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Your Wallet Logic,
Handled by FinLego

Build secure, scalable crypto wallets - custodial or non-custodial - without reinventing the backend. FinLego handles infrastructure, asset flows, and compliance so you can focus on UX.
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Infrastructure Designed for Crypto Wallet Teams
Whether you’re building a retail crypto wallet, Web3 gateway, or embedded custody solution, FinLego provides the backend components to support fast, secure, and flexible wallet products. Handle fiat on/off ramps, multi-chain balances, KYC, and transaction monitoring - all from a modular platform built for scalability.
What Slows Down Crypto Wallet Products - and
How FinLego Solves It
  • Choosing Between Custodial
    and Non-Custodial
    Wallet teams often get stuck deciding custody models before building anything.

    →
    FinLego supports both custodial and non-custodial wallet infrastructure - build, test, and pivot without architectural lock-in.
  • Multi-Chain, Multi-Asset
    Complexity
    Users expect support for Bitcoin, Ethereum, stablecoins, and L2 tokens - each with unique logic.

    →
    Our wallet engine supports multi-chain and token support out of the box with dynamic fee handling and contract integrations.
  • Fiat On/Off-Ramp Integration
    Regulatory and technical hurdles delay fiat ramp setup.

    →
    FinLego integrates fiat rails (SEPA, SWIFT, local payouts) and payment providers, so you can offer seamless user funding and withdrawals.
  • Compliance in Decentralized Contexts
    Even non-custodial apps need proper KYC for regulation.

    →
    Use our flexible compliance toolkit to apply KYC, AML, and transaction monitoring - configured per region and wallet type.
All the Infrastructure You Need - Customizable by Model
Wallet Engine
Launch wallets with private key control (non-custodial) or FinLego-managed custody - supporting major blockchains and tokens.
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Core Ledger System
Maintain transaction records, gas fee handling, and off-chain balance tracking with full audit support.
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KYC/AML Tools
Identity verification, document upload, and sanctions screening - configurable by jurisdiction or wallet tier.
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Crypto Payments
Enable asset transfers, swaps, and fiat conversions through integrated liquidity and blockchain APIs.
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Money Transfers
Add fiat payout capabilities to on-ramp/off-ramp flows - integrated with banks and PSPs worldwide.
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Mobile & Web Frontend Kits
Use our ready-made UI components or white-label apps to get your product to market faster.
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What Web3 Builders Are Saying
Sofia
Co-Founder
We launched a non-custodial wallet that supports multiple chains and assets - and didn’t touch a backend server.
Dominic
CTO
FinLego helped us turn our Web2 wallet into a fully regulated custodial crypto product with fiat ramps.
Ingrid
Product Manager
We went live in two months with KYC, compliance, and multi-asset support already in place.
Security Architecture Designed for Crypto Wallets
  • Secure key management
    with optional HSM and MPC custody
  • Customizable velocity limits,
    anti-fraud triggers, and IP/device tracking
  • GDPR-compliant data handling
    and audit-ready logs
  • Built-in compliance workflows
    for fiat ramps and custody obligations