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YC companies that raised the most in the last 12 months

The 100 Y Combinator 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 100 of 100 companies on this list
#CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
1
Seamless mobility to, through, and from space. It starts with 100%…
W21451+17%+33%4$2.4BSeries E$1B, Sep 2026
2
Whatnot is the largest livestream shopping platform in the U.S.
W202,223+13%+35%9$1.5BSeries G$547M, Aug 2026
3
Building the world's first fusion power plant
S14594+11%+34%49$1.5BSeries G$500M, Jun 2026
4
Collaborative in-browser IDE
W18738  10$873MCorporate round$400M, May 2026
5
Economically and environmentally sustainable supersonic travel
W16365+10%+22%14$732MUndisclosed round$300M, Dec 2025
6
Consumer fintech for Indonesia
S18939+2%+15%23$515MSeries C$270M, Aug 2026
7
Helping businesses make and accept payments from anywhere in Africa.
S16893+3%−1%0$476MUndisclosed round$250M, Jul 2026
8
Web search rebuilt for LLMs
S21243+46%+117%28$357MSeries C$250M, May 2026
9
Data centers in space
S2466+57%+128%YC$444MSeries A$250M, Aug 2026
10
The first public safety operating system that eliminates crime.
S171,446+1%+6%32$1.2BSeries I$200M, Apr 2026
11
Bluetooth to Space
W2288+16%+31%2$291MSeries C$200M, Sep 2026
12
RADAR is building technology to completely transform the in-store…
W13241+10%+23%4$310MSeries B$170M, May 2026
13
The leading Composable CDP and AI Decisioning platform
S19658+14%+51%52$332MSeries D$150M, Apr 2026
14
Build in a weekend. Scale to millions.
S20484+38%+106%0$1.2BSeries F$150M, Oct 2026
15
Intelligence that runs your operations.
S23260+83%+192%36$211MSeries C$150M, Aug 2026
16
Building foundational AI for speech transcription and understanding.
W16387+23%+64%42$216MSeries C$130M, Aug 2026
17
Transform your decision-making with reliable AI agents in weeks, not…
S20237+11%+22%2$209MSeries C$130M, Jun 2026
18
AI app builder that turns your ideas into monetizable software.
S24410+34%+193%33$230MSeries C$130M, Jul 2026
19
AI + Robotics for the Built World
W16318+2%−5%11$347MUndisclosed round$125M, Aug 2026
20
AI-powered Sales Agent for Service-Based Industries
W23270+38%+108%6$126MSeries B$125M, Apr 2026
21
The autonomous revenue cycle management platform.
W20243+19%+45%2$220MSeries D$120M, Jul 2026
22
Self-Driving Customer Care
W16310+16%+34%14$217MSeries C$110M, Apr 2026
23
International banking infrastructure for global startups.
S20324+5%+13%3$653MSeries C$110M, Sep 2026
24
quantum-accelerated AI servers
X2548+50%+118%8$139MSeries A$105M, Mar 2026
25
Telehealth dietitians covered by insurance
W214,256  7$213MSeries C$100M, May 2026
26
Banking, corporate cards, stablecoin payments, available globally.
S2198+31%+63%3$160MSeries C$100M, Apr 2026
27
The AI-native sales tax solution.
W23173+25%+63%2$158MSeries C$100M, Sep 2026
28
Our operations software makes it easier to run--and grow--your cafe
S19221+3%+11%21$352MUndisclosed round$96M, Aug 2026
29
We grow cells for biotech companies.
W1863−19%−18%1$102MSeries C$80M, Dec 2025
30
AI Agents for Recruiting
S22158+70%+187%33$116MSeries B$80M, Mar 2026
31
Medical language models to automate healthcare operations
W23137+47%+198%24$93.5MSeries A$80M, Mar 2026
32
Building and Protecting an Exciting Future
S2362  0$80MSeries A$80M, Jul 2026
33
All-in-one app for internal communication and HR
W22752+22%+79%1$77.5MSeries A$77.5M, Feb 2026
34
Robotic production capacity for the pharma manufacturing industry
S1676+7%+31%10$97.7MSeries B$75M, Oct 2026
35
Vertical AI for Audit & Advisory Firms
S20257+24%+58%6$125MSeries C$75M, Feb 2026
36
Moving Things Around in Space, Imaging Space Objects When We're Not
S21211  2$128MSeries B$75M, Apr 2026
37
America's #1 Sports Trading App
S2298+72%+165%9$99.9MSeries B$75M, Feb 2026
38
Building the library for superintelligence.
S2262+35%+63%16$89.5MSeries B$75M, Sep 2026
39
AI-native operations for the banks
S23107+16%+47%1$95.3MSeries B$75M, Feb 2026
40
The AI for Financial Services.
W24263+49%+217%5$87.5MUndisclosed round$75M, Aug 2026
41
Company Brain for people and agents to work in harmony.
S1877−57%−57%11$90.4MUndisclosed round$70M, Sep 2026
42
TRM is building a safer world for billions of people.
S19481+14%+36%67$220MSeries C$70M, Sep 2026
43
The fastest way to run your GitHub Actions
W2465  9$125MSeries C$66M, Oct 2026
44
Get up and running with large language models.
W2177+38%+64%0$80.1MSeries B$65M, Jul 2026
45
Corgi is building an AI financial infrastructure company
S24402+88%+272%16$439MSeries B$64M, Sep 2026
46
Gilgamesh Pharmaceuticals, a Clinical stage biotechnology company…
S2037+3%+3%0$143MSeries A$60M, Mar 2026
47
The data layer for physical AI
W21231+31%+75%3$110MSeries C$60M, Feb 2026
48
AI-native Employee Management Platform for High-Growth Companies
W2387+61%+200%11$85MSeries B$60M, Jun 2026
49
Protecting the grid today, preparing the grid for tomorrow
W21221+18%+51%1$97.2MSeries B$55M, Nov 2025
50
AI-enabled financial automation and intelligence for CPG Brands
S21121+89%+163%22$75MSeries B$55M, Sep 2026
51
Online Training for Healthcare Jobs
S21449+12%+33%36$111MSeries C$55M, Jun 2026
52
Construction's AI Platform
W22175+40%+84%4$90.5MSeries B$54M, Dec 2025
53
Fair, simple and accessible financial services
S21480+4%+15%2$86.8MCorporate round$53M, May 2026
54
Medical device that provides a more effective, less invasive…
W1548+12%+41%1$134MSeries D$52M, Oct 2026
55
AI-powered technology enabler and digital transformer of American…
W15129+7%+11%0$599MSeries H$50M, Feb 2026
56
The sleep fitness company.
S15282+17%+26%16$302MSeries D$50M, Mar 2026
57
Household needs, from bread to everything.
S192,667+7%+21%0$89MSeries C$50M, Feb 2026
58
Voice AI for developers.
W21150+50%+114%4$70.6MSeries B$50M, May 2026
59
The enterprise platform for AI phone calls
S23123+4%+38%5$106MSeries C$50M, Jun 2026
60
The multiplayer AI agent builder. Let anyone build, IT controls access
W2451+28%+122%8$70.1MSeries B$50M, Mar 2026
61
The agentic operating system for legal work
W24980+81%+321%123$866MSeries D$50M, Apr 2026
62
AI code review agent with complete context of your codebase
W2445+61%+125%16$80.3MSeries B$50M, Aug 2026
63
Practical, general-purpose robots for repetitive industrial tasks
S2438+100%+192%YC$62MSeries A$50M, Oct 2026
64
Growth through always‑on consumer understanding
S24103+54%+472%9$55.8MSeries A$50M, Sep 2026
65
We build the AI companion for nurses, to create time for care.
W22192+42%+109%11$59.3MSeries A$49.8M, Nov 2025
66
AI-native commercial insurance brokerage
W2585+35%+158%14$47.5MSeries A$47M, Feb 2026
67
Expo brings together the best of web and native app development
S16205+17%+41%0$45.1MSeries B$45M, Apr 2026
68
The intelligent documentation platform
W2285+29%+81%12$66.7MSeries B$45M, Apr 2026
69
Making all ships robots.
W2240+5%+33%3$58.5MSeries A$43M, Jan 2026
70
Modernizing commercial insurance
W21107+11%+43%17$61.6MSeries B$42M, Mar 2026
71
Infrastructure to protect companies from AI abuse
W2260+54%+107%4$55MSeries B$41M, May 2026
72
Connecting stakeholders across the healthcare ecosystem.
W20585+8%+12%22$234MSeries D$40M, May 2026
73
Pre-tax and lifestyle benefits, managed in one place.
W20135+25%+67%7$74.7MSeries B$40M, Jan 2026
74
all-in-one operating system (OS) for telcos
W21121+34%+51%8$66.3MSeries B$40M, Mar 2026
75
Internet for the urban developing world.
W21382+18%+41%0$75.6MSeries B$40M, Mar 2026
76
Payments powering people
S2168−1%+8%5$62MSeries B$40M, Jun 2026
77
Building the human layer of AI
S21104+4%+33%8$64.2MSeries B$40M, Nov 2025
78
We're building fully automated labs for protein engineering
S2140+29%+43%YC$50.9MSeries A$40M, Aug 2026
79
Spade is the data and AI platform for modern finance.
W2246+39%+77%6$57.2MSeries B$40M, Mar 2026
80
AI patent drafting, prosecution, litigation and more for legal teams.
S2372+33%+125%3$55MSeries B$40M, Dec 2025
81
End-to-end content, learning, & deal intelligence for B2B sales teams
S2368+45%+183%YC$55MSeries B$40M, Feb 2026
82
AI that makes AI fast
S2518+200% 2$44.8MSeries A$40M, Sep 2026
83
Luminai is the AI platform for Health System Operations.
S2069+25%+50%4$57.8MSeries B$38M, Apr 2026
84
Altay develops disease-modifying therapies targeting transcription…
W207+17%+40%0$40.2MSeries A$37M, Oct 2026
85
Glimpse is the system of action for CPG retail operations
S2070+37%+75%3$53.4MSeries A$35M, Mar 2026
86
Turning everyday words and actions into usable training data.
W26100−5%+488%0$31.7MSeed$31.2M, May 2026
87
AI for corporate tax
W23106+49%+74%1$43.5MSeries B$31M, Feb 2026
88
Transforming how health systems optimize labor
W2374+19%+85%12$31MSeries A$31M, Oct 2026
89
1st federally regulated exchange where people can trade on events
W19604+17%+83%YC$2.9BUndisclosed round$30M, Jul 2026
90
Natural hydrogel to keep internal organs scar-free after surgery
W2225+47%+178%0$32.3MSeries A$30M, Jul 2026
91
AI platform to win and run government contracts
W2272+14%+47%YC$40MSeries B$30M, Jan 2026
92
AI Phone Agents for Healthcare Operations
S2370+100%+400%4$35MSeries A$30M, Jun 2026
93
The World's First Multi-Agent System for Procurement
S23149+22%+192%6$30MSeries A$30M, Mar 2026
94
AI-powered user interviews
S23113+43%+232%25$51.3MSeries B$30M, Dec 2025
95
Applied research lab curating data solutions for foundation model…
W25286+58%+186%25$30.5MSeries B$30M, Sep 2026
96
Data and RL environments to automate knowledge work
S2555  2$30.5MSeries A$30M, Oct 2026
97
Making AI run fast on any hardware.
S2513+18%+44%YC$35MUndisclosed round$29.2M, Oct 2026
98
Enabling better self care with at-home hormone tracking.
W19264+6%+10%YC$57.5MSeries B$29M, Dec 2025
99
Autonomous Company Infrastructure
X2515+150%+200%3$28.5MSeries A$28.5M, Aug 2026
100
On-Demand Electronics Manufacturing
W1266+14%+32%8$46.4MSeries A$28M, May 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 people ask about YC companies

How many companies has Y Combinator funded?

YC's public directory lists 6,376 launched companies across 50 batches since 2005: 4,406 active, 839 acquired, 23 public and 1,108 listed as inactive.

What is the latest YC batch?

The newest batch with companies in the directory is Fall 2026 (219 companies). YC has also started listing Summer 2027 (1) and Winter 2027 (9). YC runs four batches a year: Winter, Spring, Summer and Fall.

What are the biggest YC companies?

By people listing them as their employer on public profiles (which can include contractors, drivers and hosts): DoorDash (84,144), Instacart (25,483), Stripe (16,694), Rappi (15,009) and Deel (9,642). 23 YC companies are public and 839 were acquired. Sort the table by Largest team to see the rest.

Which YC companies are hiring?

We found job postings in the last 60 days for 719 YC companies, led by Stripe (659 roles), EquipmentShare (262 roles) and Relativity Space (244 roles); another 1,017 say they are hiring on YC's directory. See YC companies hiring the most, or filter by Hiring for (engineering, sales and more). We count distinct role titles, because the same job is often posted on several job boards.

Which YC companies are growing fastest?

Ranked by team growth over the last 6 months, among active companies with 10 or more people: Human Archive (+579%), Freya (+355%) and Linewise (+331%). See the fastest growing YC companies, or open any batch and pick Fastest growing.

How is team size counted?

Team is the number of people who list the company as their current employer on public professional profiles, counted by Crustdata every month. It can differ from a company's own number (contractors, people who have not updated their profile). The 6 and 12 month changes compare that count with the same count back then, and we only show a change when the team had at least 5 people at the start.

Which YC companies failed or shut down?

1,108 companies are listed as inactive in YC's directory, which usually means they shut down or stopped operating. Filter the table by Status, Inactive to see them. YC does not publish why a company became inactive, and some inactive companies were acqui-hired.

How do I get the list of YC companies as a CSV?

Use Export CSV above the table. It downloads whatever you are looking at (a batch, a list, your filters and search) with domain, batch, status, team size and change, open roles, funding, investors and founders with their profile links. It asks for your email once; we never send anything to it.

Where does this data come from?

The list of companies, batches, industries and locations comes from Y Combinator's public directory, via the open yc-oss dataset. Team size and growth, open roles, funding and founders come from the Crustdata API, which tracks 60M+ companies and 1B+ public professional profiles, and job postings. Each company is matched by its website and its name; 945 companies have no Crustdata record yet and show YC's data only. Funding is reported funding (including debt in the total) and can be incomplete.

How often is it updated?

Every week. The last update was on November 9, 2026. Founders are refreshed monthly. New companies appear the week YC adds them to its directory.

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