Radical Health
Entrepreneur First '24London, GB · Founded 2024 · 10 known investors
Radical Health develops technology in the medical and healthcare sector. The company is led by a founder with expertise in mathematical oncology and mathematics.
Also known as Radical · Radical Health, Inc.
Founders & leadership
Radical Health was founded in 2024 by Simone Korsgaard Jensen and Simone Jensen.
Investors · 10
Also in the syndicate · 5
Company profile
researched Aug 2026Radical Health builds an AI system it describes as an "AI Oncologist" that generates personalized expert reports for cancer patients. Patients enter their diagnosis (cancer type, stage, treatment history) and connect their medical records; the company states it is integrated with more than 70,000 healthcare organizations across the U.S., so records can be linked rather than uploaded. The system returns a personalized report that compares treatment options side by side, matches clinical trials to the patient's profile, identifies testing gaps, and explains the diagnosis in plain language. The company's website states reports are ready in 24 hours; a Fortune report described the system as returning a report roughly an hour after sign-up and said the app was free and publicly available at the time of publication (December 2025).
Alongside the report, Radical Health assigns a dedicated oncology nurse for patient questions and check-ins, and says its team includes senior nurses from Stanford and Dana-Farber. A continuously running system monitors each case, flagging newly opened clinical trials and newly published research relevant to the patient and surfacing items to the nurse. The company positions the product as complementary to, not a replacement for, a treating physician.
The platform is built on public data plus patient data obtained through partnerships with UCSF and the Mayo Clinic, covering imaging, radiology, pathology, genetic data and patient records for more than 10-11 million cases, according to Fortune and Wilson Sonsini. One trade outlet (Digital Health News) described the company differently — as founded by former Flatiron Health and Tempus executives and building a clinical co-pilot for oncologists — which conflicts with the founder and product details reported by Fortune, Wilson Sonsini and the company's own site.
Founding story
Simone Korsgaard Jensen started Radical Health in 2024 through the Entrepreneurs First accelerator program, arguing that cancer is not one disease but thousands and that AI is the only practical way to search all available research and data and reason from the most similar historical patients to produce personalized recommendations. Per the company's about page, Jensen is a two-time founder who launched a first company at 18 and later built a mathematical oncology startup, with BSc and MSc degrees in mathematics from a Scottish university.
Business model
Direct-to-consumer subscription: the website lists a price of $110 per month with a 7-day free trial and cancel-anytime terms, covering the personalized report, a dedicated oncology nurse, and ongoing monitoring for new trials and research. Fortune reported in December 2025 that the app was then free and available to the general public.
Consumer subscription revenue at $110 per month after a 7-day free trial, per the company website.
Traction
Publicly launched product with a consumer subscription; integration with 70,000+ U.S. healthcare organizations; patient testimonials published on the company site. No user counts or revenue figures are disclosed in the sources.
Latest developments
On December 4, 2025 Radical Health emerged from stealth and announced a $5 million pre-seed round led by Khosla Ventures (TradedVC also names Protagonist as a co-lead, with Vinod Khosla, Harry Hurst, Entrepreneurs First, Headwater and Transpose Platform participating). Fortune reported the app was free and publicly available at that time, while the company website lists a $110/month subscription.
▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies
Market position
Early-stage, recently out of stealth (December 2025), pre-seed funded. The company frames its offering against the conventional expert second opinion, which its site characterizes as costing about $3,000, often out of pocket, and taking weeks to months, versus $110/month and a 24-hour turnaround.
Combines an automated, records-grounded expert report with a human oncology nurse and continuous monitoring of new trials and publications; claims exclusive access to large U.S. hospital datasets (UCSF, Mayo Clinic) covering 11M+ patient records, and co-development with practicing oncologists who sit on NCCN committees and set national standards of care.
Technology
AI models that ingest a patient's connected medical records and reason over large-scale oncology data. The company cites approximately 20,000 treatment options, 11.8 million patient journeys, 5.3 million research papers, 48,800 active cancer clinical trials and 1.5 billion medical notes, and claims a 100% score on the US Medical Licensing Exam (versus a 60% human passing threshold). Underlying data includes imaging, radiology, pathology, genomic and patient-record data drawn from partnerships with UCSF and the Mayo Clinic, covering more than 10 million cases.
Go-to-market
Direct-to-consumer self-service sign-up on the web with a free trial, supported by medical-record connectivity across 70,000+ U.S. healthcare institutions and by credibility signals from named clinical advisers at Kaiser Permanente, Johns Hopkins, Stanford and UCLA. The company emerged from stealth publicly on December 4, 2025 with coverage in Fortune and trade press.
Cancer patients (and their families) in the United States seeking a second-opinion-style review of treatment options, clinical trials and testing gaps; the site cites patients with triple-negative breast cancer, blood cancer and metastatic kidney cancer.
Geography
Product and data integrations are U.S.-focused (70,000+ U.S. healthcare institutions; U.S. hospital datasets). TradedVC lists the company's headquarters as San Francisco, California.
History
Founded in 2024 via Entrepreneurs First. A $5 million pre-seed round closed in November 2024 according to TradedVC. The company operated in stealth and emerged publicly on December 4, 2025, announcing the pre-seed led by Khosla Ventures; Wilson Sonsini Goodrich & Rosati advised on the transaction.
Risks & controversies
Sources conflict on basic company facts: Digital Health News describes Radical Health as founded by former Flatiron Health and Tempus executives building an oncologist-facing clinical co-pilot, which is inconsistent with the founder and consumer-facing product described by Fortune, Wilson Sonsini and the company's own site; that outlet also calls the round a seed rather than pre-seed. Reported headquarters differ between the internal record (London) and TradedVC (San Francisco). Product claims (e.g., 100% on the USMLE, 'nothing missed') are self-reported and unverified in the sources, and the service depends on sensitive patient medical-record access and on data partnerships with UCSF and the Mayo Clinic.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Competitors · 7
by search overlap
Companies competing with Radical Health for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 3
launches, deals, and filingsRadical Health announced a $5 million pre-seed round led by Khosla Ventures (TradedVC also lists Protagonist as co-lead), with participation from Vinod Khosla, Harry Hurst, Entrepreneurs First, Headwater and Transpose Platform. TradedVC states the round closed in November 2024. Wilson Sonsini Goodrich & Rosati advised the company.
$5M source ↗
Fortune reported that Radical Health's model is built on public data combined with patient data drawn from partnerships with UCSF and the Mayo Clinic, including imaging, radiology, pathology, genetic data and patient records covering more than 10 million cases.
Simone Korsgaard Jensen started Radical Health in 2024 through the Entrepreneurs First accelerator program.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
Companies House · registry record
View on Companies House ↗- Registered name
- RADICAL HEALTH LIMITED
- Company number
- 04795576
- Status
- Dissolved
- Company type
- Private limited company
- Incorporated
- 11 Jun 2003
- Dissolved
- 26 Nov 2019
- Registered office
- 771-773 High Road Leytonstone, London, E11 4QS
- Nature of business (SIC)
- 93199 — Other sports activities
- Accounts
- last made up to 30 Jun 2018
Current officers
- Sharon Jane Lillie — secretary, appointed 11 Jun 2003
- Dean Richard Hyams — director, appointed 30 Jun 2018
Source: Companies House public register · retrieved 21 Aug 2026. Contains public sector information licensed under the Open Government Licence v3.0.
▸Research sources · 8
primary sources listed
- Radical Healthradicalhealth.ai · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Radical Health do?
- AI oncology startup producing personalized expert cancer-treatment reports for patients, backed by a $5M pre-seed from Khosla Ventures.
- Who founded Radical Health?
- Radical Health was founded by Simone Korsgaard Jensen, Simone Jensen in 2024.
- Who are Radical Health's investors?
- Radical Health's investors include Entrepreneur First, Headwater Ventures, Khosla Ventures, Protagonist, Transpose Platform Management.
- Where is Radical Health headquartered?
- Radical Health is headquartered in London, GB.