CrustdataGet an API key

S24 companies that raised the most in the last 12 months

The 25 YC S24 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 25 of 25 companies on this list
#CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
1
Data centers in space
66+57%+128%YC$444MSeries A$250M, Aug 2026
2
AI app builder that turns your ideas into monetizable software.
410+34%+193%33$230MSeries C$130M, Jul 2026
3
Corgi is building an AI financial infrastructure company
402+88%+272%16$439MSeries B$64M, Sep 2026
4
Practical, general-purpose robots for repetitive industrial tasks
38+100%+192%YC$62MSeries A$50M, Oct 2026
5
Growth through always‑on consumer understanding
103+54%+472%9$55.8MSeries A$50M, Sep 2026
6
Simulation & Evaluation that scales voice and chat AI agents
26+13%+136%2$31.8MSeries A$28M, Jun 2026
7
AI employee for consumer lending
19+58%+111%8$24.5MSeries A$24M, Sep 2026
8
AI agent for Accounts Receivable
44+76%+389%2$21.7MUndisclosed round$17M, Aug 2026
9
The organic growth engine for financial advisors
41+32%+173%3$21.8MSeries A$17M, Dec 2025
10
Automating Deal Decks for Commercial Real Estate Brokers
35+17%+106%8$21.3MSeries A$16.5M, Jul 2026
11
AI call centers
47+62%+135%4$16.5MSeries A$16M, Apr 2026
12
AI voice that sells
33+65%+313%12$14.5MSeed$14M, Feb 2026
13
The GPU sandbox company
14+8%+56%YC$17.6MSeries A$13M, Aug 2026
14
Genetically engineered viruses that teach your immune system to kill…
18+6%+38%0$9.7MSeed$9.1M, Jun 2026
15
Automate security and privacy reviews
25+47%+67%2$13.4MSeed$8.4M, Feb 2026
16
An AI-powered CAD software
6−25% YC$9.4MSeed$7.4M, Oct 2026
17
In-Space Refueling
60% 3$6.8MSeed$6.3M, Jun 2026
18
The autonomous data engineer for the mid-market
16+45%+129%5$6.3MSeed$5.8M, Sep 2026
19
Healthcare personal assistants for Medicare patients.
76  1$8.4MSeed$5M, Mar 2026
20
Renewable infrastructure deployment at scale.
12+140% 0$4.4MSeed$3.9M, Apr 2026
21
Create professional videos in minutes with AI, online or via API
130%−13%YC$3.3MSeed$3.2M, Sep 2026
22
Understand why your AI agent breaks. Iterate fast to fix it.
50% 0$3.5MSeed$3M, Mar 2026
23
Helping industrial manufacturers win more business at the best price.
6  1$2.5MSeed$2.5M, Jan 2026
24
The Agent Analytics Platform
5−29%−44%0$2.2MPre-seed$2.2M, May 2026
25
Find & resolve issues in data center engineering & operations using AI
14+40%+100%2$500KUndisclosed round$500K, Jul 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 S24 companies

How many YC S24 companies are there?

248 companies were in Y Combinator's Summer 2024 batch (S24); 232 are active.

Which YC S24 companies are hiring?

35 companies posted roles in the last 60 days, led by Emergent (33 roles), Corgi (16 roles) and Simple AI (12 roles). 97 mark themselves as hiring on YC's directory.

Which YC S24 companies are growing fastest?

By team growth over 6 months (10+ people): Plume (+140%), Codes Health (+103%) and Ultra (+100%).

Which YC S24 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Starcloud ($250M), Emergent ($130M) and Corgi ($64M).

Browse YC companies

By batch

Show fewer

By industry

Show fewer

By location

Show fewer

By founders' past employer

Show fewer