Custodian, Platform or Multi-Family Office: three models, one decision

Three terms come up repeatedly in conversations about organising wealth: custodian, platform, Multi-Family Office. They sound related and are occasionally used interchangeably. Yet they describe fundamentally different things: different layers, different responsibilities, different regulatory frameworks. Understanding the distinctions helps you make a more deliberate choice.

In recent years, the range of offerings in wealth management has become considerably more differentiated. For Relationship Managers looking for the right setup for their clients, and for families seeking to structure their wealth organisation, navigating this landscape has not become easier. This article sets out the three models clearly.

The essentials at a glance

• Custodian (custodian bank): Safeguards assets, processes transactions, provides reporting and account management. Makes no investment decisions. Regulated under the Banking Act.
• Platform: Provides technology and operational infrastructure for wealth advisors and Relationship Managers. The investment mandate remains with the advisor, not with the platform.
• Multi-Family Office (MFO): Takes on an investment mandate, develops the strategy, implements it and bears responsibility towards the client. In Switzerland, FINMA-authorised as a wealth manager and affiliated with a supervisory organisation.

What is a custodian?

A custodian is a custodian bank. It safeguards securities and other assets, maintains accounts, processes transactions and issues custody statements. It is the technical foundation of any wealth management structure: without a custodian, there are no custody positions.

What a custodian is not: a decision-maker. Whether a portfolio invests in technology equities, government bonds or Private Markets vehicles is not decided by the custodian bank. That is intentional. The custodian protects assets but does not evaluate them and makes no recommendations. Swiss custodian banks and their foreign counterparts are subject to the Banking Act, which sets strict requirements for capital, liquidity and accounting.

For families, this means: choosing a custodian alone gives you secure custody, but not wealth management. A further layer is needed for that.

What is a wealth management platform?

A platform in the wealth management context provides tools and infrastructure, typically for Relationship Managers and independent wealth advisors. It can bring together portfolio construction, compliance checks, reporting, client onboarding and transaction processing in a single interface.

The key point: the platform provides the tool. The mandate, the judgement and the client relationship remain with the advisor. The platform is not a contractor in relation to the end client; it is a toolkit in relation to the advisor. Whether it is regulated depends heavily on its scope: pure technology infrastructure without a management mandate is subject to different requirements than a regulated wealth manager.

This has consequences for accountability. If something goes wrong, a strategy underperforms or a risk is underestimated, responsibility lies with the advisor holding the mandate, not with the platform.

What is a Multi-Family Office?

A Multi-Family Office takes on a mandate. It develops the investment strategy together with the family, implements it, monitors it and bears responsibility for it. It is not a supplier of a tool, but a contractor with accountability.

A Multi-Family Office serving several independent families is generally classified as a wealth manager under the Financial Institutions Act (FinIA) and requires FINMA authorisation. It is subject to ongoing supervision by a recognised supervisory organisation. That is not a minor detail: the authorisation requirement creates minimum standards for governance, risk management, conflict of interest rules and documentation.

An independent MFO is not a bank. It does not distribute its own products and does not receive retrocessions from product providers. It freely selects custodians, investment instruments and third-party providers based on the interests of its clients, and that independence is structurally secured, not merely promised.

In practice, this means the MFO can combine a Swiss custodian bank with a foreign custodian in a single mandate, draw from the full investment spectrum without being tied to proprietary products, and coordinate tax, legal and succession planning matters alongside that. Technology supports reporting, the consolidation of multiple custodians and communication, but does not replace judgement.

Why the distinction matters for Relationship Managers

Many Relationship Managers work with all three elements simultaneously: a custodian for custody, a technology solution for operational efficiency, and an MFO for complex mandates they cannot or choose not to handle fully themselves.

That is not a criticism of the RM, but a description of market reality. Not every client mandate requires the same setup. Simple custody accounts with clear investment preferences do not require an MFO. Complex family assets with multiple custodians, real estate in different jurisdictions, succession planning and ongoing tax considerations benefit considerably from one.

The question an RM should answer for a client is not: “Which platform offers the best interface?” It is: “At which level should responsibility lie, and with whom?”

Three layers, not an either-or choice

Custodian, platform and Multi-Family Office are not competitors on the same level. They are layers that build on one another:

The custody layer (custodian) is the foundation. The infrastructure layer (technology, platform) enables operational efficiency. The mandate and judgement layer (MFO) takes responsibility for strategy and outcome.

A provider claiming all three roles should be able to demonstrate the regulatory basis on which it does so. A pure technology provider positioning itself as a wealth manager without FINMA authorisation for that activity is operating in a grey area that is relevant to the end client.

Everon is a FINMA-regulated wealth manager and Multi-Family Office. The mandate, the judgement and the responsibility lie with us. For custody, we select the custodian bank that fits the family’s situation. We use technology where it helps: in reporting, consolidation and communication. It is a tool, not the offering.

Frequently asked questions about custodians, platforms and Multi-Family Offices

What is the difference between a custodian and a Multi-Family Office?

A custodian is a custodian bank: it safeguards assets, processes transactions and maintains securities accounts, but makes no investment decisions. A Multi-Family Office takes on a mandate: it develops the investment strategy, implements it and bears responsibility towards the client. Both are regulated, but operate on entirely different levels.

Is a wealth management platform the same as a Multi-Family Office?

No. A platform provides technology and operational infrastructure for Relationship Managers. The mandate, the judgement and the client relationship remain with the advisor. A Multi-Family Office, by contrast, takes on the mandate, the strategy and the responsibility itself, supported by its own technology as a tool.

Which model suits a Relationship Manager who wants to serve clients?

That depends on the preferred division of responsibilities. A platform gives the RM operational tools, but the RM holds the mandate. A Multi-Family Office takes on the mandate, while the RM remains the relationship anchor. With a custodian alone, the wealth management layer is absent entirely. Many RMs combine all three.

Does a Multi-Family Office in Switzerland need FINMA authorisation?

A Multi-Family Office that manages assets for independent families is generally classified as a wealth manager under the Financial Institutions Act and requires FINMA authorisation. Ongoing supervision is carried out by a recognised supervisory organisation. A custodian is subject to the Banking Act; a pure technology platform without a management mandate may be subject to different or no authorisation requirements, depending on its scope.

Why do entrepreneurial families often choose a Multi-Family Office over a private bank?

Private banks typically distribute their own products and therefore have a structural conflict of interest. An independent Multi-Family Office acts solely on behalf of the family, without retrocessions, can freely choose custodians and investment instruments, and consolidates investment strategy, reporting, tax and legal matters, and succession planning in one place.