Facts you can actually trust.
Every claim cross-checked against independent web sources, cited, dated, and confidence-scored before it goes live. Ask anything.
Featured facts
The immortal jellyfish, Turritopsis dohrnii, can revert from adulthood back to its polyp stage when threatened by danger or starvation.
Abo Elementary School in Artesia, New Mexico was the first public school in the United States constructed entirely underground.
The mantis shrimp can punch with the acceleration of a .22 caliber bullet, creating cavitation bubbles that reach 4,700°C—nearly as hot as the sun's surface.
Venus rotates so slowly that a day on Venus (243 Earth days) is longer than a year on Venus (225 Earth days).
Tardigrades can survive in outer space, withstand pressures six times greater than the deepest ocean trenches, and live without food or water for more than 30 years.
Cleopatra lived closer in time to the Moon landing (1969) than to the construction of the Great Pyramid of Giza by roughly 500 years.
The Great Emu War of 1932 saw the Australian military deploy soldiers with machine guns against 20,000 emus—and the emus won, with the operation abandoned as ineffective.
The last widow of a Civil War veteran died in 2020: Helen Viola Jackson married 93-year-old James Bolin in 1936 when she was 17.
The guillotine was still in official use in France when Star Wars was released in 1977; the last execution by guillotine occurred in 1977, abolished in 1981.
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How DeepInquiry differs
Most AI-trust tools evaluate your data or your model's output and hand back a probability. That's useful. It's also not the same thing as knowing what's true. DeepInquiry sits one layer deeper: a verified fact corpus that AI systems can actually cite.
AI evaluation tools
Score model output
Statistical confidence on whether an AI answer seems correct. Runs on your data. Delivered inside a dashboard.
DeepInquiry
A verified fact corpus, served by API
Every claim cross-checked against independent sources, cited, dated, and tier-scored before it goes live. You get facts, not probabilities.
- We own the corpus.1,000+ facts and growing, each with independence-scored source clusters, citogenesis detection, and gold/silver/bronze verification tiers — not a service that runs on top of your data.
- Never a single source.Two or more structurally independent sources per fact. Wikipedia mirrors and content aggregators are excluded from independence scoring. If it can't be corroborated, it doesn't ship.
- Auditable, not opaque.Every fact response returns its full source cluster, independence score, cluster count, and verification tier. Governance teams get the provenance trail they actually need.
- Built for RAG, agents, and grounded UIs.A natural upstream source of truth for any grounded AI workflow: verified facts in, higher-quality outputs out.
Others score the AI. DeepInquiry is the ground truth AI can cite.
Verify facts in your product
One API call, one confidence score, one set of citations. Free tier includes 500 requests/month.
curl https://api.deepinquiry.ai/v1/verify \
-H "x-api-key: $DI_KEY" \
-d '{"claim":"The Great Wall of China is visible from the Moon"}'