CrustdataGet an API key

YC companies founded by ex-Jane Street people

27 Y Combinator companies with a founder who worked at Jane Street before.

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

Hiring the mostlast 60 days
9 roles
PointOneW24
  1. 2Novig9
See all 2
Fastest growingteam, 6 months
+100%
PointOneW24
  1. 2Novig+72%
  2. 3Miyagi Labs+67%
See all 4
Raised the mostlast 12 months
$75M
NovigS22
  1. 2PointOne$16M
  2. 3Copperlane$4.1M
See all 3
Companies
27
Active
23
Hiring, last 60 days
2
Open roles, 60 days
18
People on these teams
284
Showing 27 of 27 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
America's #1 Sports Trading App
S2298+72%+165%9$99.9MSeries B$75M, Feb 2026
AI Time Platform for Law Firms
W2442+100%+320%9$19.6MSeries A$16M, Mar 2026
Py is democratizing access to career opportunities in tech
S17Acquired38−3%−3%0$120KYC investment$120K, Aug 2017
Modernizing the police workflow.
X2517−26%+31%YC$2.7MSeed$2.7M, Jun 2025
Tinder for jobs
F2515+7% 0$500KYC investment$500K, Dec 2025
AI tutors for exam prep
W2510+67% YC$500KYC investment$500K, Mar 2025
Trade Anything
F259+29%+80%0$2.5MSeed$2M, Nov 2025
Modular AI-Commanded Drones for Defence
W267  YC$500KYC investment$500K, Apr 2026
Intelligent Medical Record Reviews
W247−12%−12%0$500KYC investment$500K, Apr 2024
Agentic Mortgage Origination
W264  YC$4.6MSeed$4.1M, Jun 2026
Powerful quantitative forecasting models
S244 −33%0
Engineering next-generation, brain-penetrant cancer therapies.
W18Inactive4  0$25MSeries A$25M, Feb 2021
Predictive maintenance for power infrastructure.
F263  0
Physics-based foundation models for CAD optimization.
S253  0$500KYC investment$500K, Sep 2025
AI travel planner
S243  YC$500KYC investment$500K, Dec 2025
The customer brain that connects data to explain customer behavior
S262  0
We are a multi-strategy trading firm that trains AI traders.
S262  0
Helping your company find 10x engineers.
X262  0
Trade with superhuman instinct
W262  0
Agents for quantitative research and financial data science.
S242  0
Helping Companies Deploy Email Agents in High Trust Domains
W242  0
Custom video detection models in less than 5 minutes
W242  0$500KYC investment$500K, Mar 2024
Learn language with real-world content, at your level
S232  0Pre-seedOct 2023
AI-Native Medical Billing Services
W261  0$500KYC investment$500K, Mar 2026
Fast and Safe OpenClaw on the cloud
W26Inactive1  0
Grammarly for Math ✏️
X251  0$500KYC investment$500K, Jun 2025
AI search for massive PDFs
W24Inactive1  0$500KYC investment$500K, Apr 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 ex-Jane Street founded YC companies

How many ex-Jane Street founded YC companies are there?

27 Y Combinator companies have a founder who worked at Jane Street; 23 are active.

Which ex-Jane Street founded YC companies are hiring?

2 companies posted roles in the last 60 days, led by PointOne (9 roles) and Novig (9 roles). 7 mark themselves as hiring on YC's directory.

Which ex-Jane Street founded YC companies are growing fastest?

By team growth over 6 months (10+ people): PointOne (+100%), Novig (+72%) and Miyagi Labs (+67%).

Which ex-Jane Street founded YC companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Novig ($75M), PointOne ($16M) and Copperlane ($4.1M).

Browse YC companies

By batch

Show fewer

By industry

Show fewer

By location

Show fewer

By founders' past employer

Show fewer