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.
| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Modern, on-demand lawn care service. Get a quote in two minutes. | S14Acquired | 152 | +2% | +3% | 0 | $1.9M | Seed$1.9M, Apr 2017 |
Government-funded online addiction treatment | W21 | 45 | +18% | +41% | 7 | SeedMar 2021 | |
MedCrypt gives medical device vendors cybersecurity features in a few… | W19 | 28 | −18% | 0 | $42.7M | Debt$8.3M, Feb 2025 | |
CRISPR powered Diagnostics with results in minutes. | S21 | 27 | +8% | +8% | 0 | $65M | Series A$25M, Sep 2025 |
Fermentation-derived natural products to solve health problems | S18 | 15 | +7% | +7% | 0 | $7.6M | Undisclosed round$7.5M, Oct 2022 |
Sourcify helps brands manufacture products in Asia. | W18 | 13 | +8% | +30% | YC | $4.9M | Convertible note$2.5M, Mar 2018 |
Powering tomorrow's industrial revolution in space | F25 | 11 | 0 | $500K | YC investment$500K, Dec 2025 | ||
Oral drugs to halt neurodegeneration | W22 | 7 | +40% | +40% | 0 | Undisclosed roundMar 2022 | |
LinkedIn content consultancy and scheduling platform for busy founders | W21 | 6 | 0 | $125K | YC investment$125K, Mar 2021 | ||
Bioengineered kidneys for patients with kidney failure | W21 | 5 | −17% | −17% | 0 | $1M | Grant$1M, Jun 2023 |
The social app for edge-of-culture communities | W20 | 5 | 0 | $2.5M | Seed$2.5M, Sep 2022 | ||
Collaborative data noteboook for business teams | S19Acquired | 4 | 0 | $150K | YC investment$150K, Aug 2019 | ||
ML to predict and prevent pregnancy complications | S23 | 3 | 0 | $593K | YC investment$30K, Jul 2023 | ||
High quality mRNA for therapeutic application | S22 | 3 | 0 | $500K | YC investment$500K, Aug 2022 | ||
Drop-in Direct Billing SDK for In-App Purchases | W26 | 2 | 0 | $500K | YC investment$500K, Mar 2026 | ||
Faster processors for solving NP-complete problems | S22 | 2 | 0 | $2.4M | Seed$1.9M, Jun 2025 | ||
Beautifully designed banking for high net-worth individuals. | S20Inactive | 0 | $125K | YC 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 | $120K | YC investment$120K, Jan 2018 |
Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.
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.
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.
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.
# 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
19 Y Combinator companies are based in San Diego; 15 are active.
1 companies posted roles in the last 60 days, led by Recover (7 roles). 1 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Recover (+18%), Sourcify (+8%) and VedaBio (+8%).
No reported rounds after their YC batch in the last 12 months.