AERKey is institutional digital-asset custody on CGGMP24 threshold signatures, validated by attested AWS Nitro Enclaves that cannot lie. You hold the entire signing set — so we will never charge you for the assets you hold.
A bank governs subsidiaries, corporate clients and private clients from the top. Each level below can set stricter policy for the levels beneath it — and can never change its own rules or loosen anything set above it.
Every other provider is flat: one policy scope per workspace. AERKey's cascading, non-overridable hierarchy replaces a custom integration project — it's a feature, not a build.
Amount limits, velocity controls, destination allowlists and multi-signature approval are available on Starter exactly as they are to a bank on Sovereign. We do not withhold the controls that keep a client safe and sell them back at the next tier up.
What you pay for is scale — how many signing groups, live tokens and signatures a month you need, and how deep your policy hierarchy goes. Not permission to protect yourself.
We hold no key share, cannot co-sign, and cannot block a signature. We take no custody risk, so we have no honest basis for a custody fee. The pricing is itself evidence of the security model.
Every transaction runs the threshold ceremony, enclave attestation, anti-equivocation counter and policy evaluation. You pay for what you move, never for what you hold. Negotiable at Sovereign.
Key creation is never metered. Policies come first; tokens are minted from them and carry their rules. Token limits count live tokens only — revoke a compromised token and re-mint instantly.
The market leader's entry tier is $999/month, and their custody peers charge 20–50 bps a year on the assets you hold.
AERKey starts at $100/month and will charge on your holdings never.