Privy vs Crossmint: comparison of features and pros

Key takeaways

• Privy and Crossmint take fundamentally different approaches to wallet architecture. Privy secures EOA-based embedded wallets using TEEs and Shamir's Secret Sharing across EVM, Solana, Stellar, and Bitcoin, with ERC-4337 smart wallets available only on EVM. Crossmint uses smart contract wallets as the default across EVM, Solana, and Stellar, with a modular signer layer that can be rotated without migrating assets.
• For teams where the signer layer and the wallet are the same thing, changing providers means migrating users. With Crossmint's dual-layer architecture, the signer can be swapped while the wallet address and its balances stay in place.
• Beyond wallets, Crossmint ships onramps, offramps, stablecoin orchestration, and built-in compliance on the same API. Privy, now part of Stripe following the June 2025 acquisition, can cover adjacent needs through other Stripe products like Bridge, though these remain separate integrations.

The bottom line about Privy vs Crossmint

Privy is a wallet infrastructure platform used by teams spanning consumer apps, fintechs, banks, and AI agent products. Its core model is EOA-based: every user gets an externally-owned account, with the private key secured through a combination of Trusted Execution Environments (TEEs) and Shamir's Secret Sharing so that no single system, including Privy, ever holds the complete key. Privy supports this model across EVM, Solana, Bitcoin, and Stellar. On EVM, Privy additionally offers ERC-4337 smart wallets, where the smart contract is controlled by a Privy embedded signer. Privy was acquired by Stripe in June 2025 and operates as a standalone product alongside Stripe's broader stablecoin stack, including Bridge.

Crossmint takes a different architectural approach. Wallets are smart contracts by default across EVM, Solana, and Stellar, with a modular signer layer that sits separately from the wallet itself. This means teams can rotate signers, mix custody models, and adapt the signing infrastructure over time without migrating assets or disrupting users. Onramps, offramps, stablecoin orchestration, and built-in compliance are available on the same API, so the same integration that provisions a wallet can also move funds across 50+ blockchains, handle KYC, and settle fiat in and out of 160+ countries.

Privy vs Crossmint at a glance

What's the difference between an EOA wallet and a smart contract wallet?

Every wallet comparison in this space eventually comes down to one question: what is the account that holds your users' assets? There are two answers, and the choice shapes everything from security guarantees to how hard it is to switch providers later.

An externally-owned account (EOA) is the original wallet model on most blockchains. It is defined by a single private key. Whoever holds that key controls the account. That makes the key both the account's identity and its sole security mechanism. If the key is lost, the wallet is lost. If the key is compromised, the assets are gone. Modern embedded wallet providers, including Privy, harden this model by never exposing the full key to any single system. Privy splits the key into shards using Shamir's Secret Sharing, stores the shards in isolated hardware, and only reconstructs the key inside a Trusted Execution Environment at the moment of signing. This is a meaningful security improvement over a naked private key, and it preserves self-custody. The underlying wallet is still an EOA, so the security model is still tied to the integrity of the key and the infrastructure that manages it.

A smart contract wallet changes the account itself. Instead of a single private key controlling the wallet, the wallet is a smart contract deployed onchain, and the contract defines who can authorize transactions. The entities that authorize transactions are called signers, and a smart contract wallet can have one, several, or many signers, with rules about which combinations are valid. Signers can be rotated, added, or revoked without moving the wallet or its assets. Spending limits, role-based approvals, session keys, and recovery rules can all be encoded directly into the contract. On EVM, the most common standard for this is ERC-4337.

The practical difference shows up most clearly in two situations. First, key compromise: with an EOA, a compromised key is a drained wallet. With a smart contract wallet, a compromised signer can be rotated out and the wallet keeps working, with the same address and the same balance. Second, vendor lock-in: with an EOA managed by a provider's hosted infrastructure, switching providers means migrating every user's assets to a new wallet. With a smart contract wallet and a modular signer layer, the wallet stays where it is and the signer is swapped underneath. The wallet address never changes.

How Privy implements this

Privy's default embedded wallet is an EOA, secured through the TEE and Shamir's Secret Sharing model described above, available across EVM, Solana, Bitcoin, Stellar, and other chains. On EVM only, Privy also offers ERC-4337 smart wallets, where the smart contract wallet is controlled by a Privy embedded signer (which itself is a Privy-managed EOA). This gives EVM users access to account abstraction features like gas sponsorship and transaction batching, while still tying the signing layer to Privy's hosted infrastructure.

How Crossmint implements this

‍Crossmint's default wallet is a smart contract wallet across EVM, Solana, and Stellar. The signer layer is modular. Teams can use Crossmint's native signers (TEE-based for end users, AWS KMS, Azure Key Vault, and GCP HSM for enterprise and treasury) or bring their own signer, including Privy's signing infrastructure. Custody can be configured per user, so the same application can run self-custodial wallets for some users and custodial wallets for others under the same infrastructure. Because the wallet is a smart contract, policies like spending limits, allowlists, multi-sig approvals, and delegated signers are enforced onchain rather than at the application layer.

How to evaluate Privy vs Crossmint

Wallet infrastructure and architecture

Privy's wallets are production-tested at scale with sub-100ms signing latency across its platform. For EOA-based use cases, the TEE and key-sharding model is a strong security design. For teams that need smart wallet features on EVM, Privy's ERC-4337 smart wallets deliver gas sponsorship, batching, and programmable permissions, with the signer controlled by Privy's hosted infrastructure.

Crossmint's wallet infrastructure provides smart contract wallets by default on EVM, Solana and Stellar. The modular signer architecture means the wallet layer and the signing layer are decoupled, so teams can start with Crossmint's native signers and later plug in a different provider, including Privy's signing infrastructure, without changing wallet addresses or moving assets. Policies that would normally live in application code — spending limits, multi-sig approvals, allowlists — are enforced by the smart contract itself and can be audited onchain.

Compliance and regulatory coverage

Privy is SOC 2 Type II certified. As a wallet infrastructure provider, Privy is not a regulated financial institution. KYC, AML screening, and regulatory compliance are handled at the application level by each team building on Privy. Teams that need to comply with financial regulations in the EU, UK, or US must source and maintain that compliance layer separately.

Crossmint handles compliance as part of the platform. KYC/KYB, AML screening via Elliptic and Persona, and travel rule compliance via NotaBene are all built in. For teams building in regulated markets, particularly in Europe under MiCA, Crossmint removes the need to source and maintain a separate compliance stack.

What else comes with each platform?

Wallets are one layer of a payments product. Onramps, offramps, stablecoin routing, and compliance are the layers that turn wallet infrastructure into something a fintech, remittance company, or consumer payments app can actually ship.

Privy is focused on the wallet and auth layer. For onramps, most teams integrate a third-party provider like Crossmint's Onramp, Coinbase, MoonPay, or Transak. Following the June 2025 Stripe acquisition, Privy customers can also reach for other Stripe products: Bridge for stablecoin rails, Stripe's fiat infrastructure for card and bank transfers, and Stripe's compliance stack. These are separate products with separate integrations, but they sit under the same parent company.

Crossmint ships the wallet layer and the payments layer as a single platform. Onramps into 160+ countries, offramps out of 100+ countries, and stablecoin orchestration across 50+ blockchains are available through the same API that provisions the wallet. KYC/KYB, AML screening, and travel rule compliance are built in. Customers like MoneyGram and Western Union run production payment flows through this stack.

Which solution should I choose?

The right answer depends on what you are optimizing for. These are the criteria that tend to separate the two platforms in real evaluations.

If onboarding speed and auth UX are your top priority

Both platforms deliver email and social login in a few lines of code, and both are used in production at scale. Privy has invested heavily in progressive authentication and has a long track record with consumer crypto apps. Crossmint offers the same onboarding primitives and lets teams bring their own auth provider if preferred. On this axis alone, the two are closer than their positioning suggests.

If you want to avoid vendor lock-in

Crossmint. A smart contract wallet with a modular signer layer means the signer can be rotated, including to a different provider, without migrating assets. A Privy wallet is tied to Privy's hosted signing infrastructure; switching providers means migrating users to new wallets at new addresses.

If security architecture is the deciding factor

Both platforms are non-custodial by default, and both have strong security models. The architectural difference matters in specific scenarios. If a signing key is compromised, an EOA wallet has no recovery path other than moving funds out quickly. A smart contract wallet can rotate the compromised signer onchain, and the wallet continues working. If that scenario matters for your product, Crossmint's architecture handles it natively across every supported chain. If your product is EVM-only, Privy's ERC-4337 smart wallets offer the same rotation on EVM.

If you need smart wallet features on non-EVM chains

Crossmint. Privy's smart wallet support is EVM-only. For Solana or Stellar products that want onchain policies, signer rotation, or multi-sig, Crossmint is the only one of the two that provides smart contract wallets there.

If your product needs end users to hold, send, and spend stablecoins or crypto

Both platforms can handle wallet provisioning. If your roadmap includes buying stablecoins or crypto with a card, cashing out to a bank account, or routing across chains, Crossmint has those capabilities on the same API. With Privy, you are assembling them from other providers, which can include other Stripe products like Bridge.

If you are building enterprise treasury or B2B payment flows

Both platforms can support treasury and B2B payment flows. Privy's server wallets support wallet fleets, multi-approver quorums, and programmable session signers for recurring flows, enforced at the signing service layer. Crossmint's smart contract wallets enforce the same kinds of policies onchain through the contract itself, and the platform supports AWS KMS, Azure Key Vault, and GCP HSM as native signers, which lets enterprise finance teams use their existing HSM infrastructure directly. For treasury setups where onchain auditability and direct integration with enterprise KMS are priorities, Crossmint is the closer match. 

Strategies for using both

The two products operate at different layers and can coexist. Because Crossmint's smart contract wallets are signer-agnostic, teams using Privy today can point a Crossmint smart contract wallet at Privy's signing infrastructure as the operational signer, keeping the Privy auth and wallet UX while gaining the wallet-layer flexibility, onchain policies, and payment infrastructure that Crossmint provides. This is a common path for teams that have already integrated Privy and want to add smart wallet capabilities or payment flows without ripping out their auth layer.

Interested in smart wallets? Reach out to our team here to learn more!

FAQs

What is the difference between an EOA wallet and a smart contract wallet?

An EOA (externally-owned account) is controlled by a single private key; the key is the wallet's identity and its only security mechanism. A smart contract wallet is an onchain program that defines its own authorization logic, with signers that can be rotated, spending limits encoded in the contract, and multi-sig or role-based rules enforced onchain. Privy's default embedded wallet is an EOA, secured with TEEs and Shamir's Secret Sharing. Crossmint's default wallet is a smart contract wallet across EVM, Solana, and Stellar.

Does Privy support smart wallets?

Yes, on EVM. Privy offers ERC-4337 smart wallets on EVM chains, where the smart contract is controlled by a Privy embedded signer. On Solana, Stellar, Bitcoin, and other non-EVM chains Privy supports, wallets are EOA-based. Crossmint supports smart contract wallets across EVM, Solana, and Stellar by default.

What does it mean that Crossmint uses a dual-layer architecture?

In Crossmint's model, the wallet is a smart contract deployed onchain and the signer is a separate layer that authorizes transactions on the wallet's behalf. The two are not bound together. That means teams can change signers — from a TEE-based signer to a KMS-based signer to a third-party signer, for example — without changing the wallet address or migrating any assets. In an EOA model, the key and the wallet are the same thing, so changing signers means creating a new wallet.

Can I switch from Privy to Crossmint without migrating user assets?

Yes, with a specific setup. If a team already runs Crossmint smart contract wallets and uses Privy as the signer, switching the signer is a wallet-level action; addresses and balances stay in place. If users today are on Privy EOA wallets directly, those wallets exist at an address tied to Privy's signing infrastructure, and moving to a different model requires a migration.

Does Privy offer onramps, offramps, or stablecoin payment rails?

Not natively. Onramps are typically added via a third-party provider like Crossmint Onramp, Coinbase Onramp, MoonPay, or Transak. Following the June 2025 Stripe acquisition, Privy customers can also reach for other Stripe products, including Bridge for stablecoin rails, as separate integrations. Crossmint ships onramps, offramps, and stablecoin orchestration across 50+ chains on the same API as the wallet.

Can I use Privy and Crossmint together?

Yes. Crossmint's smart contract wallets can be configured with any signer, including Privy's. Teams using Privy for authentication and signing can run Crossmint smart wallets underneath to gain onchain policies, signer flexibility, and Crossmint's payment infrastructure without replacing their auth layer.

How do Privy and Crossmint compare on compliance?

Privy is SOC 2 Type II certified and operates as a non-custodial wallet infrastructure provider; KYC, AML, and regulatory compliance sit at the application layer for teams building on Privy. Crossmint is SOC 2 Type II certified and holds CASP licenses across all 27 EU member states under MiCA, with KYC/KYB via Persona, AML screening via Elliptic, and travel rule compliance via NotaBene built into the platform.