M, Mar 2026
27
Open-source, extensible AI gateway with observability and evals
22+47%+144%YC$5.5MSeed$5M, Mar 2026
28
Cargo Theft and Fraud Prevention Platform
8+14%−11%YC$4MSeed$4M, Oct 2026
29
Autonomous offensive and defensive cybersecurity platform
33+27%+38%YC$6.2MSeed$3.6M, Jan 2026
30
Curing and preventing type 1 diabetes
7−30%−22%YC$3MSeed$3M, Mar 2026
31
Transparent, AI-powered healthcare TPA.
20+11%+43%YC$2.1MSeed$2.1M, Jan 2026
32
Applied AI Data Research Lab Encoding Human Expertise into Machines…
9+50%+50%YC$2.5MPre-seed$2M, Oct 2026
33
AI-enabled procurement for government
12+9%+9%YC$2MSeries A$1.5M, Jan 2026
34
Global neobank for emerging markets
147+27%+34%0$1.5MUndisclosed round$1.5M, Jan 2026
35
Deploy trustworthy data agent that know your business
2  YC$500KSeed$500K, Jan 2026
36
An all-in-one platform for building internal agents & workflows
26+4%+8%0$500KSeed$500K, Jan 2026
37
AI system design tools for dev teams
6  0$500KSeed$500K, Jan 2026
38
The single platform to run all healthcare operations
16−6%+33%YC$500KSeed$500K, Jan 2026
39
AI platform for phone-first sellers
18+20%+100%YC$500KSeed$500K, Jan 2026
40
The AI operating system for commodity operations
12+71%+71%YC$500KUndisclosed round$500K, Jan 2026
41
AI Employees who love overtime
82  0$500KSeed$500K, Jan 2026
42
Personalized prevention using genetics and AI
1  YC$500KSeed$500K, Jan 2026
43
Yarn is the video product for agentic GTM teams.
13+86%+160%YC$500KSeed$500K, Jan 2026

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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