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YC companies founded by ex-The D. E. Shaw Group people

11 Y Combinator companies with a founder who worked at The D. E. Shaw Group before.

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

Hiring the mostlast 60 days
2 roles
PulseS24
  1. 2SyntheticFi1
See all 2
Fastest growingteam, 6 months
+73%
SyntheticFiS23
  1. 2Pulse+31%
  2. 3Flint+19%
See all 4
Raised the mostlast 12 months
$7M
Pibit.aiW21
  1. 2SyntheticFi$500K
See all 2
Companies
11
Active
7
Hiring, last 60 days
2
Open roles, 60 days
3
People on these teams
1,391
Showing 11 of 11 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
Music Intelligence
S11Acquired839+5%+12%0$77.7MUndisclosed round$5.8M, Sep 2020
HR for small businesses: onboarding, payroll and benefits.
W13Acquired214−5%−9%0$584MUndisclosed round$500M, Oct 2021
The AI Underwriting OS for Commercial, Specialty & E&S insurance
W21167+7%+37%0$7.7MSeries A$7M, Nov 2025
Production-grade unstructured document extraction
S2446+31%+53%2$4.4MSeed$3.9M, Feb 2025
Personalized learning built for schools
S2337+19%+76%YC$15.5MSeries ANov 2025
The cheapest way to borrow money
S2326+73%+225%1$500KSeed$500K, Jun 2026
Open-Core Pricing and Billing Engine
S22Inactive220%0%0SeedOct 2022
Modern customer support platform replacement for Intercom and Zendesk
W22Inactive19−14%−34%0$3.4MSeed$3.4M, Mar 2022
The programming language for AI
W238−33% YCSeedJan 2025
AI coworkers for fraud and compliance teams.
S257+17% YC$4MSeed$4M, Sep 2025
AI-Powered Optical Consulting & Software
X256+20% YC$500KYC investment$500K, Jun 2025

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-The D. E. Shaw Group founded YC companies

How many ex-The D. E. Shaw Group founded YC companies are there?

11 Y Combinator companies have a founder who worked at The D. E. Shaw Group; 7 are active.

Which ex-The D. E. Shaw Group founded YC companies are hiring?

2 companies posted roles in the last 60 days, led by Pulse (2 roles) and SyntheticFi (1 roles). 6 mark themselves as hiring on YC's directory.

Which ex-The D. E. Shaw Group founded YC companies are growing fastest?

By team growth over 6 months (10+ people): SyntheticFi (+73%), Pulse (+31%) and Flint (+19%).

Which ex-The D. E. Shaw Group founded YC companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Pibit.ai ($7M) and SyntheticFi ($500K).

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