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YC companies founded by ex-IBM people

87 Y Combinator companies with a founder who worked at IBM before.

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

Hiring the mostlast 60 days
23 roles
AjaibS18
  1. 2Netomi14
  2. 3Sygaldry Technologies8
See all 13
Fastest growingteam, 6 months
+167%
KarumiF25
  1. 2Haven+83%
  2. 3Artisan+75%
See all 25
Shrinkingteam, 12 months
−38%
MoonvalleyW21
  1. 2Reclaim Protocol−19%
  2. 3Avocademy−14%
See all 5
Raised the mostlast 12 months
$270M
AjaibS18
  1. 2Netomi$110M
  2. 3Sygaldry Technologies$105M
See all 6
Companies
87
Active
66
Hiring, last 60 days
14
Open roles, 60 days
123
People on these teams
7,707
Showing 50 of 87 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
Change the world to value skills over pedigree
S112,231+4%+14%3$103MSeries D$60M, Mar 2022
Consumer fintech for Indonesia
S18939+2%+15%23$515MSeries C$270M, Aug 2026
All-in-one recruiting platform that empowers hiring excellence in…
W19580+31%+73%56$120MSeries D$50M, Jul 2025
Online pets supplies for Latin America with over 4000 products & 20…
S19393+4%+2%0$65MSecondary$48M, May 2023
AI employees that take on real work, starting with sales
W24342+75%+4,786%2$46.1MSeries A$25M, Apr 2025
Self-Driving Customer Care
W16310+16%+34%14$217MSeries C$110M, Apr 2026
Building the next generation AI creative studio
W2194−13%−38%YC$154MSeed$84M, Jul 2025
AI-native on-call and incident response carefully crafted to help…
S2193+22%+27%1$15.2MSeries A$12M, Aug 2023
Modern user-focused observability built on OpenTelemetry
S19Acquired93−28%−26%0$77MUndisclosed round$20M, Jul 2023
Flexible On-Demand Storage Space for Household, SMEs & Travellers.
S2185+12%+20%0$630KSeed$505K, Dec 2021
Staff management software for retail, manufacturing and hospitality
S19Inactive66+8%+27%0$230KYC investment$150K, Aug 2019
Platform for unique products produced on-demand at mass-scale
S17Acquired55−5%−7%0$5.5MNon-equity support$4.2M, Sep 2022
The one-stop-shop for auto-parts in Mexico.
W2153+43%+66%0$5.5MSeed$3M, Jan 2023
Online marketplace for team retreat venues
W2251+46%+65%1$3.2MSeed$2.2M, Sep 2024
quantum-accelerated AI servers
X2548+50%+118%8$139MSeries A$105M, Mar 2026
Sustainable period care.
S1644+2% 0$7.7MUndisclosed round$3.6M, Apr 2020
The fastest way to ship airtight AI
S2133+3%+43%0$19.3MSeries A$14.5M, May 2025
Building a compensation graph to help companies optimise people spend
S2231−3%−3%0$500KYC investment$500K, Sep 2022
We teach UX/UI design and then help people get great jobs.
W2231−3%−14%0SeedApr 2022
Validated mental health support in your pocket, anytime.
W2426+30%+53%YCSeedMar 2024
LATAM’s largest stablecoin FX and liquidity provider
S2224+4%+50%0SeedJun 2023
Saving OPS from SLOPS. Jestor builds internal systems that last.
S2123+10%+44%0$345KYC investment$345K, Aug 2021
Code review for DevOps tasks
W2123+10%+44%0SeedOct 2025
Education, Employment, Loyalty verification. Global & Compliant.
W2121−12%−19%0
AI for Government Contractors
W2320+11%+33%2$2.5MSeed$2.5M, Mar 2025
Predictive analytics and clinical pathways for hospitals
S11200%+11%0$2MSeed$2M, Jun 2012
Real-time Nielsen ratings for Brands.Accelerate marketing and product…
W1519−5%−5%0SeedMar 2015
Tools for AI agents to run marketing for the world's biggest…
W2418+29%+125%YC$500KYC investment$500K, Apr 2024
US based USD accounts for non-US residents
W2217+6%−11%0$17.3MSeed$5M, Jun 2024
The Waymo of Personalized demos
F2516+167% YCSeedDec 2025
AI voice and texting agents
W2516+7%+60%1$5.2MSeed$4.7M, Mar 2025
The intelligence and execution layer for agentic B2B card payments.
S22140%+17%0SeedJan 2023
Fully autonomous defense solutions for the global edge.
W2214+40%+40%0$3.3MSeed$2.2M, Oct 2023
Next-generation, modular electric vehicles
W2213−7%−13%YC$2.2MEquity crowdfunding$892K, Sep 2026
Accelerate development by simulating production conditions with real…
S2012−20%−20%0$12.8MSeed$9M, Mar 2023
Intelligence for Automotive Operations
W2611  YC$500KYC investment$500K, Mar 2026
AI workforce for property management
W2311+83%+120%YC$500KYC investment$500K, Apr 2023
Plena is the AI operating system for specialty medical practices
X2610+67%+67%YC$500KYC investment$500K, Jun 2026
AI for Pharma Intelligence
W2410−17%−9%3$11.5MSeed$5.5M, Jul 2025
Automated AI data integrations for roll-ups
S248+60%+60%YC$500KYC investment$500K, Jan 2026
Freight bill audits, AP, AR automation for freight brokers with…
S248+33%+33%YC$500KYC investment$500K, Feb 2025
PaaS-like experience with the power of Kubernetes, on your cloud
W238−11%+14%0$500KYC investment$500K, Apr 2023
Agentic Payments for APIs
W266  YC$4.8MSeed$4.3M, Jun 2026
Protect and Grow Long-tail Revenue
W2560%−25%0$500KYC investment$500K, Mar 2025
Collaborative workspace for internal tools and agents
W236  0$500KYC investment$500K, Apr 2023
Chartio is changing how companies work by building the best…
S10Acquired60%0%0$6.8MUndisclosed round$2.2M, Jan 2014
Making Defense Manufacturing Faster and Cheaper
S265  YC
Submarine drones for defense
X265  0$500KYC investment$500K, Jun 2026
A Foundation Model for Microbial Communities.
F255  0$500KYC investment$500K, Dec 2025
Banking designed for Indian couples.
S2250%0%0

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-IBM founded YC companies

How many ex-IBM founded YC companies are there?

87 Y Combinator companies have a founder who worked at IBM; 66 are active.

Which ex-IBM founded YC companies are hiring?

14 companies posted roles in the last 60 days, led by Ajaib (23 roles), Netomi (14 roles) and Sygaldry Technologies (8 roles). 23 mark themselves as hiring on YC's directory.

Which ex-IBM founded YC companies are growing fastest?

By team growth over 6 months (10+ people): Karumi (+167%), Haven (+83%) and Artisan (+75%).

Which ex-IBM founded YC companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Ajaib ($270M), Netomi ($110M) and Sygaldry Technologies ($105M).

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