Graded B- on resilience. In Vannus's assessment it routes across several model providers — not captured by one — resilient — owns model IP or routes across providers.
Spellbook has negotiated agreements with both OpenAI and Anthropic for zero data retention (ZDR).
Vannus grades Spellbook 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 →