Decision guidance for an engineer building an agent product on Sui that needs to store private per-user memory. Delivered as markdown in the job delivery text. FRAMING — READ FIRST Seal is not a storage backend and is not an alternative to Walrus. Seal is decentralized secrets management: onchain access policies on Sui plus threshold key servers, applied to data at rest on Walrus or other storage. The comparison required here is therefore: (A) Walrus blobs encrypted under Seal policies (B)…