Family office technology is the software a family office uses to keep its books, move money, track the family's wealth, manage documents, protect data and, more recently, query all of it with AI.
Most offices run several connected tools rather than one system, and the general ledger sits at the center because every other tool either sends data to it or reads from it.
This guide covers what a family office tech stack includes, how each layer connects to the books, where AI helps today, and how to build or upgrade the stack.
Family office technology at a glance
Layer | What it does | Example tools | How it connects to the books |
General ledger and accounting | Keeps the official books for every entity and produces financial reporting | SumIt, QuickBooks | It is the books |
Bank feeds | Imports bank and card transactions every day | Plaid, Finicity, SFTP bank files | Transactions post as entries through bank rules |
Bill pay and spend | Routes invoices for approval, pays vendors and manages cards | Bill.com, Ramp | Each bill and payment becomes an entry |
Portfolio aggregation and investment reporting | Consolidates holdings across custodians and calculates performance | Addepar, Aleta, Masttro, Asset Vantage | Investment transactions and gains or losses flow into the ledger |
Document management and workflow | Captures statements, capital calls and K-1s, and tracks approvals | Canoe, iPaladin | Extracted figures support entries and reviews |
AI assistants | Answer questions about the office's data in plain language | Claude, ChatGPT through MCP | Read the books with the user's permissions |
What is family office technology?
Family office technology is the set of digital systems that runs the back office, middle office and front office of a family office. The back office covers accounting, bill pay, tax preparation and financial reporting.
The middle office covers operations, risk, compliance and data management. The front office covers investments, private markets, wealth management and relationship management with the family.
In most family offices the same small team covers all three. On SumIt, the median office has between 3 and 7 people using the platform, and that number barely changes with the size of the office. Technology carries the extra operations work as the structure grows.
What does a family office tech stack include?
Most offices run five working layers, with security and AI applied across all of them.
General ledger and accounting software
The general ledger (GL) is the official record of every entity's transactions, from trusts and LLCs to partnerships and individuals. It produces the balance sheet, income statement, consolidated reports and net worth statement.
Many offices start on QuickBooks and Excel, with one file per entity. That setup tends to break down somewhere between 5 and 10 entities, when consolidation turns into a monthly spreadsheet project.
Bank feeds and cash data
Bank feeds import bank and card transactions into the books every day. About 8 in 10 SumIt clients run bank feeds, and nearly all of them use the feeds every week.
The typical SumIt client connects about 4 bank logins, and many mix providers: Plaid, Finicity and SFTP bank files often run side by side in the same office.
Bill pay software
Bill pay tools such as Bill.com route invoices for approval and pay vendors, and spend tools such as Ramp manage cards and reimbursements. About 4 in 10 SumIt clients connect Bill.com, and they use it every week.
Each approved bill and each payment becomes an entry in the ledger, including payments one entity makes on behalf of another.
Portfolio aggregation and investment reporting
Portfolio aggregation tools pull holdings from custodians, banks and fund managers into one view of the family's wealth and calculate investment performance. Addepar is the most common tool in this layer.
About 1 in 4 SumIt clients connect Addepar, and most import once a month, around the close. SumIt brings in investment transactions and realized and unrealized gains and losses, while performance reporting stays in Addepar.
Document management and workflow
Document management tools collect statements, capital call notices and K-1s, which pile up fastest in private markets and alternative investments.
Canoe extracts data from those documents, and iPaladin organizes approvals and a digital archive of family documents. Many offices add a CRM for relationship management with family members and advisors.
Why the general ledger is the center of the tech stack
The ledger sits at the center because every other layer writes to it or reads from it. Bank feeds and bill pay create entries, investment reporting sends investment activity, and reports and AI tools read the results.
Alex Lin, SumIt's CEO and co-founder, describes family office software as fragmented, so the tools need to talk to each other through an API or an MCP connector. A typical SumIt client connects 2 of the 4 main integration types: bank feeds, bill pay, Addepar and the MCP connector.
When those connections work, automation handles most of the day-to-day operations. About 97% of inter-entity journal entries on SumIt come from the system: 71% from bank-feed categorization, 26% from bill payments and under 3% typed by hand.
Over the last 12 months on SumIt:
Bank rules grew about 4x, to more than 12,000.
Entries booked from bank feeds grew about 3x, to roughly 44,000 a month.
Bill and payment entries grew about 2.7x.
Hand-keyed entries stayed flat, so all of the growth came through automation.
See how SumIt's strategic integrations connect each layer.
How family offices use AI and MCP today
Artificial intelligence in a family office today mostly means assistants such as Claude and ChatGPT answering questions about the office's own data. The Model Context Protocol (MCP) is the standard that connects those assistants to other software, including accounting systems.
SumIt launched its MCP connector in June 2026. About 1 in 5 SumIt clients now use it, and most of them used it in the last 30 days. Users have run roughly 9,600 queries since launch.
It works as a controller and CFO tool: usually one power user per office, asking questions in short batches of about 10. What users look up, as a share of queries:
Individual transaction detail: about 31%
Account balances as of a date: about 30%
Transaction lists and searches: about 18%
Chart of accounts, entities and codes: about 12%
Financial statements: about 8%
Most of those queries support reconciliation and tie-outs, transaction review, and month-end close. A controller can ask for every legal expense across all entities over two years and get the total in one answer.
AI helps most by gathering context from data spread across many systems, so the team makes better-informed decisions about the family's wealth. The team still makes the decisions.
Family office cybersecurity and compliance: what to ask vendors
Family office cybersecurity means protecting the family's wealth, financial data and payment operations across every tool in the stack.
A Family Wealth Report article found that only 8% of family offices have dedicated cybersecurity staff, 67% work without an outside security provider and 63% do not train their staff.
Four controls cover most of the risk:
Multi-factor authentication (MFA). Turn it on for every tool that holds financial records or moves money.
Payment verification. Confirm wire and payment requests through a second channel before anyone releases funds.
Role-based permissions. Give outside accountants and advisors read-only access when they only need to review.
Audit trail. Record every change to the books for compliance, including who made it and which field changed.
Before connecting a new vendor, ask three questions: Does it have a SOC 2 report? How does it secure its MCP connection? Exactly which data can its AI features see? Keep the answers on file for compliance reviews.
How to build a family office tech stack
Build the stack in order, starting with the books.
Map your entities and ownership, then keep the books for all of them in one general ledger.
Connect bank feeds and bill pay so transactions reach the books through automation instead of manual entry.
Add portfolio aggregation to report on the family's wealth, and connect it to the ledger.
Set MFA, permissions and payment controls before you connect AI tools.
Check the company behind each tool. Alex Lin points to weak vendor due diligence as the most common mistake: ask about funding, client churn and roadmap priorities, and talk to clients who have used the product for three years, two years and a few weeks.
Frequently asked questions
What technology do family offices use?
Most use an accounting system, bank feeds, a bill pay tool, an investment reporting platform such as Addepar, document management and a CRM. Smaller offices often still run on QuickBooks and Excel.
What software do family offices use for accounting?
Family offices use a general ledger built for many entities, such as SumIt, or a general-purpose tool such as QuickBooks with one file per entity. The second option gets harder to manage past 5 to 10 entities.
Is it safe to use AI with family office financial data?
It can be, when the connection respects user permissions and the vendor can show a SOC 2 report and explain what its AI can access. SumIt's MCP connector reads the books with each user's own permissions.
When should a family office upgrade its technology?
Most offices upgrade when they pass 5 to 10 entities, when the close takes weeks of spreadsheet work, or when principals want reports faster than the team can produce them.
Build your family office tech stack on SumIt
SumIt is a general ledger built for family offices, with bank feed, Bill.com and Addepar integrations and an MCP connector for AI assistants. Talk to our team or see how SumIt works for single-family offices and multi-family offices.
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