Non-Custodial Wallet Development for Teams That Shouldn't Hold Customer Keys
We build wallets where the private key is generated on the user's device and never becomes something you can reconstruct. Key storage, a recovery model chosen deliberately rather than by default, and multi-chain signing that holds up outside the happy path.
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What Non-Custodial Wallet Development Covers
Key Generation & Storage
Keys created on-device and held in the platform's secure hardware — Secure Enclave on iOS, Keystore on Android — never transmitted to a server you control.
Recovery Without Custody
Seed phrase, social recovery, or MPC share schemes, each designed so no single party you control can reconstruct the key on its own.
Multi-Chain Signing
Transaction construction, fee estimation, and signing across EVM chains, L2s, and non-EVM chains, with behaviour defined for stuck and replaced transactions.
dApp & Protocol Connectivity
WalletConnect and in-app browser integration, with signing prompts that show the user what they are actually approving.
Built for Specific Buyers, Not Everyone
Fintechs Avoiding a Custody Licence
Want wallet functionality without taking on the regulatory weight of holding customer assets.
Product Teams Adding a Wallet
Have an existing app and users, and need a wallet that respects the auth and UX patterns already there.
Teams Replacing an In-House Wallet
Built one quickly, and now need key handling and recovery that will survive a security review.
If you need to hold and move customer funds on their behalf, that is a custodial build with a licensing path attached — we will tell you that on the scoping call rather than shipping a non-custodial wrapper around a custodial reality.
From Kickoff to Launch
Threat Model & Key Architecture
We define what an attacker gets in each failure case, and pick the recovery model against that rather than against convenience.
→ Threat model + key/recovery architectureSigning Flow Prototype
The riskiest path first — key generation, storage, and a real signed transaction on testnet.
→ Working prototype + testnet transactionsProduction Build & Hardening
Full wallet build with the failure paths handled: network drops mid-broadcast, stuck transactions, device migration.
→ Production wallet in your appSecurity Review & Handoff
Our own review pass, documentation, and preparation of the codebase for an independent audit.
→ Review report + audit-ready documentationTechnologies We Use
Common Questions About Non-Custodial Wallet Development
What actually makes a wallet non-custodial?
The private key is generated on the user's device and never leaves it in a form you can reconstruct. If your servers can sign a transaction without the user, or can recover their funds, it is custodial regardless of what the marketing says — and that distinction usually determines which licences you need.
Can users recover a wallet without a seed phrase?
Yes, but every option trades something. Social recovery spreads trust across guardians, MPC splits the key into shares, and passkey-backed schemes lean on the device vendor. Each changes your threat model, and some edge into custody if you hold a share that is sufficient on its own. We map that explicitly before building.
Which chains and standards do you support?
Most work is EVM chains and their L2s, plus Solana and Bitcoin where the product needs them. On EVM we build against account abstraction (ERC-4337) where it earns its complexity, and plain externally-owned accounts where it does not.
Do you audit the wallet, or do we need a separate firm?
We build to be audited and prepare the codebase, threat model, and documentation for one, and we will run our own security review — but an independent audit by a specialist firm is a separate engagement. Treating your build team as your auditor defeats the point of the audit.
How long does a non-custodial wallet take to build?
A single-chain wallet with a well-defined recovery model typically runs 3-5 months. Multi-chain support, account abstraction, or an MPC recovery scheme each extend that; we scope against your actual chain and recovery requirements rather than quoting a range up front.