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YC S10 companies (Summer 2010)

All 36 companies in Y Combinator's Summer 2010 batch, with team size, growth, open roles and funding.

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

Hiring the mostlast 60 days
38 roles
DockerS10
  1. 2PagerDuty21
  2. 3inDinero2
See all 4
Fastest growingteam, 6 months
+7%
DockerS10
  1. 2DemandSphere+5%
  2. 3Presto+3%
See all 3
Shrinkingteam, 12 months
−6%
inDineroS10
Companies
36
Active
6
Hiring, last 60 days
4
Open roles, 60 days
62
People on these teams
3,311
Showing 36 of 36 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
Software development platform.
1,108+7%+20%38$436MSeries C$105M, Mar 2022
Digital meets physical for big chain restaurants
358+3%+4%1$214MUndisclosed round$10M, Sep 2026
Financial dashboard for businesses.
162−2%−6%2$9.9MUndisclosed round$7M, Jan 2021
platform for home service professionals
158−1%+1%0$64.2MSeries B$38M, Dec 2013
SEO & Content Marketing Intelligence
21+5%+5%0$1.7MSeed$1.3M, Oct 2011
Disposable social networks.
11+10%+10%0$80KYC investment$80K, Aug 2010
WorkFlowy is a better way to manage information. It provides a simple…
90%−10%0SeedApr 2017
Hipmunk takes the agony out of searching for flights, accommodations,…
80%0%0$55MUndisclosed round$5.7M, Apr 2016
Chartio is changing how companies work by building the best…
60%0%0$6.8MUndisclosed round$2.2M, Jan 2014
The online financial management service for everyone.
60%0%0$21.5MSeries B$15.5M, May 2014
Add profiles to email.
50%0%0$1MSeed$1M, Aug 2010
Memorial sites.
3  0$2.5MSeries A$2.5M, Feb 2011
Crowdsourced design marketplace for paper goods.
2  0$1.1MSeries A$1.1M, Apr 2011
Business dashboards
2  0$500KYC investment$500K, Nov 2010
Secure Enterprise Collaboration.
1  0$15.5MSeries B$10M, Jul 2015
Friends motivate one another: I'll do x if you do y.
1  0$745KDebt$495K, Feb 2012
Personal debt and credit management. Acquired by Avant in 2015.
1  0$4.8MSeries A$4.5M, Jun 2011
Real-time visibility into critical apps and services all in one place.
1,374  21$524MPost-IPO debt$350M, Oct 2023
The retreat where curious programmers recharge and grow
75  0$217KSeed$200K, Jan 2012
Teevox
  
Simplenote (simplenote.com) and the Simperium platform for syncing…
  0SeedAug 2010
Map-based apartment search.
  0Undisclosed roundAug 2010
One app for stress-free shopping, cooking, and meal planning.
  
iPad drawing software.
  
Better Microsoft Project.
  
Eyetracking using webcams.
  0SeedJun 2010
Upbeat: Building the next generation of Public Relations (PR)
  
Q&A for businesses.
  
New email inbox.
  
Local chat.
  
  
Woot for iOS apps.
  
Location-aware smartphone application that enables parents to keep…
  
Easy SEM software. Acquired by Twitter in 2011.
  
Like Twitter but you post others' status.
  
iPad games.
  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 YC S10 companies

How many YC S10 companies are there?

36 companies were in Y Combinator's Summer 2010 batch (S10); 6 are active.

Which YC S10 companies are hiring?

4 companies posted roles in the last 60 days, led by Docker (38 roles), PagerDuty (21 roles) and inDinero (2 roles).

Which YC S10 companies are growing fastest?

By team growth over 6 months (10+ people): Docker (+7%), DemandSphere (+5%) and Presto (+3%).

Which YC S10 companies raised the most?

No reported rounds after their YC batch in the last 12 months.

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