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W25 companies that raised the most in the last 12 months

The 19 YC W25 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 19 of 19 companies on this list
#CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
1
AI-native commercial insurance brokerage
85+35%+158%14$47.5MSeries A$47M, Feb 2026
2
Applied research lab curating data solutions for foundation model…
286+58%+186%25$30.5MSeries B$30M, Sep 2026
3
AI agents for CX teams, starting with training and QA.
43+48%+187%2$32.7MSeries A$25M, Apr 2026
4
The Javascript framework for building AI agents, from the Gatsby devs
62+19%+44%0$35MSeries A$22M, Apr 2026
5
AI-native ATS/CRM for recruiting firms
47+96%+327%2$24.2MSeries A$21M, Sep 2026
6
The data layer for perceptual intelligence
44+300%+450%2$24MSeries A$20M, Aug 2026
7
Pending CFTC regulation to be the first cash and physically settled…
13  YC$15MSeed$15M, Sep 2026
8
Platform and marketplace for RL environments and AI data
16+7%+23%YC$16.2MSeries A$14M, Jun 2026
9
AI to understand and then route engineering work
25+32%+127%2$18.2MSeries A$13.5M, Jul 2026
10
Making humanoids dexterous enough to thread a needle
17+42%+31%YC$11MSeed$11M, Jun 2026
11
Reusable Satellites
10−41%−41%YC$7.1MSeed$7.1M, Dec 2025
12
Query mission-critical video
22+29%+69%0$14.4MSeed$7M, Mar 2026
13
Discovering new pesticides with AI
4−33% 0$6.5MSeed$6M, Nov 2025
14
Fusion reactors for ships
2  YC$5MSeed$4.5M, Nov 2025
15
Autonomous patrol-boats for National Security
10+25%+43%YC$4.7MSeed$4.2M, Jul 2026
16
Ergo is the context layer that helps revenue teams close more deals.
11+57%+83%YC$3.3MSeed$2.8M, Jun 2026
17
AI hiring platform powered by expert recruiters
62+13%+130%0$2.8MSeed$2.3M, May 2026
18
AI quote & order processing for technical distributors & manufacturers
24+14%+4%YC$2.6MSeed$2.1M, Dec 2025
19
AI Accountant for Accounting Firms
16+45%+129%YC$1.5MSeed$1M, Mar 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 W25 companies

How many YC W25 companies are there?

166 companies were in Y Combinator's Winter 2025 batch (W25); 159 are active.

Which YC W25 companies are hiring?

15 companies posted roles in the last 60 days, led by AfterQuery (25 roles), Harper (14 roles) and SalesPatriot (3 roles). 66 mark themselves as hiring on YC's directory.

Which YC W25 companies are growing fastest?

By team growth over 6 months (10+ people): Mundo AI (+300%), Mosaic (+117%) and Spott (+96%).

Which YC W25 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Harper ($47M), AfterQuery ($30M) and Solidroad ($25M).

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