---
title: The family office technology stack
description: The single-family office technology stack in 2026: portfolio platform, accounting, document vault, email and AI, what each layer does and how they connect.
canonical: https://privatesuperintelligence.si/blog/family-office-technology-stack/
last-updated: 2026-10-15
---

# The family office technology stack

A single-family office technology stack usually has five layers: a portfolio and reporting system, accounting and entity records, bill pay and treasury, a document vault, and the office's email, calendar and contacts. AI now sits across all five. Citi Institute's May 2026 report on AI in the family office found that the fintech market "currently offers no perfect single solution for family offices to buy," so most offices assemble a stack and connect the pieces themselves.

## The five layers and what each one does

| Layer | What it holds | Examples, in each vendor's own words |
|---|---|---|
| Portfolio and reporting | Positions across custodians and managers, performance, consolidated reports | Addepar: turns "multi-custodial data, illiquid alternatives and complex legal entities" into one source of truth. Masttro: connects directly to "750+ custodians worldwide." Asora: "Software for the modern family office" that automates data aggregation and customised reports |
| Accounting and entities | General ledger, entity books, ownership structure | Asset Vantage: "unites general ledger and performance reporting" and supports trusts, partnerships, LLCs, foundations and other entities |
| Bill pay and treasury | Payables, household and property expenses, wires | Eton Solutions lists bill pay and tax prep among the tasks EtonAI automates, inside a platform "Built by a Family Office for Family Offices" |
| Document vault | Trust deeds, LLC agreements, K-1s, insurance, statements | Asset Vantage's "Document Vault" organizes documents "across entities, groups, and transactions"; Asora and Eton also manage documents alongside the portfolio |
| Email, calendar and contacts | The principal's inbox, adviser threads, meeting notes, the office's relationships | An email and calendar suite such as Microsoft 365 or Google Workspace, plus a CRM or contact list |

Some products span several layers. Citi groups family office providers into five categories: performance reporting and intelligence; accounting, entity and financial control; integrated or multi-module platforms; private markets operations; and governance, risk and collaboration. Eton, for example, describes managing "portfolios, documents, and entities in one unified system," while other offices pair a reporting system with separate accounting software.

## How offices choose

Citi's interviews give a clear picture of the buying process. Offices look for "software maturity, data readiness and comprehensive solutions that can be integrated easily." Most prefer to buy rather than build. Some build their own AI tools on open-source models, but only above a high bar, such as 80% or greater efficiency gains, and otherwise wait for the next generation of products. Citi also describes a modular approach: solve one problem well with a smaller tool, and keep the freedom to swap components when something better appears.

The constraint is people. Citi reports, citing the Citi Wealth 2025 Global Family Office Report, that 57% of family offices name lack of internal expertise as the biggest barrier to technology adoption. A lean team running five or six systems spends hours keeping them in step, so integration matters as much as features.

## Where the gaps sit between layers

The portfolio system knows positions. The accounting system knows the books. The document vault holds the paper. Most of the work that connects them happens by hand, in the gaps:

- A capital call notice arrives by email, someone books it in accounting, updates the unfunded commitment in the portfolio system and files the PDF. See [capital call tracking](/blog/capital-call-tracking/).
- A K-1 arrives in September, and someone matches it to the right entity, files it and forwards it to the CPA. See [K-1 tracking across entities](/blog/k-1-tracking-across-entities/).
- Monthly statements from advisers get consolidated, and Citi found that this still happens in Excel at many offices. See [consolidated reporting](/blog/family-office-consolidated-reporting/).
- The principal asks a question ("what did we agree with the property manager last spring?") whose answer lives in an email thread, not in any system.

The email layer is the largest of these gaps. Portfolio and accounting systems hold structured data, while the decisions, instructions and context of the office live in correspondence and documents.

## Where AI fits in the stack

Most of your vendors now offer AI features. Addepar describes "native AI," Masttro offers "AI Powered Wealth Intelligence," and Eton calls itself "AI-powered." Citi's interviewees told the researchers that traditional vendors have become AI-enabled, though often slower than offices would like.

AI inside each product works on that product's data. An AI assistant that works across the stack does a different job: it reads the email, the documents and the reports together, answers with citations to each, and moves information between systems with a person approving. The two kinds of AI complement each other, and the portfolio system stays the system of record.

Each new AI feature is also a new place where family data gets processed. Citi warns that some offices have access to AI through "the back door" via SaaS providers or devices they already use, and that offices worry about third-party vendors accessing family information. Before you switch on an AI feature in any layer, ask the same questions:

| Question | Applies to |
|---|---|
| Which AI model provider processes our data, and under what retention terms? | Every vendor with an AI feature |
| Is our data used to train any model? | Every vendor, and every model provider behind it |
| Who at the vendor can see family information? | Support staff, implementation teams, model providers |
| Where is the data stored and processed? | All layers, especially documents and email |
| Can we turn the AI feature off, per user or per entity? | Products where AI is on by default |

Our [AI vendor due diligence checklist](/blog/ai-vendor-due-diligence-checklist/) turns these into a document you can send. For a closer look at portfolio systems and AI side by side, see [Addepar, Masttro and AI](/blog/addepar-masttro-and-ai/).

## Private SuperIntelligence in the stack

Private SuperIntelligence from Mitosis Labs is an AI concierge for family offices, enterprises and private clients: the most capable AI, trusted with everything. It works alongside the systems you already run, across the office's own email, documents and data, answers with citations, and acts within permissions you set. Each deployment is built for one client, from the hardware to the choice of model provider to where the data is stored, and the provider keeps no copy of the work. See [AI for family offices](/family-offices/).

## Frequently asked questions

### What software does a family office need?

A typical single-family office runs a portfolio and reporting system, accounting software that handles multiple entities, bill pay, a document vault and email. Some choose one integrated product that covers several layers, and others connect separate tools.

### What is the best family office software?

Citi's May 2026 research found no perfect single solution on the market, and offices choose on software maturity, data readiness and ease of integration. The right choice depends on your entity structure, asset mix and team size.

### What is the difference between single-family office and multi-family office software?

Many products serve both. Masttro, Asora and Asset Vantage each list single-family and multi-family offices among the clients they serve.

### Where does AI fit in a family office tech stack?

AI features now appear inside portfolio, accounting and document products. An AI assistant can also work across the stack, reading email, documents and reports together, while each system stays the record for its own data.

### What is the biggest barrier to family office technology?

Citi Institute, citing the Citi Wealth 2025 Global Family Office Report, found that 57% of family offices name lack of internal expertise as the top barrier.


## Related reading

- [Private AI for family offices](/blog/private-ai-for-family-offices/)
- [Consolidated reporting across custodians, without the Excel export](/blog/family-office-consolidated-reporting/)
- [Tracking K-1s across 30 entities](/blog/k-1-tracking-across-entities/)
- [Capital call notices: catching every one, across every trust and LLC](/blog/capital-call-tracking/)
- [Family office operations, and where AI changes the staff math](/blog/family-office-operations-and-ai/)
- [Family office cybersecurity, now that AI is part of the attack surface](/blog/family-office-cybersecurity-and-ai/)
- [What is private superintelligence?](/blog/what-is-private-superintelligence/)

## Sources

- [AI in the Family Office: Privacy, Efficiency and Institutional Rigor (Citi Institute, May 2026)](https://www.citigroup.com/rcs/citigpa/storage/public/ai_in_the_family_office.pdf)
- [Addepar home page (Addepar, accessed 2026-10-15)](https://addepar.com/)
- [Masttro home page (Masttro, accessed 2026-10-15)](https://masttro.com/)
- [Eton Solutions home page (Eton Solutions, accessed 2026-10-15)](https://www.eton-solutions.com/)
- [Asora home page (Asora, accessed 2026-10-15)](https://asora.com/)
- [Asset Vantage home page (Asset Vantage, accessed 2026-10-15)](https://www.assetvantage.com/)