540,000 interventional and observational trials harmonised from public registries worldwide, with phases, conditions, sponsors, site locations, enrolment and status history.
Data product · Listing updated 11 Nov 2026
Worldwide, no country restrictions stated.
Registry changes reflected within 24 hours
540,000 trials and 1.3 million site records
Small and medium businesses, Mid-market, Enterprises, Academia and research
ClinicalTrials.gov, EU CTIS and EudraCT, and WHO ICTRP partner registries
Daily registry pulls, cross-registry de-duplication, MeSH mapping and sponsor normalisation
One harmonised trial database instead of a dozen registries with different formats, identifiers and spellings.
Willowbrook pulls registry updates daily from ClinicalTrials.gov, the EU Clinical Trials Information System and its predecessor EudraCT, and registries that feed the WHO International Clinical Trials Registry Platform. Records are de-duplicated across registries using registered secondary IDs, titles and sponsor matching, then conditions are mapped to MeSH terms. Sponsor names are normalised and linked to parent companies by analysts. Data covers trials registered since 2000. Trial records describe studies, not participants: no patient-level information is included.
14 fields as documented by Willowbrook Health Data.
| Field | Type | Description | Example |
|---|---|---|---|
| trial_id | string | Willowbrook trial identifier | — |
| registry_ids | json | IDs in every registry where the trial appears | — |
| title | string | Official trial title | — |
| phase | string | Phase 1 to 4, or not applicable | — |
| status | string | Recruitment status | — |
| conditions | json | Conditions mapped to MeSH terms | — |
| intervention_type | string | drug, biological, device, procedure or other | — |
| sponsor_name | string | Normalised lead sponsor | — |
| start_date | date | Actual or planned start date | — |
| primary_completion_date | date | Actual or expected primary completion | — |
| target_enrolment | integer | Planned number of participants | — |
| site_count | integer | Number of trial sites | — |
| sites | json | Facility, city and country of each site | — |
| results_posted | boolean | True when results are posted on a registry | — |
Free sample available on request
The provider sends a sample file so you can test fit and quality before you buy.
Prices in USD, as published by Willowbrook Health Data
full database
API access
Converted amounts use DataStoa display rates and are approximate. Willowbrook Health Data quotes the final price, taxes and terms.
Request detailed pricingWorldwide coverage.
Time coverage: 2000 to present.
Provider-reported
Latency: Registry changes reflected within 24 hours
DataStoa has not audited these figures. Ask the provider how they are measured, or test them on a sample.
The licence is agreed directly between you and Willowbrook Health Data. This summary is provider-reported; the linked terms prevail.
Not listed: AI / ML model training, AI retrieval and grounding, redistribution allowed, marketing and outreach. Ask Willowbrook Health Data if you need any of these.
US provider, clinical trial, claims and drug pricing data
Willowbrook Health Data turns public healthcare registries and de-identified claims into analysis-ready datasets for pharma, payers and health-tech companies. It works only with professional, trial, product and aggregated data, and never sells patient-level records.
Also available on: Snowflake Marketplace, AWS Data Exchange, Databricks Marketplace
What buyers say about Willowbrook Health Data. Reviews cover the provider, not only this listing.
from 2 reviews
Procedure volumes by region gave us a defensible market size for a new device. Small cells are suppressed, so rare procedures in small regions come back empty, which is the correct trade-off for de-identified data.
Carlos E., Market access analyst, Medical device maker
Provider-to-hospital and group-practice affiliations were more current than our previous source, which improved territory alignment. Price is at the high end, so we licensed the national file without the API.
Beth A., Commercial analytics director, Specialty pharma company