Graded at ingestion, not at answer time
Every passage carries its credibility grade from the moment it enters the corpus. Grading is a property of the source, so it cannot be adjusted to make a particular answer look better supported.
Knowledge
Every number on this page is measured.
Corpus claims are generated from the database rather than written into copy, so what you read here is what the retrieval layer actually holds.
- 7,500+
- sources indexed
- 11,000+
- retrievable passages
- 25+
- therapeutic areas
Evidence before eloquence
A curated knowledge base built to answer with receipts.
OpenSupport prioritises authoritative, peer-reviewed and institutional material. Lower-weight commercial content is labelled and never serves as the sole basis for an answer.
7,500+
sources indexed across 25+ therapeutic areas
11,000+ passages are retrievable today. The corpus is refreshed continuously, and stale content is archived rather than served.
Source mix, measured
- Authoritative 58.6%
- Peer-reviewed 26.7%
- Institutional 12.4%
- Government 1.4%
- Community 0.8%
- Commercial 0.2%
Share of 11,000+ retrievable passages as of September 2026. 0 rows without a usable embedding are excluded — they cannot be retrieved, so they are not counted.
How the corpus is governed
Four rules that decide what gets in.
Commercial content is never the sole basis
Manufacturer-published material is retrievable and clearly labelled, but it sits at 0.2% of retrievable passages and cannot carry an answer on its own.
Refreshed continuously, archived when stale
Sources are re-crawled on a schedule matched to how fast each one changes — regulatory labels more often than reference material. Content that goes stale is archived rather than served.
Unretrievable content is not counted
0 rows currently have no usable embedding, which makes them invisible to vector search. They are excluded from every number published on this site.
Figures derived 2026-09-14 and regenerated from the corpus on each release. Exact values: 7,620 sources, 11,383 retrievable passages, 25 therapeutic areas. Published claims are rounded down so they remain true between regenerations.
Ask it something your own content team would struggle with.
The corpus is the product. The quickest way to judge it is to probe the edges of your therapeutic area.