Wallets

Self-custodial accounts that make crypto invisible

Wallets as simple to integrate as OAuth, without the hidden custody trade-off. Smart accounts and passkeys generate keys on the user's device, so no third-party vendor sits in the chain of custody and compliance never becomes the bottleneck.
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Wallets product interface preview

Custodial-grade experience.
Self-custodial by architecture.

Face ID to sign up. No seed phrase, no extension, no gas token, no chain switching. Keys are generated inside the user's device hardware and never leave it. Rhinestone accounts are self-custodial by design and stay that way at every scale.

Passkey account sign-up and biometric authentication interface

Passkey accounts

Users sign up with their biometrics. Signing happens locally, so it's fast, with a flexible recovery model to meet your regulatory needs.

Hardware-grade security

Flexible recovery model to meet your regulatory needs

Multichain keystore built in

Gas and fees, handled

Sponsor gas, swap and bridge fees on any supported chain from a single balance. Build stablecoin apps that don't require users to understand gas tokens or any other DeFi fees.

Global gas sponsorship

Pay fees in any token

Sponsor DEX and bridge fees

Gas sponsorship and multi-token fee management interface
Session key permissions and delegated signing interface

Session keys

Let users delegate narrow, revocable permissions: this token, this amount, this contract, this long. Limits are enforced by the account onchain, not promised by a backend.

Build single-click flows

Delegate scoped keys for agents

Self-custodial and revocable

Coverage

Chains

18 EVM networks, Solana and Tron.

Signers

Passkeys, external wallets, multisig, server-side keys.

Modular

Rhinestone co-authored ERC-7579 and is EIP-7702 compatible.

Who is it for?

Regulated fintechs

You need keys generated and held by the user, provably, to keep your architecture unhosted. This is the specific thing we're built for.

Consumer crypto apps

You're onboarding people who have never held a private key and should never deal with the pain of having to.

Agent platforms

Your agents need scoped permissions to spend without taking custody.

One integration. One SLA.

Rhinestone commits to SLAs no self-custodial vendor can match. Every flow is self-healing and replayable, without compromising on security, self-custody or the user experience.

Uptime

Fulfillment rate

Settlement time

Coverage

Response time

Recovery

SLAs are agreed per integration.

Self-custodial money movement for modern fintechs

We work closely with a small number of teams at a time. Tell us what you're building.

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