Self-hosted MPC wallet infrastructure. Your keys, your coins.

As crypto companies grow and manage larger volumes of digital assets, secure and efficient wallet infrastructure becomes mission-critical. Multi-party computation (MPC) wallets are emerging as the standard for key management. But once you decide on using MPC, there’s another key decision to make:

Should you deploy the wallet infrastructure yourself (self-hosted MPC wallet)? Or use a hosted MPC wallet service ̣(SaaS-based wallet infrastructure)?

TL;DR:

• If your team requires maximum control - due to regulation, internal security, or risk posture - a self-hosted MPC wallet setup may be more suitable.
• If time to market, operational efficiency, and ease of use are the priorities (especially for fast-moving startups), hosted MPC wallet services can offer a secure and developer-friendly alternative.

How Self-Hosted MPC Wallets Work

In a self-hosted setup, your team operates the MPC nodes. The key shares and signing logic are fully run within your infrastructure (cloud, hardware, or hybrid). You control how shares are stored, where signing happens, and how to monitor the system.

Self-hosted MPC wallets offer the potential for complete control over wallet operations. This comes with notable advantages in compliance and customization but also introduces operational complexity.

Pros:

• No Vendor Lock-In: You own the full stack: keys, infrastructure, and policy engine. You can migrate systems, switch vendors, or restructure operations without needing your users to change wallets or addresses.
• Custom Integration: Ideal for teams with complex systems or internal workflows. You can deeply integrate the wallet infrastructure into your signing logic, treasury operations, compliance stack, or risk engine with flexibility.
• Data Privacy & Control: No external party observes or participates in your signing process. For companies dealing with sensitive client data or strict data governance rules, this setup can align better with internal policies.
• Reduce Counterparty Risk: There’s no risk of a provider mishandling key material or experiencing a breach that affects your assets. Key shares and signing logic stay within your control.
• Compliance & Data Residency: Certain regulatory frameworks require or imply that custodians store the keys in a specific geographic location. For example, the EU’s MiCA and GDPR frameworks may require key material to be stored within the EU or in “adequate” jurisdictions. If you rely on a SaaS-based infrastructure outside of these regions, you might need to run multiple providers or, worse, lose access to certain markets.
• Operable totally offline: in environments with stringent security requirements, an air-gapped system is necessary to mitigate external attack vectors. 

Cons:

• Higher Operational Burden: Your team is responsible for deploying and maintaining infrastructure.
• Expertise Needed: Need in-house security/crypto expertise to handle key material and updates.
• Longer integration time: Getting a production-ready, secure setup in place takes time. For teams racing to market, this delay could slow down product deployment or new feature rollouts.

Ideal for:

• Custodians or exchanges needing full compliance control
• Enterprises with strict security policies or internal regulations
• Teams with DevSecOps resources and experience running secure infrastructure

Teams can either build everything from scratch or use a provider’s licensed solution (like Fystack’s ) to self-host. The second option is increasingly common, as it reduces development burden and avoids the need for deep in-house cryptography expertise.

Fystack’s wallet infrastructure is built on top of mpcium , our open-source MPC engine designed for developers and DevOps teams.

Our MPC nodes are easy to set up, production-ready, and optimized to reduce the barriers of working with complex cryptography. You don’t need to be a cryptography expert to run secure, high-availability MPC wallets.

With Fystack, teams can deploy secure MPC wallt infrastructure within days without the need to spend months or years researching cryptographic protocols or building from scratch. This significantly reduces development time and effort, allowing teams to focus on delivering core product features rather than reinventing wallet security.

Self-Hosted vs SaaS MPC Wallet Comparison

	Self-Hosted MPC Wallet	SaaS / Hosted MPC Wallet
Control	Full control over infra and policies	Control over wallet & policies, not infra
Setup Time	Weeks to months (Days with Fystack)	Hours to days
Compliance Flexibility	High (can meet specific data residency rules)	Depends on provider's infra & regions
Operational Overhead	High (infra, uptime, updates, security)	Low (provider handles operations)
Customization	Full (can tailor to complex needs)	Limited to what provider exposes
Security Model	You own and secure everything	Non-custodial by design, but infra is shared
Costs	Higher upfront and ongoing maintenance	Lower upfront, subscription-based
Scalability	Depends on in-house infra capacity	Scales with provider's infra automatically

Launch Your MPC Wallets With Fystack

There’s no one-size-fits-all answer. Self-hosted MPC gives you maximum control and flexibility, but comes with more responsibility. Hosted MPC services let you ship faster with lower overhead, but trade off some control.

Fystack offers both fully managed SaaS and self-hosted MPC wallet infrastructure, giving teams the flexibility to choose the best fit, whether optimizing for speed, scalability, or control, without needing to worry about the underlying cryptographic complexity.

Sign up at fystack.io to create your first secure MPC wallet.