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YC companies in San Diego

19 Y Combinator companies based in San Diego, 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
7 roles
RecoverW21
See all 1
Fastest growingteam, 6 months
+18%
RecoverW21
  1. 2Sourcify+8%
  2. 3VedaBio+8%
See all 4
Shrinkingteam, 12 months
−18%
MedCryptW19
See all 1
Companies
19
Active
15
Hiring, last 60 days
1
Open roles, 60 days
7
People on these teams
328
Showing 19 of 19 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
Modern, on-demand lawn care service. Get a quote in two minutes.
S14Acquired152+2%+3%0$1.9MSeed$1.9M, Apr 2017
Government-funded online addiction treatment
W2145+18%+41%7SeedMar 2021
MedCrypt gives medical device vendors cybersecurity features in a few…
W1928 −18%0$42.7MDebt$8.3M, Feb 2025
CRISPR powered Diagnostics with results in minutes.
S2127+8%+8%0$65MSeries A$25M, Sep 2025
Fermentation-derived natural products to solve health problems
S1815+7%+7%0$7.6MUndisclosed round$7.5M, Oct 2022
Sourcify helps brands manufacture products in Asia.
W1813+8%+30%YC$4.9MConvertible note$2.5M, Mar 2018
Powering tomorrow's industrial revolution in space
F2511  0$500KYC investment$500K, Dec 2025
Oral drugs to halt neurodegeneration
W227+40%+40%0Undisclosed roundMar 2022
LinkedIn content consultancy and scheduling platform for busy founders
W216  0$125KYC investment$125K, Mar 2021
Bioengineered kidneys for patients with kidney failure
W215−17%−17%0$1MGrant$1M, Jun 2023
The social app for edge-of-culture communities
W205  0$2.5MSeed$2.5M, Sep 2022
Collaborative data noteboook for business teams
S19Acquired4  0$150KYC investment$150K, Aug 2019
ML to predict and prevent pregnancy complications
S233  0$593KYC investment$30K, Jul 2023
High quality mRNA for therapeutic application
S223  0$500KYC investment$500K, Aug 2022
Drop-in Direct Billing SDK for In-App Purchases
W262  0$500KYC investment$500K, Mar 2026
Faster processors for solving NP-complete problems
S222  0$2.4MSeed$1.9M, Jun 2025
Beautifully designed banking for high net-worth individuals.
S20Inactive  0$125KYC investment$125K, Aug 2020
We are using the gut microbiome to end cancer.
W18  
The easiest way to learn about, buy, and store cryptocurrency.
W18Inactive  0$120KYC investment$120K, Jan 2018

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 San Diego YC companies

How many San Diego YC companies are there?

19 Y Combinator companies are based in San Diego; 15 are active.

Which San Diego YC companies are hiring?

1 companies posted roles in the last 60 days, led by Recover (7 roles). 1 mark themselves as hiring on YC's directory.

Which San Diego YC companies are growing fastest?

By team growth over 6 months (10+ people): Recover (+18%), Sourcify (+8%) and VedaBio (+8%).

Which San Diego YC companies raised the most?

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

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