Graded D on resilience. In Vannus's assessment it builds its own model-layer IP on top of a third-party core — single-point-of-failure risk.
Sonar — Perplexity's grounded search model.
Vannus grades Perplexity AI against nine dimensions of trust — data sovereignty, training privacy, compliance posture, operational resilience, exit portability, and more. The heaviest criterion asks whether the tool builds its own AI or resells someone else's model; where the vendor discloses it, the grade cites the vendor's own documentation. No paid placements — scoring is walled off from affiliate revenue. See the methodology →