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YC companies founded by ex-Microsoft people

258 Y Combinator companies with a founder who worked at Microsoft before.

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

Hiring the mostlast 60 days
192 roles
RipplingW17
  1. 2Razorpay17
  2. 3Eight Sleep16
See all 37
Fastest growingteam, 6 months
+194%
HubX26
  1. 2Amera+120%
  2. 3Shadeform+110%
See all 67
Shrinkingteam, 12 months
−43%
KularW22
  1. 2Reforged Labs−39%
  2. 3Pulley−31%
See all 12
Raised the mostlast 12 months
$250M
StarcloudS24
  1. 2Eight Sleep$50M
  2. 3Gumloop$50M
See all 16
Companies
258
Active
180
Hiring, last 60 days
37
Open roles, 60 days
370
People on these teams
21,984
Showing 50 of 258 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
One place to run all your HR, IT, and Finance. Globally.
W177,889+5%+23%192$2.4BSeries G$450M, May 2025
India's only full-stack financial solutions company for businesses.
W154,038−1%−2%17$817MSecondary$75M, May 2022
Manage your ledgers and avail Financial Services like Lending on your…
S18893+7%+12%0$187MSeries C$100M, Aug 2021
Inspection software for renewable energy & sustainable infrastructure
W15706+2%+1%1$174MUndisclosed round$60M, Mar 2025
The cloud-native, operational database built for speed and scale.
W11565+3%+2%14$464MSeries F$30M, Oct 2022
The platform for all your life events.
S16503+2%+8%YC$107MSeries B$60M, Nov 2022
Lob is the only automation platform that transforms direct mail into…
S13440+8%+14%3$82.3MSeries C$50M, Feb 2021
Global Business Banking for Africa's Ambitious Businesses.
W17423+1%−2%0$50.7MDebt$3M, Sep 2026
Accounting, Payments & Credit app for 60M micro-businesses in…
S20367+14%+31%0$80MSeries A$60M, Jun 2021
Agentic AI CRM for ecommerce
S20353+3%+8%1$12.8MUndisclosed round$10.8M, Apr 2022
Marketplace for graphic design assets
W10Acquired341−2%−1%0$11.7MSeries A$7M, Oct 2017
The sleep fitness company.
S15282+17%+26%16$302MSeries D$50M, Mar 2026
Nabis is the largest licensed cannabis wholesale platform.
W19264+15%+27%6$59MDebt$4M, Jan 2026
Private sector Healthcare.gov.
S12255+2%+3%2$6.6MUndisclosed round$6.6M, Feb 2017
Secure Collaboration for Technical Teams
S12169+5%+8%8$73.5MSeries B$50M, Jun 2019
India's Telemedicine Platform & Online Pharmacy for Dermatology Care
S22162+5%+22%YC$3.2MSeed$2.6M, Sep 2023
AI company transforming enterprise physical security to prevent…
W17157+1%+8%3$72.1MUndisclosed round$20M, Oct 2023
Neema is an app for unbanked workers, which provides a checking…
W17Inactive143+3%+13%0$19.3MUndisclosed round$17.7M, Dec 2021
Self-Checkout using Computer Vision.
W15130+8%+13%YC$73.7MSeries B$62.5M, May 2022
The AI Command Center for outbound and ABM
S14108+5%+2%1$22.4MSeries A$20M, Oct 2021
We setup Immigrants with a free US Bank Account, Credit Card, SIM…
S1996−1% YC$2.3MUndisclosed round$2.3M, Jan 2023
Glide turns spreadsheets into beautiful, intelligent apps.
W1995−9%−12%1$23.8MSeries A$20M, Apr 2022
24/7 pediatric clinic in every family's living room
W1883+4%+9%3$7.7MSeed$4M, Jan 2022
AI Workforce for the Insurance Industry
W2471+42%+209%5$30MSeries A$25M, Oct 2025
Automating non-emergency calls for 911 centers
S2269+30%+123%6$14.5MSeries A$14M, Aug 2025
We're crowdsourced Gartner so IT executives can learn directly from…
W18Acquired69+13%+21%0$10.6MSeries A$6.5M, Apr 2020
Data centers in space
S2466+57%+128%YC$444MSeries A$250M, Aug 2026
Pulley helps founders and finance teams manage their equity and cap…
W2063−43%−31%1$50.1MSeries B$40M, Jul 2022
AI hiring platform powered by expert recruiters
W2562+13%+130%0$2.8MSeed$2.3M, May 2026
Payroll, benefits, state compliance & other bullsh*t for startups
S24Acquired62−2%−17%0$9.1MSeed$8.6M, Aug 2025
AI lipsync tool for video content creators
W2461+42%+56%0$6.4MGrant$250K, Oct 2024
Longevity for the 99%.
W2261+11%+205%1SeedJan 2023
Build better banking
S1758+38%+32%9$4MUndisclosed round$2M, Mar 2022
Platform for unique products produced on-demand at mass-scale
S17Acquired55−5%−7%0$5.5MNon-equity support$4.2M, Sep 2022
Real-world training data for frontier AI labs and robotics.
X2653+194%+152%YC
The multiplayer AI agent builder. Let anyone build, IT controls access
W2451+28%+122%8$70.1MSeries B$50M, Mar 2026
Recover from any outage in 10 minutes or less.
W2151+46%+65%0$26.2MSeries A$15.9M, Jun 2026
The multimodal data lab
W2250+52%+178%12$4.1MSeed$4M, Nov 2022
Open source alternative to DataDog
W2146−8%−2%3$6.5MSeed$5.4M, Sep 2023
Financial data layer for AI-powered finance and accounting
S2041−11%−5%YC$10.1MSeries A$10M, Apr 2025
Subscription service for women's apparel & accessories.
S13Inactive410%0%0$72MSeries C$9.5M, Nov 2017
Autonomous medical care
S2140+18%+60%15$7.6MSeed$5.6M, Jan 2026
Streak transforms Gmail into a powerful CRM
S1140+5%+5%YC$1.9MSeed$1.9M, Oct 2012
Turbotax for México and LATAM
S2139−5% 0$2.9MSeed$2.6M, Feb 2022
The freshest data APIs for AI sales, recruiting, & growth products
S23380%+3%0$4.3MSeed$4.3M, Jan 2024
Mobile marketing analytics and infrastructure
S14Acquired37+3%+3%0$2.5MSeed$2.5M, Jun 2016
AI-powered care for seniors with chronic disease
W2335+3%+40%6$500KYC investment$500K, Mar 2023
Pinduoduo for India
S21Inactive350%0%0$3MYC investment$125K, Dec 2021
MySivi - AI English Speaking Practice App
W2233 +106%0SeedNov 2024
Trust Center platform that scales customer security reviews
S20Acquired33−13%−35%0$53.1MSeries B$33M, 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-Microsoft founded YC companies

How many ex-Microsoft founded YC companies are there?

258 Y Combinator companies have a founder who worked at Microsoft; 180 are active.

Which ex-Microsoft founded YC companies are hiring?

37 companies posted roles in the last 60 days, led by Rippling (192 roles), Razorpay (17 roles) and Eight Sleep (16 roles). 78 mark themselves as hiring on YC's directory.

Which ex-Microsoft founded YC companies are growing fastest?

By team growth over 6 months (10+ people): Hub (+194%), Amera (+120%) and Shadeform (+110%).

Which ex-Microsoft founded YC companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Starcloud ($250M), Eight Sleep ($50M) and Gumloop ($50M).

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