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Fastest growing F24 companies

The 21 YC F24 companies whose team grew the most in the last 6 months (active companies with 10+ people).

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

Showing 21 of 21 companies on this list
#CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
1
The deterministic layer for frontier intelligence
13+117% YC$7.2MSeed$7.2M, Feb 2025
2
The high-performance file system that connects AI to data
17+70%+240%0$18.2MSeries A$11M, Apr 2026
3
AI copilot for construction estimators
10+67%+67%YC$500KYC investment$500K, Dec 2024
4
intelligent interactions
51+65%+132%13$18.6MSeed$15M, Jul 2026
5
Enterprise systems delivery without the turbulence.
19+58%+138%2$7.7MSeed$7.2M, Aug 2025
6
AI RCM. Increase net revenue by 16%.
19+58%+171%1$4.8MSeed$4.3M, Nov 2025
7
Personal doctors through chat
12+50%+71%0$500KYC investment$500K, Jan 2026
8
Wire Harnesses in as little as 7 days
13+44% 1
9
Building AI employees for car dealers
23+44%+77%0$1.5MPre-seed$1.5M, Dec 2024
10
Real-time B2B data via simple APIs
47+38%+96%YC$12MSeed$6M, Oct 2025
11
The legal backoffice for every company. For founders and AI agents.
30+30%+150%4$3.3MSeed$3.3M, Apr 2026
12
Agents for dental operations
10+25%+11%YC
13
The Mobile Development Platform
12+20%+140%YC$1.1MPre-seed$1.1M, Oct 2024
14
AI Workers for Healthcare Orgs to Find, Call & Schedule More Patients.
12+20%+100%YC$500KYC investment$500K, Dec 2024
15
AI Compliance Analysts for Banks & Fintechs
25+19%+127%0$7.6MSeed$7.1M, Feb 2026
16
Find and move money after a death
14+17%+27%0$6.5MSeed$6.5M, Dec 2024
17
Enter your domain & Origami gets you customers.
22+16%+16%0$2.5MConvertible note$2M, Jun 2025
18
AI tutors for students.
90+15%+23%0$3.9MSeed$3.4M, Mar 2025
19
AI-powered demand forecasting for retail
18+13%+38%0$3.7MSeed$3.2M, Oct 2025
20
Voice AI and Chat AI agents: Testing and Observability
19+12%+36%1
21
We help medical practices become AI-native
32+10%+45%1$4.4MSeed$3.9M, Dec 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 F24 companies

How many YC F24 companies are there?

94 companies were in Y Combinator's Fall 2024 batch (F24); 88 are active.

Which YC F24 companies are hiring?

11 companies posted roles in the last 60 days, led by telli (13 roles), Beglaubigt.de (4 roles) and Laminar (2 roles). 39 mark themselves as hiring on YC's directory.

Which YC F24 companies are growing fastest?

By team growth over 6 months (10+ people): CTGT (+117%), Archil (+70%) and Fresco (+67%).

Which YC F24 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: telli ($15M), Archil ($11M) and Sphinx ($7.1M).

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