Dfns

Dfns is a core banking platform for digital assets that provides wallet infrastructure, key management, and financial operations tooling to institutions, fintechs, and payment providers. Founded in Paris in 2020, the company has evolved from a Wallet-as-a-Service provider into a comprehensive infrastructure layer it describes as an "operating system for blockchain finance." Its platform supports over 100 blockchains including Solana, and as of 2025 processes more than $26 billion in digital assets annually for 324 clients worldwide.

Background and Team

Dfns was founded in August 2020 by Christopher Grilhault des Fontaines, Clarisse Hagege, Houda Ferradi, and Nore Eckerberg. The company was incubated through Techstars and Station F in Paris, and has since expanded to teams across the US, Europe, the Middle East, and Asia. Grilhault des Fontaines and Hagege serve as co-CEOs; Ferradi, a cryptographer by background, contributes to the company's MPC research and protocol design. The team of 35 spans cryptographic engineering, financial infrastructure, and enterprise sales.

Dfns raised a $13.5 million seed round in April 2022, followed by a $16 million Series A in January 2025 led by Further Ventures, the venture arm of Abu Dhabi's ADQ sovereign wealth fund. New investors in the Series A included Motive Ventures, Wintermute, and Motier Ventures (the investment arm of French retail group Galeries Lafayette). Existing backers White Star Capital, Hashed, Semantic, and Techstars also participated. Total funding stands at $29.6 million. The company reached $12.5 million in annual revenue in 2025, a 6.25x increase from the prior year, and reported 300% compound growth since 2021.

The Problem

Managing cryptographic keys at scale for institutional financial operations is an unsolved problem that most organizations approach inconsistently. A bank deploying stablecoin payments, a fintech launching crypto custody, or a payments provider settling tokenized assets each faces the same core challenge: private key security and lifecycle management must satisfy regulatory standards (SOC 2, ISO 27001), handle high transaction volumes without downtime, integrate with compliance tooling, and avoid the catastrophic single-point-of-failure risk inherent in storing private keys in one place. Building this infrastructure in-house requires cryptographic expertise, security auditing, and ongoing maintenance that most organizations lack — and the cost of failure is existential.

Dfns positions itself as the institutional answer to this problem: a white-label, API-accessible infrastructure layer that separates key management from application logic and enforces security policies before any signature operation is permitted.

Technical Architecture

The foundation of Dfns is multi-party computation (MPC). Private key material is split into shares distributed across Dfns signer nodes, so a complete private key is never reconstructed in a single location or moment. The platform implements a threshold Diffie-Hellman protocol derived from the GLOW20 academic paper for cross-network key derivation, enabling a single root key to derive wallets across multiple blockchains and signature schemes — including both ECDSA (used by Ethereum and Bitcoin) and EdDSA (used by Solana).

Key management deployment is available in four models to match client risk profiles and compliance requirements:

• SaaS: Dfns operates all signer node infrastructure in the cloud.
• Co-signer (Hybrid): The client runs one signer node; Dfns operates the others. A threshold of nodes must cooperate to sign, so neither party can unilaterally authorize transactions.
• HSM Integration: Thales Hardware Security Modules store key shares in tamper-resistant hardware. Dfns completed its Thales HSM integration in 2025.
• Validation Gate: A client-controlled checkpoint running on the client's own infrastructure that provides final pre-signing authorization before any operation proceeds. This allows enterprises to enforce internal approval workflows without sharing that logic with Dfns.

Authentication uses WebAuthn passkeys — phishing-resistant cryptographic credentials — rather than passwords. Mutating API calls additionally require User Action Signing: the client obtains a server-issued challenge, signs it with registered credentials, and includes the resulting authorization token in the actual request.

Product Suite

Wallet-as-a-Service is the foundational module. Clients create and manage wallets across 100+ blockchains through a unified REST API and SDKs available in TypeScript, Python, Java, Go, Swift, Kotlin, and Flutter. Wallet operations include creation, asset tracking, transfer execution, and raw payload signing. For Solana, Dfns supports versioned transactions, message encoding specifics, and the EdDSA signature scheme natively. The platform also provides Fee Sponsors — a built-in mechanism for sponsoring transaction fees on behalf of end users on Solana and Ethereum, removing the friction of requiring users to hold native tokens before they can transact.

Policy Engine enforces business rules before signatures are issued. Policies can set spending limits per transaction or per rolling window, maintain whitelists of approved destination addresses, require multi-party quorums for large transfers, and gate operations by asset type or network. Policies are evaluated cryptographically, not as soft guardrails applied after the fact.

Governance Engine provides zero-trust institutional controls: intended operations are verified against declared policies before the signing ceremony begins. This is designed to satisfy the audit and approval requirements of regulated financial institutions.

Transaction Management handles the full lifecycle of signing and broadcast at scale: formatting transactions for each target network, routing them through the policy layer, coordinating the MPC signing ceremony, and broadcasting to the network. Dfns reports throughput of up to 10 ECDSA signatures per second and higher throughput on EdDSA (used by Solana), with 99.997% historical uptime since 2022.

Treasury Management allows institutional clients to manage onchain treasury across multiple entities, currencies, and networks from a single interface, with consolidated reporting and cross-chain visibility.

Tokenization Engine handles the issuance and lifecycle management of tokenized assets: minting, burning, transfer restrictions, and compliance event handling throughout a token's life.

Compliance Integrations connect to AML and KYT screening providers, Travel Rule solutions, and audit logging systems. Dfns maintains integrations with over 100 compliance, exchange, staking, and analytics providers.

Solana Integration

Dfns supports Solana as a first-class network. The platform's documentation includes dedicated Solana-specific guidance covering versioned transactions, message encoding formats for the sign and sign-and-broadcast endpoints, and the EdDSA cryptographic scheme. Fee sponsorship — the ability to pay transaction fees on behalf of wallets — is explicitly supported on Solana alongside Ethereum, enabling gasless experiences for end-user wallets. Clients such as Kraken, which uses Dfns infrastructure, operate across multiple networks including Solana.

The EdDSA throughput advantage is particularly relevant for Solana deployments: Solana's high transaction throughput demands that custody infrastructure can keep pace, and Dfns's MPC protocols perform faster on EdDSA than on ECDSA, making it well-suited to Solana-native operations.

Clients and Partnerships

Dfns reported 324 active clients as of year-end 2025, spanning banking, custody, payments, markets, and tokenization use cases. Notable named clients and partners include:

• IBM: Dfns is the official technology partner for IBM Digital Asset Haven, integrating IBM Z and LinuxONE infrastructure with Dfns MPC and HSM custody technology.
• Standard Chartered / Zodia Custody: Standard Chartered-backed Zodia Custody uses Dfns infrastructure.
• Kraken: The major exchange relies on Dfns wallet infrastructure.
• Circle: The USDC issuer is a Dfns client.
• MoonPay: The payments and onramp provider uses Dfns infrastructure.
• Paxos: The regulated blockchain infrastructure company uses Dfns.
• Stripe / Bridge: Bridge, acquired by Stripe, uses Dfns infrastructure.
• Apex Group: The $100 billion AUM asset servicer uses Dfns for digital asset operations.
• Broadridge: Financial services infrastructure provider Broadridge is a Dfns client.
• Gemini: The regulated US exchange uses Dfns.

The platform supports over 20 million wallets and processes more than $10 billion in monthly transaction volume, with approximately 1% of global stablecoin payments settling through Dfns infrastructure.

Security and Compliance

Dfns holds SOC 2 Type I and II, ISO 27001, ISO 27017, and ISO 27018 certifications. Security audits are conducted quarterly by firms including Halborn, IBM, Kudelski, Quarkslab, and Borg Security. The company carries $15 million in annual cyber insurance coverage and reports zero security breaches and zero client key losses since inception. In 2025, Dfns published a vulnerability analysis of the CGGMP21 MPC protocol, signaling active participation in the academic and applied cryptography community rather than treating security as a black box.

Positioning and Solana Fit

Dfns competes with Fireblocks, Coinbase Developer Platform, and Utila in the institutional wallet infrastructure market, differentiating on its MPC-native architecture, flexible deployment models (including fully on-premises for regulated entities), and its breadth of compliance integrations. Its June 2026 repositioning as a "core banking platform" rather than a wallet company reflects a deliberate move up the stack toward serving financial institutions' full digital asset operational needs.

For Solana-native projects and Solana integrations within traditional finance, Dfns provides a credentialed path to institutional-grade custody and wallet infrastructure: native EdDSA support, fee sponsorship built in, a policy and governance layer that satisfies compliance officers, and a client roster that includes the largest names in both crypto and traditional finance.