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YC Diagnostics companies

59 Y Combinator companies in Diagnostics, 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
21 roles
BillionToOneS17
  1. 2Probably Genetic6
  2. 3Opentrons3
See all 5
Fastest growingteam, 6 months
+27%
Probably GeneticW19
  1. 2Eden+20%
  2. 3BillionToOne+13%
See all 14
Shrinkingteam, 12 months
−58%
MoichorW21
  1. 2X-Zell−29%
  2. 3Opentrons−8%
See all 3
Raised the mostlast 12 months
$23.8M
Orange Health LabsS20
  1. 2Opentrons$20.1M
  2. 3Cofactor Genomics$1.2M
See all 7
Companies
59
Active
38
Hiring, last 60 days
5
Open roles, 60 days
32
People on these teams
5,090
Showing 50 of 59 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
Redcliffe Labs is India's Largest Omni-channel Diagnostics platform
W212,065+5%+10%0$152MSeries C$42M, Sep 2024
The genetic testing platform detecting and measuring disease.
S17Public866+13%+26%21$426MSeries D$130M, Jun 2024
India's leading on-demand diagnostics company
S20728+8%+8%1$70.8MSeries C$23.8M, Jun 2026
Building Clinical Superintelligence.
S18541+20%+54%YC$29.1MUndisclosed round$7.9M, Apr 2024
We make robots for biologists.
W16193−1%−8%3$260MSeries D$20.1M, Dec 2025
Nomic is doing for proteins what Illumina has done for DNA
W20116+9%+13%YC$60MSeries B$42M, Sep 2024
Blood Test for Early Detection of Ovarian Cancer
S2156+2%+2%0$24.5MGrant$17M, May 2026
Real-World Data for Health Innovation
W2050+9%+9%0$20.4MSeries A$10.4M, Sep 2024
Diversifying precision cancer diagnostics and treatments
S2149−4%+4%0$4.4MSeed$3M, Mar 2022
Personalized drug discovery for blood cancer.
W15Public29+4%+4%YC$57.2MSeries B$189K, Jul 2022
Patient Intelligence Platform for Genetic Disease
W1928+27%+4%6$10.9MUndisclosed round$10.7M, Nov 2023
CRISPR powered Diagnostics with results in minutes.
S2127+8%+8%0$65MSeries A$25M, Sep 2025
Early detection of Alzheimer's disease
S17230%+5%0$14.6MUndisclosed round$3.5M, Oct 2023
Simple tests for complex diseases.
S2221+11%+31%0$7.5MSeed$7M, Apr 2025
Pioneering Breast Cancer Diagnostics for a Healthier Tomorrow
S2119+6%+6%0$261KSeed$136K, Jun 2026
Engineering a future without cancer deaths.
S2317 −6%YC$5MPre-seed$5M, Sep 2023
AI-enabled automation of diagnostic radiology workflow and reporting.
W20Inactive17−11%−11%0$4.2MSeries A$4.2M, Jun 2021
Early, pain-free cancer detection.
W1517−15%−29%0$5.6MSeed$4M, May 2018
AI enabling digital urine diagnostics in the home
W2216 +14%0$13.9MUndisclosed round$825K, Mar 2026
Brain Longevity
W1916+7%−6%0$200KConvertible note$200K, Dec 2021
Fast and low-cost diagnostics for real time disease surveillance
W16Inactive150%0%0$3.6MAngel$33K, Oct 2021
One-hour antibiotic sensitivity testing
S2114+8%+17%0$3.6MSeed$750K, Aug 2026
Cofactor closes the precision medicine gap with predictive diagnostics
S15130%+18%0$28.9MUndisclosed round$1.2M, Dec 2025
At-home diagnostics as a service
W2212 −14%YCSeedMar 2022
The smart testing platform that unlocks digital health at home.
W22120%0%0
Blood testing device for early diagnosis of cancer and treatment…
W17110%−8%0$2.9MSeed$204K, Jan 2023
AI Powered Animal Diagnostics
W2110−23%−58%0$4MSeed$4M, Apr 2021
Cancer screening without barriers
X269+29%+29%1$500KYC investment$500K, Jun 2026
The API for Diagnostic Test Analysis (COVID-19, FLU, RSV, STD,…
W238−11%−33%0$500KYC investment$500K, Apr 2023
Discover drugs that control how much cells "squeeze" to treat disease
W21Inactive8−20%−38%0Undisclosed roundJun 2022
Cancer tests based on whole genome and transcriptome data.
W2080%0%0$5MGrant$2M, Apr 2023
We built the world's first automated digital pathology lab.
W198+14%+14%0$3.2MGrant$1M, Mar 2021
XGenomes is building the sequencing technology of the future.
W198−20%−20%0$200KGrant$200K, Sep 2019
Kenota is revolutionizing the way we test for disease
S16Inactive80%−20%0$11.1MSeries A$9M, Dec 2020
Next-gen blood testing to provide 1000x more data to pharma companies
W18Inactive50%−17%0$10.7MUndisclosed round$9.6M, Oct 2020
Rev is a biotechnology company creating better plants.
S1750%0%YC$120KUndisclosed round$120K, Mar 2020
At-home blood testing: measure + analyze + enhance.
W17Inactive50%0%0$1.8MUndisclosed round$1.1M, May 2021
The AI scientist for always-on biodefense
S244  0$513KYC investment$500K, Jul 2024
Higher resolution MRI with faster scan times.
S234  0$60KYC investment$60K, Jul 2023
Operating systems for biology labs
S18Inactive4  0Non-equity supportDec 2018
Our tests help eradicate cancer by telling doctors whether they got…
S184 −20%0SeedJan 2025
Smartphone-enabled, at-home diagnostics
S18Acquired4  0$3.6MSeed$3.5M, Nov 2019
Nano-diamonds for cancer detection
S14Inactive4  0$1.7MSeed$1.7M, Aug 2014
AI-powered blood test to detect cancer in dogs (and cats soon).
F263  0
Semi-Autonomous Diagnostics for Emergent Care
S212  0$125KYC investment$125K, Aug 2021
A diagnostic lab in a box
S20Acquired2  0$200KYC investment$125K, Aug 2020
Finding the right cancer drug for each patient.
S172  0$120KYC investment$120K, Aug 2017
Personalized prevention using genetics and AI
W241  YC$500KSeed$500K, Jan 2026
AI-designed Affinity Reagents
S211  0Undisclosed roundAug 2021
Low-cost blood glucose test strips scanned with a smartphone camera…
W20Inactive1  0$150KYC investment$150K, Mar 2020

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 Diagnostics companies

How many YC Diagnostics companies are there?

59 Y Combinator companies are in Diagnostics; 38 are active.

Which YC Diagnostics companies are hiring?

5 companies posted roles in the last 60 days, led by BillionToOne (21 roles), Probably Genetic (6 roles) and Opentrons (3 roles). 11 mark themselves as hiring on YC's directory.

Which YC Diagnostics companies are growing fastest?

By team growth over 6 months (10+ people): Probably Genetic (+27%), Eden (+20%) and BillionToOne (+13%).

Which YC Diagnostics companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Orange Health Labs ($23.8M), Opentrons ($20.1M) and Cofactor Genomics ($1.2M).

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